Issue #26778: Fixed "a/an/and" typos in code comment, documentation and error

messages.

Doc/c-api/set.rst

@@ -128,7 +128,7 @@ or :class:`frozenset` or instances of their subtypes.
    of brand new frozensets before they are exposed to other code).  Return 0 on
    success or -1 on failure. Raise a :exc:`TypeError` if the *key* is
    unhashable. Raise a :exc:`MemoryError` if there is no room to grow.  Raise a
-   :exc:`SystemError` if *set* is an not an instance of :class:`set` or its
+   :exc:`SystemError` if *set* is not an instance of :class:`set` or its
    subtype.
 
 
@@ -142,7 +142,7 @@ subtypes but not for instances of :class:`frozenset` or its subtypes.
    error is encountered.  Does not raise :exc:`KeyError` for missing keys.  Raise a
    :exc:`TypeError` if the *key* is unhashable.  Unlike the Python :meth:`~set.discard`
    method, this function does not automatically convert unhashable sets into
-   temporary frozensets. Raise :exc:`PyExc_SystemError` if *set* is an not an
+   temporary frozensets. Raise :exc:`PyExc_SystemError` if *set* is not an
    instance of :class:`set` or its subtype.
 
 
@@ -150,7 +150,7 @@ subtypes but not for instances of :class:`frozenset` or its subtypes.
 
    Return a new reference to an arbitrary object in the *set*, and removes the
    object from the *set*.  Return *NULL* on failure.  Raise :exc:`KeyError` if the
-   set is empty. Raise a :exc:`SystemError` if *set* is an not an instance of
+   set is empty. Raise a :exc:`SystemError` if *set* is not an instance of
    :class:`set` or its subtype.
 
 

Doc/c-api/unicode.rst

@@ -367,7 +367,7 @@ These APIs can be used to work with surrogates:
 
 .. c:macro:: Py_UNICODE_IS_HIGH_SURROGATE(ch)
 
-   Check if *ch* is an high surrogate (``0xD800 <= ch <= 0xDBFF``).
+   Check if *ch* is a high surrogate (``0xD800 <= ch <= 0xDBFF``).
 
 .. c:macro:: Py_UNICODE_IS_LOW_SURROGATE(ch)
 
@@ -450,7 +450,7 @@ APIs:
    | :attr:`%%`        | *n/a*               | The literal % character.       |
    +-------------------+---------------------+--------------------------------+
    | :attr:`%c`        | int                 | A single character,            |
-   |                   |                     | represented as an C int.       |
+   |                   |                     | represented as a C int.        |
    +-------------------+---------------------+--------------------------------+
    | :attr:`%d`        | int                 | Exactly equivalent to          |
    |                   |                     | ``printf("%d")``.              |

Doc/distutils/apiref.rst

@@ -837,7 +837,7 @@ selection by :class:`MSVCCompiler`.
 .. module:: distutils.bcppcompiler
 
 
-This module provides :class:`BorlandCCompiler`, an subclass of the abstract
+This module provides :class:`BorlandCCompiler`, a subclass of the abstract
 :class:`CCompiler` class for the Borland C++ compiler.
 
 

Doc/library/asyncio-eventloop.rst

@@ -513,7 +513,7 @@ Low-level socket operations
 
    The *address* must be already resolved to avoid the trap of hanging the
    entire event loop when the address requires doing a DNS lookup.  For
-   example, it must be an IP address, not an hostname, for
+   example, it must be an IP address, not a hostname, for
    :py:data:`~socket.AF_INET` and :py:data:`~socket.AF_INET6` address families.
    Use :meth:`getaddrinfo` to resolve the hostname asynchronously.
 

Doc/library/ctypes.rst

@@ -671,7 +671,7 @@ positive integer::
 
    TenPointsArrayType = POINT * 10
 
-Here is an example of an somewhat artificial data type, a structure containing 4
+Here is an example of a somewhat artificial data type, a structure containing 4
 POINTs among other stuff::
 
    >>> from ctypes import *
@@ -1888,7 +1888,7 @@ Utility functions
 .. function:: POINTER(type)
 
    This factory function creates and returns a new ctypes pointer type. Pointer
-   types are cached an reused internally, so calling this function repeatedly is
+   types are cached and reused internally, so calling this function repeatedly is
    cheap. *type* must be a ctypes type.
 
 

Doc/library/idle.rst

@@ -128,7 +128,7 @@ Find Selection
    Search for the currently selected string, if there is one.
 
 Find in Files...
-   Open a file search dialog.  Put results in an new output window.
+   Open a file search dialog.  Put results in a new output window.
 
 Replace...
    Open a search-and-replace dialog.

Doc/library/shutil.rst

@@ -342,7 +342,7 @@ Directory and files operations
    Return the path to an executable which would be run if the given *cmd* was
    called.  If no *cmd* would be called, return ``None``.
 
-   *mode* is a permission mask passed a to :func:`os.access`, by default
+   *mode* is a permission mask passed to :func:`os.access`, by default
    determining if the file exists and executable.
 
    When no *path* is specified, the results of :func:`os.environ` are used,

Doc/library/tarfile.rst

@@ -129,7 +129,7 @@ Some facts and figures:
    | ``'r|bz2'`` | Open a bzip2 compressed *stream* for       |
    |             | reading.                                   |
    +-------------+--------------------------------------------+
-   | ``'r|xz'``  | Open a lzma compressed *stream* for        |
+   | ``'r|xz'``  | Open an lzma compressed *stream* for       |
    |             | reading.                                   |
    +-------------+--------------------------------------------+
    | ``'w|'``    | Open an uncompressed *stream* for writing. |

Doc/library/tkinter.tix.rst

@@ -267,7 +267,7 @@ File Selectors
 
    The `ExFileSelectBox
    <http://tix.sourceforge.net/dist/current/man/html/TixCmd/tixExFileSelectBox.htm>`_
-   widget is usually embedded in a tixExFileSelectDialog widget. It provides an
+   widget is usually embedded in a tixExFileSelectDialog widget. It provides a
    convenient method for the user to select files. The style of the
    :class:`ExFileSelectBox` widget is very similar to the standard file dialog on
    MS Windows 3.1.

Doc/tutorial/datastructures.rst

@@ -397,7 +397,7 @@ objects, such as lists.
 
 Though tuples may seem similar to lists, they are often used in different
 situations and for different purposes.
-Tuples are :term:`immutable`, and usually contain an heterogeneous sequence of
+Tuples are :term:`immutable`, and usually contain a heterogeneous sequence of
 elements that are accessed via unpacking (see later in this section) or indexing
 (or even by attribute in the case of :func:`namedtuples <collections.namedtuple>`).
 Lists are :term:`mutable`, and their elements are usually homogeneous and are

Doc/whatsnew/2.2.rst

@@ -720,7 +720,7 @@ possible types of the operands.
 
 (The controversy is over whether this is *really* a design flaw, and whether
 it's worth breaking existing code to fix this.  It's caused endless discussions
-on python-dev, and in July 2001 erupted into an storm of acidly sarcastic
+on python-dev, and in July 2001 erupted into a storm of acidly sarcastic
 postings on :newsgroup:`comp.lang.python`. I won't argue for either side here
 and will stick to describing what's  implemented in 2.2.  Read :pep:`238` for a
 summary of arguments and counter-arguments.)

Doc/whatsnew/3.4.rst

@@ -1457,7 +1457,7 @@ s), as well as a :meth:`~ssl.SSLContext.get_ca_certs` method that returns a
 list of the loaded ``CA`` certificates.  (Contributed by Christian Heimes in
 :issue:`18147`.)
 
-If OpenSSL 0.9.8 or later is available, :class:`~ssl.SSLContext` has an new
+If OpenSSL 0.9.8 or later is available, :class:`~ssl.SSLContext` has a new
 attribute :attr:`~ssl.SSLContext.verify_flags` that can be used to control the
 certificate verification process by setting it to some combination of the new
 constants :data:`~ssl.VERIFY_DEFAULT`, :data:`~ssl.VERIFY_CRL_CHECK_LEAF`,

Doc/whatsnew/3.6.rst

@@ -214,7 +214,7 @@ directives ``%G``, ``%u`` and ``%V``.
 faulthandler
 ------------
 
-On Windows, the :mod:`faulthandler` module now installs an handler for Windows
+On Windows, the :mod:`faulthandler` module now installs a handler for Windows
 exceptions: see :func:`faulthandler.enable`. (Contributed by Victor Stinner in
 :issue:`23848`.)
 

Include/listobject.h

@@ -2,7 +2,7 @@
 /* List object interface */
 
 /*
-Another generally useful object type is an list of object pointers.
+Another generally useful object type is a list of object pointers.
 This is a mutable type: the list items can be changed, and items can be
 added or removed.  Out-of-range indices or non-list objects are ignored.
 

Include/unicodeobject.h

@@ -844,7 +844,7 @@ PyAPI_FUNC(int) PyUnicode_Resize(
     Py_ssize_t length           /* New length */
     );
 
-/* Decode obj to an Unicode object.
+/* Decode obj to a Unicode object.
 
    bytes, bytearray and other bytes-like objects are decoded according to the
    given encoding and error handler. The encoding and error handler can be

Lib/_pydecimal.py

@@ -252,7 +252,7 @@ class InvalidOperation(DecimalException):
 class ConversionSyntax(InvalidOperation):
     """Trying to convert badly formed string.
 
-    This occurs and signals invalid-operation if an string is being
+    This occurs and signals invalid-operation if a string is being
     converted to a number and it does not conform to the numeric string
     syntax.  The result is [0,qNaN].
     """

Lib/_pyio.py

@@ -439,7 +439,7 @@ class IOBase(metaclass=abc.ABCMeta):
         return self.__closed
 
     def _checkClosed(self, msg=None):
-        """Internal: raise an ValueError if file is closed
+        """Internal: raise a ValueError if file is closed
         """
         if self.closed:
             raise ValueError("I/O operation on closed file."

Lib/asyncio/selector_events.py

@@ -387,7 +387,7 @@ class BaseSelectorEventLoop(base_events.BaseEventLoop):
 
         The address must be already resolved to avoid the trap of hanging the
         entire event loop when the address requires doing a DNS lookup. For
-        example, it must be an IP address, not an hostname, for AF_INET and
+        example, it must be an IP address, not a hostname, for AF_INET and
         AF_INET6 address families. Use getaddrinfo() to resolve the hostname
         asynchronously.
 

Lib/email/_header_value_parser.py

@@ -1522,7 +1522,7 @@ def get_qp_ctext(value):
     This is not the RFC ctext, since we are handling nested comments in comment
     and unquoting quoted-pairs here.  We allow anything except the '()'
     characters, but if we find any ASCII other than the RFC defined printable
-    ASCII an NonPrintableDefect is added to the token's defects list.  Since
+    ASCII, a NonPrintableDefect is added to the token's defects list.  Since
     quoted pairs are converted to their unquoted values, what is returned is
     a 'ptext' token.  In this case it is a WhiteSpaceTerminal, so it's value
     is ' '.
@@ -1537,7 +1537,7 @@ def get_qcontent(value):
     """qcontent = qtext / quoted-pair
 
     We allow anything except the DQUOTE character, but if we find any ASCII
-    other than the RFC defined printable ASCII an NonPrintableDefect is
+    other than the RFC defined printable ASCII, a NonPrintableDefect is
     added to the token's defects list.  Any quoted pairs are converted to their
     unquoted values, so what is returned is a 'ptext' token.  In this case it
     is a ValueTerminal.
@@ -1882,7 +1882,7 @@ def get_dtext(value):
         obs-dtext = obs-NO-WS-CTL / quoted-pair
 
     We allow anything except the excluded characters, but if we find any
-    ASCII other than the RFC defined printable ASCII an NonPrintableDefect is
+    ASCII other than the RFC defined printable ASCII, a NonPrintableDefect is
     added to the token's defects list.  Quoted pairs are converted to their
     unquoted values, so what is returned is a ptext token, in this case a
     ValueTerminal.  If there were quoted-printables, an ObsoleteHeaderDefect is

Lib/email/headerregistry.py

@@ -109,7 +109,7 @@ class Group:
     def __init__(self, display_name=None, addresses=None):
         """Create an object representing an address group.
 
-        An address group consists of a display_name followed by colon and an
+        An address group consists of a display_name followed by colon and a
         list of addresses (see Address) terminated by a semi-colon.  The Group
         is created by specifying a display_name and a possibly empty list of
         Address objects.  A Group can also be used to represent a single

Lib/idlelib/AutoComplete.py

@@ -64,7 +64,7 @@ class AutoComplete:
 
     def try_open_completions_event(self, event):
         """Happens when it would be nice to open a completion list, but not
-        really necessary, for example after an dot, so function
+        really necessary, for example after a dot, so function
         calls won't be made.
         """
         lastchar = self.text.get("insert-1c")

Lib/idlelib/Debugger.py

@@ -372,7 +372,7 @@ class StackViewer(ScrolledList):
     def __init__(self, master, flist, gui):
         if macosxSupport.isAquaTk():
             # At least on with the stock AquaTk version on OSX 10.4 you'll
-            # get an shaking GUI that eventually kills IDLE if the width
+            # get a shaking GUI that eventually kills IDLE if the width
             # argument is specified.
             ScrolledList.__init__(self, master)
         else:

Lib/idlelib/WidgetRedirector.py

@@ -68,7 +68,7 @@ class WidgetRedirector:
         '''Return OriginalCommand(operation) after registering function.
 
         Registration adds an operation: function pair to ._operations.
-        It also adds an widget function attribute that masks the tkinter
+        It also adds a widget function attribute that masks the tkinter
         class instance method.  Method masking operates independently
         from command dispatch.
 

Lib/idlelib/configDialog.py

@@ -1196,7 +1196,7 @@ class ConfigDialog(Toplevel):
 
         All values are treated as text, and it is up to the user to supply
         reasonable values. The only exception to this are the 'enable*' options,
-        which are boolean, and can be toggled with an True/False button.
+        which are boolean, and can be toggled with a True/False button.
         """
         parent = self.parent
         frame = self.tabPages.pages['Extensions'].frame

Lib/lib2to3/fixer_base.py

@@ -49,7 +49,7 @@ class BaseFix(object):
         """Initializer.  Subclass may override.
 
         Args:
-            options: an dict containing the options passed to RefactoringTool
+            options: a dict containing the options passed to RefactoringTool
             that could be used to customize the fixer through the command line.
             log: a list to append warnings and other messages to.
         """

Lib/lib2to3/refactor.py

@@ -184,7 +184,7 @@ class RefactoringTool(object):
 
         Args:
             fixer_names: a list of fixers to import
-            options: an dict with configuration.
+            options: a dict with configuration.
             explicit: a list of fixers to run even if they are explicit.
         """
         self.fixers = fixer_names

Lib/lzma.py

@@ -279,7 +279,7 @@ def open(filename, mode="rb", *,
     constructor: LZMAFile(filename, mode, ...). In this case, the
     encoding, errors and newline arguments must not be provided.
 
-    For text mode, a LZMAFile object is created, and wrapped in an
+    For text mode, an LZMAFile object is created, and wrapped in an
     io.TextIOWrapper instance with the specified encoding, error
     handling behavior, and line ending(s).
 

Lib/mailbox.py

@@ -1821,7 +1821,7 @@ class BabylMessage(Message):
     _type_specific_attributes = ['_labels', '_visible']
 
     def __init__(self, message=None):
-        """Initialize an BabylMessage instance."""
+        """Initialize a BabylMessage instance."""
         self._labels = []
         self._visible = Message()
         Message.__init__(self, message)

Lib/multiprocessing/managers.py

@@ -842,7 +842,7 @@ def RebuildProxy(func, token, serializer, kwds):
 
 def MakeProxyType(name, exposed, _cache={}):
     '''
-    Return an proxy type whose methods are given by `exposed`
+    Return a proxy type whose methods are given by `exposed`
     '''
     exposed = tuple(exposed)
     try:

Lib/optparse.py

@@ -1362,7 +1362,7 @@ class OptionParser (OptionContainer):
         sys.argv[1:]).  Any errors result in a call to 'error()', which
         by default prints the usage message to stderr and calls
         sys.exit() with an error message.  On success returns a pair
-        (values, args) where 'values' is an Values instance (with all
+        (values, args) where 'values' is a Values instance (with all
         your option values) and 'args' is the list of arguments left
         over after parsing options.
         """

Lib/pprint.py

@@ -72,7 +72,7 @@ def isrecursive(object):
 class _safe_key:
     """Helper function for key functions when sorting unorderable objects.
 
-    The wrapped-object will fallback to an Py2.x style comparison for
+    The wrapped-object will fallback to a Py2.x style comparison for
     unorderable types (sorting first comparing the type name and then by
     the obj ids).  Does not work recursively, so dict.items() must have
     _safe_key applied to both the key and the value.

Lib/socket.py

@@ -685,7 +685,7 @@ def create_connection(address, timeout=_GLOBAL_DEFAULT_TIMEOUT,
     global default timeout setting returned by :func:`getdefaulttimeout`
     is used.  If *source_address* is set it must be a tuple of (host, port)
     for the socket to bind as a source address before making the connection.
-    An host of '' or port 0 tells the OS to use the default.
+    A host of '' or port 0 tells the OS to use the default.
     """
 
     host, port = address

Lib/socketserver.py

@@ -747,7 +747,7 @@ class StreamRequestHandler(BaseRequestHandler):
             try:
                 self.wfile.flush()
             except socket.error:
-                # An final socket error may have occurred here, such as
+                # A final socket error may have occurred here, such as
                 # the local error ECONNABORTED.
                 pass
         self.wfile.close()

Lib/sqlite3/test/regression.py

@@ -73,7 +73,7 @@ class RegressionTests(unittest.TestCase):
     def CheckStatementFinalizationOnCloseDb(self):
         # pysqlite versions <= 2.3.3 only finalized statements in the statement
         # cache when closing the database. statements that were still
-        # referenced in cursors weren't closed an could provoke "
+        # referenced in cursors weren't closed and could provoke "
         # "OperationalError: Unable to close due to unfinalised statements".
         con = sqlite.connect(":memory:")
         cursors = []

Lib/tarfile.py

@@ -1528,9 +1528,9 @@ class TarFile(object):
 
            'x' or 'x:'  create a tarfile exclusively without compression, raise
                         an exception if the file is already created
-           'x:gz'       create an gzip compressed tarfile, raise an exception
+           'x:gz'       create a gzip compressed tarfile, raise an exception
                         if the file is already created
-           'x:bz2'      create an bzip2 compressed tarfile, raise an exception
+           'x:bz2'      create a bzip2 compressed tarfile, raise an exception
                         if the file is already created
            'x:xz'       create an lzma compressed tarfile, raise an exception
                         if the file is already created

Lib/test/test_asyncio/test_selector_events.py

@@ -1182,7 +1182,7 @@ class SelectorSslTransportTests(test_utils.TestCase):
         self.assertIs(exc, waiter.exception())
 
     def test_cancel_handshake(self):
-        # Python issue #23197: cancelling an handshake must not raise an
+        # Python issue #23197: cancelling a handshake must not raise an
         # exception or log an error, even if the handshake failed
         waiter = asyncio.Future(loop=self.loop)
         transport = self.ssl_transport(waiter=waiter)

Lib/test/test_asyncio/test_sslproto.py

@@ -40,7 +40,7 @@ class SslProtoHandshakeTests(test_utils.TestCase):
             ssl_proto.connection_made(transport)
 
     def test_cancel_handshake(self):
-        # Python issue #23197: cancelling an handshake must not raise an
+        # Python issue #23197: cancelling a handshake must not raise an
         # exception or log an error, even if the handshake failed
         waiter = asyncio.Future(loop=self.loop)
         ssl_proto = self.ssl_protocol(waiter)

Lib/test/test_binop.py

@@ -58,7 +58,7 @@ class Rat(object):
     den = property(_get_den, None)
 
     def __repr__(self):
-        """Convert a Rat to an string resembling a Rat constructor call."""
+        """Convert a Rat to a string resembling a Rat constructor call."""
         return "Rat(%d, %d)" % (self.__num, self.__den)
 
     def __str__(self):

Lib/test/test_faulthandler.py

@@ -715,7 +715,7 @@ class FaultHandlerTests(unittest.TestCase):
             sys.stderr = stderr
 
     def test_stderr_None(self):
-        # Issue #21497: provide an helpful error if sys.stderr is None,
+        # Issue #21497: provide a helpful error if sys.stderr is None,
         # instead of just an attribute error: "None has no attribute fileno".
         with self.check_stderr_none():
             faulthandler.enable()

Lib/test/test_pathlib.py

@@ -200,7 +200,7 @@ class _BasePurePathTest(object):
 
     def _check_str_subclass(self, *args):
         # Issue #21127: it should be possible to construct a PurePath object
-        # from an str subclass instance, and it then gets converted to
+        # from a str subclass instance, and it then gets converted to
         # a pure str object.
         class StrSubclass(str):
             pass

Lib/test/test_sys.py

@@ -644,7 +644,7 @@ class SysModuleTest(unittest.TestCase):
         self.assertEqual(os.path.abspath(sys.executable), sys.executable)
 
         # Issue #7774: Ensure that sys.executable is an empty string if argv[0]
-        # has been set to an non existent program name and Python is unable to
+        # has been set to a non existent program name and Python is unable to
         # retrieve the real program name
 
         # For a normal installation, it should work without 'cwd'

Lib/test/test_threading.py

@@ -1083,7 +1083,7 @@ class EventTests(lock_tests.EventTests):
     eventtype = staticmethod(threading.Event)
 
 class ConditionAsRLockTests(lock_tests.RLockTests):
-    # An Condition uses an RLock by default and exports its API.
+    # Condition uses an RLock by default and exports its API.
     locktype = staticmethod(threading.Condition)
 
 class ConditionTests(lock_tests.ConditionTests):

Lib/test/test_tools/test_gprof2html.py

@@ -22,7 +22,7 @@ class Gprof2htmlTests(unittest.TestCase):
         sys.argv = []
 
     def test_gprof(self):
-        # Issue #14508: this used to fail with an NameError.
+        # Issue #14508: this used to fail with a NameError.
         with mock.patch.object(self.gprof, 'webbrowser') as wmock, \
                 tempfile.TemporaryDirectory() as tmpdir:
             fn = os.path.join(tmpdir, 'abc')

Lib/test/test_zipapp.py

@@ -195,7 +195,7 @@ class ZipAppTest(unittest.TestCase):
         self.assertTrue(new_target.getvalue().startswith(b'#!python2.7\n'))
 
     def test_read_from_pathobj(self):
-        # Test that we can copy an archive using an pathlib.Path object
+        # Test that we can copy an archive using a pathlib.Path object
         # for the source.
         source = self.tmpdir / 'source'
         source.mkdir()

Lib/tkinter/__init__.py

@@ -2771,7 +2771,7 @@ class Menu(Widget):
                     self.deletecommand(c)
         self.tk.call(self._w, 'delete', index1, index2)
     def entrycget(self, index, option):
-        """Return the resource value of an menu item for OPTION at INDEX."""
+        """Return the resource value of a menu item for OPTION at INDEX."""
         return self.tk.call(self._w, 'entrycget', index, '-' + option)
     def entryconfigure(self, index, cnf=None, **kw):
         """Configure a menu item at INDEX."""

Lib/tkinter/dnd.py

@@ -3,7 +3,7 @@
 This is very preliminary.  I currently only support dnd *within* one
 application, between different windows (or within the same window).
 
-I an trying to make this as generic as possible -- not dependent on
+I am trying to make this as generic as possible -- not dependent on
 the use of a particular widget or icon type, etc.  I also hope that
 this will work with Pmw.
 

Lib/tkinter/test/test_ttk/test_functions.py

@@ -193,7 +193,7 @@ class InternalFunctionsTest(unittest.TestCase):
 
         ## Testing type = vsapi
         # vsapi type expects at least a class name and a part_id, so this
-        # should raise an ValueError since it tries to get two elements from
+        # should raise a ValueError since it tries to get two elements from
         # an empty tuple
         self.assertRaises(ValueError, ttk._format_elemcreate, 'vsapi')
 

Lib/tkinter/tix.py

@@ -221,7 +221,7 @@ class Tk(tkinter.Tk, tixCommand):
         self.tk.eval('package require Tix')
 
     def destroy(self):
-        # For safety, remove an delete_window binding before destroy
+        # For safety, remove the delete_window binding before destroy
         self.protocol("WM_DELETE_WINDOW", "")
         tkinter.Tk.destroy(self)
 
@@ -702,7 +702,7 @@ class DirSelectBox(TixWidget):
 
 class ExFileSelectBox(TixWidget):
     """ExFileSelectBox - MS Windows style file select box.
-    It provides an convenient method for the user to select files.
+    It provides a convenient method for the user to select files.
 
     Subwidget       Class
     ---------       -----
@@ -760,7 +760,7 @@ class DirSelectDialog(TixWidget):
 # Should inherit from a Dialog class
 class ExFileSelectDialog(TixWidget):
     """ExFileSelectDialog - MS Windows style file select dialog.
-    It provides an convenient method for the user to select files.
+    It provides a convenient method for the user to select files.
 
     Subwidgets       Class
     ----------       -----

Lib/tkinter/ttk.py

@@ -1478,7 +1478,7 @@ class LabeledScale(Frame):
     can be accessed through instance.label"""
 
     def __init__(self, master=None, variable=None, from_=0, to=10, **kw):
-        """Construct an horizontal LabeledScale with parent master, a
+        """Construct a horizontal LabeledScale with parent master, a
         variable to be associated with the Ttk Scale widget and its range.
         If variable is not specified, a tkinter.IntVar is created.
 

Lib/xmlrpc/client.py

@@ -1446,7 +1446,7 @@ class ServerProxy:
         # magic method dispatcher
         return _Method(self.__request, name)
 
-    # note: to call a remote object with an non-standard name, use
+    # note: to call a remote object with a non-standard name, use
     # result getattr(server, "strange-python-name")(args)
 
     def __call__(self, attr):

Lib/zipapp.py

@@ -89,9 +89,10 @@ def create_archive(source, target=None, interpreter=None, main=None):
     The created application archive will have a shebang line specifying
     that it should run with INTERPRETER (there will be no shebang line if
     INTERPRETER is None), and a __main__.py which runs MAIN (if MAIN is
-    not specified, an existing __main__.py will be used). It is an to specify
-    MAIN for anything other than a directory source with no __main__.py, and it
-    is an error to omit MAIN if the directory has no __main__.py.
+    not specified, an existing __main__.py will be used).  It is an error
+    to specify MAIN for anything other than a directory source with no
+    __main__.py, and it is an error to omit MAIN if the directory has no
+    __main__.py.
     """
     # Are we copying an existing archive?
     source_is_file = False

Misc/HISTORY

@@ -7220,7 +7220,7 @@ Library
   cElementTree module is updated too.
 
 - Issue #7774: Set sys.executable to an empty string if argv[0] has been set to
-  an non existent program name and Python is unable to retrieve the real program
+  a non existent program name and Python is unable to retrieve the real program
   name.
 
 - Issue #7880: Fix sysconfig when the python executable is a symbolic link.
@@ -14013,7 +14013,7 @@ Core and builtins
   would not be removed while allocating a new weakref object.  Since
   GC could be invoked at that time, however, that assumption was
   invalid.  In a truly obscure case of GC being triggered during
-  creation for a new weakref object for an referent which already
+  creation for a new weakref object for a referent which already
   has a weakref without a callback which is only referenced from
   cyclic trash, a memory error can occur.  This consistently created a
   segfault in a debug build, but provided less predictable behavior in
@@ -18737,7 +18737,7 @@ Standard library
 
 - xml.dom.minidom offers a toprettyxml method. A number of DOM
   conformance issues have been resolved. In particular, Element now
-  has an hasAttributes method, and the handling of namespaces was
+  has a hasAttributes method, and the handling of namespaces was
   improved.
 
 - Ka-Ping Yee contributed two new modules: inspect.py, a module for
@@ -20227,7 +20227,7 @@ list of all new modules is included below.
 
 Probably the most pervasive change is the addition of Unicode support.
 We've added a new fundamental datatype, the Unicode string, a new
-build-in function unicode(), an numerous C APIs to deal with Unicode
+built-in function unicode(), and numerous C APIs to deal with Unicode
 and encodings.  See the file Misc/unicode.txt for details, or
 http://starship.python.net/crew/lemburg/unicode-proposal.txt.
 
@@ -21712,7 +21712,7 @@ real list objects.
 - The uu module now deals better with trailing garbage generated by
 some broke uuencoders.
 
-- The telnet module now has an my_interact() method which uses threads
+- The telnet module now has a my_interact() method which uses threads
 instead of select.  The interact() method uses this by default on
 Windows (where the single-threaded version doesn't work).
 
@@ -22769,7 +22769,7 @@ PyEval_CallMethod().
 - New macros to access object members for PyFunction, PyCFunction
 objects.
 
-- New APIs PyImport_AppendInittab() an PyImport_ExtendInittab() to
+- New APIs PyImport_AppendInittab() and PyImport_ExtendInittab() to
 dynamically add one or many entries to the table of built-in modules.
 
 - New macro Py_InitModule3(name, methods, doc) which calls
@@ -27179,7 +27179,7 @@ a string it is returned unchanged, otherwise it returns `x`.
 * repr(x) returns the same as `x`.  (Some users found it easier to
 have this as a function.)
 
-* round(x) returns the floating point number x rounded to an whole
+* round(x) returns the floating point number x rounded to a whole
 number, represented as a floating point number.  round(x, n) returns x
 rounded to n digits.
 

Misc/NEWS

@@ -1779,7 +1779,7 @@ Core and Builtins
 - Issue #24407: Fix crash when dict is mutated while being updated.
 
 - Issue #24619: New approach for tokenizing async/await. As a consequence,
-  is is now possible to have one-line 'async def foo(): await ..' functions.
+  it is now possible to have one-line 'async def foo(): await ..' functions.
 
 - Issue #24687: Plug refleak on SyntaxError in function parameters
   annotations.
@@ -4124,7 +4124,7 @@ Library
 - Issue #21000: Improve the command-line interface of json.tool.
 
 - Issue #20995: Enhance default ciphers used by the ssl module to enable
-  better security an prioritize perfect forward secrecy.
+  better security and prioritize perfect forward secrecy.
 
 - Issue #20884: Don't assume that __file__ is defined on importlib.__init__.
 

Modules/_csv.c

@@ -731,7 +731,7 @@ parse_process_char(ReaderObj *self, Py_UCS4 c)
         break;
 
     case QUOTE_IN_QUOTED_FIELD:
-        /* doublequote - seen a quote in an quoted field */
+        /* doublequote - seen a quote in a quoted field */
         if (dialect->quoting != QUOTE_NONE &&
             c == dialect->quotechar) {
             /* save "" as " */

Modules/_ctypes/_ctypes.c

@@ -3802,7 +3802,7 @@ PyCFuncPtr_call(PyCFuncPtrObject *self, PyObject *inargs, PyObject *kwds)
             return NULL;
         }
         /* there should be more checks? No, in Python */
-        /* First arg is an pointer to an interface instance */
+        /* First arg is a pointer to an interface instance */
         if (!this->b_ptr || *(void **)this->b_ptr == NULL) {
             PyErr_SetString(PyExc_ValueError,
                             "NULL COM pointer access");

Modules/_io/stringio.c

@@ -438,7 +438,7 @@ stringio_iternext(stringio *self)
                                            _PyIO_str_readline, NULL);
         if (line && !PyUnicode_Check(line)) {
             PyErr_Format(PyExc_IOError,
-                         "readline() should have returned an str object, "
+                         "readline() should have returned a str object, "
                          "not '%.200s'", Py_TYPE(line)->tp_name);
             Py_DECREF(line);
             return NULL;

Modules/_io/textio.c

@@ -2689,7 +2689,7 @@ textiowrapper_iternext(textio *self)
                                            _PyIO_str_readline, NULL);
         if (line && !PyUnicode_Check(line)) {
             PyErr_Format(PyExc_IOError,
-                         "readline() should have returned an str object, "
+                         "readline() should have returned a str object, "
                          "not '%.200s'", Py_TYPE(line)->tp_name);
             Py_DECREF(line);
             return NULL;

Modules/_pickle.c

@@ -4465,7 +4465,7 @@ Pickler_set_memo(PicklerObject *self, PyObject *obj)
     }
     else {
         PyErr_Format(PyExc_TypeError,
-                     "'memo' attribute must be an PicklerMemoProxy object"
+                     "'memo' attribute must be a PicklerMemoProxy object"
                      "or dict, not %.200s", Py_TYPE(obj)->tp_name);
         return -1;
     }
@@ -4703,7 +4703,7 @@ calc_binsize(char *bytes, int nbytes)
 
 /* s contains x bytes of a little-endian integer.  Return its value as a
  * C int.  Obscure:  when x is 1 or 2, this is an unsigned little-endian
- * int, but when x is 4 it's a signed one.  This is an historical source
+ * int, but when x is 4 it's a signed one.  This is a historical source
  * of x-platform bugs.
  */
 static long

Modules/_tracemalloc.c

@@ -719,7 +719,7 @@ tracemalloc_realloc(void *ctx, void *ptr, size_t new_size)
                the caller, because realloc() may already have shrinked the
                memory block and so removed bytes.
 
-               This case is very unlikely: an hash entry has just been
+               This case is very unlikely: a hash entry has just been
                released, so the hash table should have at least one free entry.
 
                The GIL and the table lock ensures that only one thread is

Modules/faulthandler.c

@@ -1178,7 +1178,7 @@ static PyMethodDef module_methods[] = {
     {"register",
      (PyCFunction)faulthandler_register_py, METH_VARARGS|METH_KEYWORDS,
      PyDoc_STR("register(signum, file=sys.stderr, all_threads=True, chain=False): "
-               "register an handler for the signal 'signum': dump the "
+               "register a handler for the signal 'signum': dump the "
                "traceback of the current thread, or of all threads if "
                "all_threads is True, into file")},
     {"unregister",

Modules/itertoolsmodule.c

@@ -4484,7 +4484,7 @@ static PyMethodDef zip_longest_methods[] = {
 PyDoc_STRVAR(zip_longest_doc,
 "zip_longest(iter1 [,iter2 [...]], [fillvalue=None]) --> zip_longest object\n\
 \n\
-Return an zip_longest object whose .__next__() method returns a tuple where\n\
+Return a zip_longest object whose .__next__() method returns a tuple where\n\
 the i-th element comes from the i-th iterable argument.  The .__next__()\n\
 method continues until the longest iterable in the argument sequence\n\
 is exhausted and then it raises StopIteration.  When the shorter iterables\n\

Modules/selectmodule.c

@@ -2127,7 +2127,7 @@ kqueue_queue_control(kqueue_queue_Object *self, PyObject *args)
         if (_PyTime_FromSecondsObject(&timeout,
                                       otimeout, _PyTime_ROUND_CEILING) < 0) {
             PyErr_Format(PyExc_TypeError,
-                "timeout argument must be an number "
+                "timeout argument must be a number "
                 "or None, got %.200s",
                 Py_TYPE(otimeout)->tp_name);
             return NULL;

Objects/bytearrayobject.c

@@ -3018,7 +3018,7 @@ bytearray(bytes_or_buffer) -> mutable copy of bytes_or_buffer\n\
 bytearray(int) -> bytes array of size given by the parameter initialized with null bytes\n\
 bytearray() -> empty bytes array\n\
 \n\
-Construct an mutable bytearray object from:\n\
+Construct a mutable bytearray object from:\n\
   - an iterable yielding integers in range(256)\n\
   - a text string encoded using the specified encoding\n\
   - a bytes or a buffer object\n\

Objects/rangeobject.c

@@ -5,7 +5,7 @@
 
 /* Support objects whose length is > PY_SSIZE_T_MAX.
 
-   This could be sped up for small PyLongs if they fit in an Py_ssize_t.
+   This could be sped up for small PyLongs if they fit in a Py_ssize_t.
    This only matters on Win64.  Though we could use PY_LONG_LONG which
    would presumably help perf.
 */

Objects/stringlib/unicode_format.h

@@ -1226,7 +1226,7 @@ static PyTypeObject PyFieldNameIter_Type = {
     0};
 
 /* unicode_formatter_field_name_split is used to implement
-   string.Formatter.vformat.  it takes an PEP 3101 "field name", and
+   string.Formatter.vformat.  it takes a PEP 3101 "field name", and
    returns a tuple of (first, rest): "first", the part before the
    first '.' or '['; and "rest", an iterator for the rest of the field
    name.  it's a wrapper around stringlib/string_format.h's

PC/clinic/winreg.c.h

@@ -120,7 +120,7 @@ PyDoc_STRVAR(winreg_ConnectRegistry__doc__,
 "ConnectRegistry($module, computer_name, key, /)\n"
 "--\n"
 "\n"
-"Establishes a connection to the registry on on another computer.\n"
+"Establishes a connection to the registry on another computer.\n"
 "\n"
 "  computer_name\n"
 "    The name of the remote computer, of the form r\"\\\\computername\".  If\n"
@@ -913,7 +913,7 @@ PyDoc_STRVAR(winreg_SetValueEx__doc__,
 "                     references to environment variables (for example,\n"
 "                     %PATH%).\n"
 "    REG_LINK -- A Unicode symbolic link.\n"
-"    REG_MULTI_SZ -- An sequence of null-terminated strings, terminated\n"
+"    REG_MULTI_SZ -- A sequence of null-terminated strings, terminated\n"
 "                    by two null characters.  Note that Python handles\n"
 "                    this termination automatically.\n"
 "    REG_NONE -- No defined value type.\n"
@@ -1056,4 +1056,4 @@ winreg_QueryReflectionKey(PyModuleDef *module, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=71f5bc30b646807b input=a9049054013a1b77]*/
+/*[clinic end generated code: output=5e346dccc296f9f1 input=a9049054013a1b77]*/

PC/winreg.c

@@ -792,7 +792,7 @@ winreg.ConnectRegistry -> HKEY
         The predefined key to connect to.
     /
 
-Establishes a connection to the registry on on another computer.
+Establishes a connection to the registry on another computer.
 
 The return value is the handle of the opened key.
 If the function fails, an OSError exception is raised.
@@ -801,7 +801,7 @@ If the function fails, an OSError exception is raised.
 static HKEY
 winreg_ConnectRegistry_impl(PyModuleDef *module, Py_UNICODE *computer_name,
                             HKEY key)
-/*[clinic end generated code: output=5c52f6f7ba6e7b46 input=9a056558ce318433]*/
+/*[clinic end generated code: output=5c52f6f7ba6e7b46 input=5f98a891a347e68e]*/
 {
     HKEY retKey;
     long rc;
@@ -1605,7 +1605,7 @@ winreg.SetValueEx
                          references to environment variables (for example,
                          %PATH%).
         REG_LINK -- A Unicode symbolic link.
-        REG_MULTI_SZ -- An sequence of null-terminated strings, terminated
+        REG_MULTI_SZ -- A sequence of null-terminated strings, terminated
                         by two null characters.  Note that Python handles
                         this termination automatically.
         REG_NONE -- No defined value type.
@@ -1631,7 +1631,7 @@ the configuration registry to help the registry perform efficiently.
 static PyObject *
 winreg_SetValueEx_impl(PyModuleDef *module, HKEY key, Py_UNICODE *value_name,
                        PyObject *reserved, DWORD type, PyObject *value)
-/*[clinic end generated code: output=ea092a935c361582 input=e73dec535ebeea7d]*/
+/*[clinic end generated code: output=ea092a935c361582 input=f1b16cbcc3ed4101]*/
 {
     BYTE *data;
     DWORD len;

Python/thread_nt.h

@@ -231,7 +231,7 @@ PyThread_start_new_thread(void (*func)(void *), void *arg)
 }
 
 /*
- * Return the thread Id instead of an handle. The Id is said to uniquely identify the
+ * Return the thread Id instead of a handle. The Id is said to uniquely identify the
  * thread in the system
  */
 long