Issue #10899: No function type annotations in the standard library.
Removed function type annotations from _pyio.py.
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1e28513d25
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3c94024c3e
62
Lib/_pyio.py
62
Lib/_pyio.py
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@ -34,9 +34,9 @@ class BlockingIOError(IOError):
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self.characters_written = characters_written
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def open(file: (str, bytes), mode: str = "r", buffering: int = -1,
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encoding: str = None, errors: str = None,
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newline: str = None, closefd: bool = True) -> "IOBase":
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def open(file, mode = "r", buffering = -1,
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encoding = None, errors = None,
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newline = None, closefd = True):
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r"""Open file and return a stream. Raise IOError upon failure.
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@ -287,14 +287,14 @@ class IOBase(metaclass=abc.ABCMeta):
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### Internal ###
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def _unsupported(self, name: str) -> IOError:
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def _unsupported(self, name):
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"""Internal: raise an exception for unsupported operations."""
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raise UnsupportedOperation("%s.%s() not supported" %
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(self.__class__.__name__, name))
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### Positioning ###
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def seek(self, pos: int, whence: int = 0) -> int:
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def seek(self, pos, whence = 0):
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"""Change stream position.
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Change the stream position to byte offset offset. offset is
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@ -309,11 +309,11 @@ class IOBase(metaclass=abc.ABCMeta):
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"""
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self._unsupported("seek")
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def tell(self) -> int:
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def tell(self):
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"""Return current stream position."""
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return self.seek(0, 1)
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def truncate(self, pos: int = None) -> int:
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def truncate(self, pos = None):
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"""Truncate file to size bytes.
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Size defaults to the current IO position as reported by tell(). Return
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@ -323,7 +323,7 @@ class IOBase(metaclass=abc.ABCMeta):
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### Flush and close ###
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def flush(self) -> None:
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def flush(self):
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"""Flush write buffers, if applicable.
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This is not implemented for read-only and non-blocking streams.
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@ -333,7 +333,7 @@ class IOBase(metaclass=abc.ABCMeta):
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__closed = False
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def close(self) -> None:
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def close(self):
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"""Flush and close the IO object.
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This method has no effect if the file is already closed.
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@ -342,7 +342,7 @@ class IOBase(metaclass=abc.ABCMeta):
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self.flush()
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self.__closed = True
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def __del__(self) -> None:
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def __del__(self):
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"""Destructor. Calls close()."""
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# The try/except block is in case this is called at program
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# exit time, when it's possible that globals have already been
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@ -356,7 +356,7 @@ class IOBase(metaclass=abc.ABCMeta):
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### Inquiries ###
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def seekable(self) -> bool:
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def seekable(self):
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"""Return whether object supports random access.
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If False, seek(), tell() and truncate() will raise UnsupportedOperation.
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@ -371,7 +371,7 @@ class IOBase(metaclass=abc.ABCMeta):
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raise UnsupportedOperation("File or stream is not seekable."
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if msg is None else msg)
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def readable(self) -> bool:
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def readable(self):
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"""Return whether object was opened for reading.
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If False, read() will raise UnsupportedOperation.
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@ -385,7 +385,7 @@ class IOBase(metaclass=abc.ABCMeta):
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raise UnsupportedOperation("File or stream is not readable."
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if msg is None else msg)
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def writable(self) -> bool:
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def writable(self):
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"""Return whether object was opened for writing.
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If False, write() and truncate() will raise UnsupportedOperation.
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@ -416,12 +416,12 @@ class IOBase(metaclass=abc.ABCMeta):
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### Context manager ###
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def __enter__(self) -> "IOBase": # That's a forward reference
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def __enter__(self): # That's a forward reference
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"""Context management protocol. Returns self."""
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self._checkClosed()
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return self
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def __exit__(self, *args) -> None:
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def __exit__(self, *args):
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"""Context management protocol. Calls close()"""
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self.close()
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@ -429,14 +429,14 @@ class IOBase(metaclass=abc.ABCMeta):
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# XXX Should these be present even if unimplemented?
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def fileno(self) -> int:
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def fileno(self):
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"""Returns underlying file descriptor if one exists.
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An IOError is raised if the IO object does not use a file descriptor.
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"""
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self._unsupported("fileno")
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def isatty(self) -> bool:
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def isatty(self):
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"""Return whether this is an 'interactive' stream.
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Return False if it can't be determined.
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@ -446,7 +446,7 @@ class IOBase(metaclass=abc.ABCMeta):
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### Readline[s] and writelines ###
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def readline(self, limit: int = -1) -> bytes:
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def readline(self, limit = -1):
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r"""Read and return a line from the stream.
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If limit is specified, at most limit bytes will be read.
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@ -532,7 +532,7 @@ class RawIOBase(IOBase):
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# primitive operation, but that would lead to nasty recursion in case
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# a subclass doesn't implement either.)
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def read(self, n: int = -1) -> bytes:
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def read(self, n = -1):
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"""Read and return up to n bytes.
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Returns an empty bytes object on EOF, or None if the object is
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@ -559,7 +559,7 @@ class RawIOBase(IOBase):
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res += data
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return bytes(res)
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def readinto(self, b: bytearray) -> int:
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def readinto(self, b):
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"""Read up to len(b) bytes into b.
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Returns number of bytes read (0 for EOF), or None if the object
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@ -567,7 +567,7 @@ class RawIOBase(IOBase):
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"""
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self._unsupported("readinto")
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def write(self, b: bytes) -> int:
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def write(self, b):
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"""Write the given buffer to the IO stream.
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Returns the number of bytes written, which may be less than len(b).
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@ -596,7 +596,7 @@ class BufferedIOBase(IOBase):
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implementation, but wrap one.
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"""
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def read(self, n: int = None) -> bytes:
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def read(self, n = None):
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"""Read and return up to n bytes.
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If the argument is omitted, None, or negative, reads and
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@ -616,11 +616,11 @@ class BufferedIOBase(IOBase):
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"""
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self._unsupported("read")
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def read1(self, n: int=None) -> bytes:
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def read1(self, n = None):
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"""Read up to n bytes with at most one read() system call."""
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self._unsupported("read1")
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def readinto(self, b: bytearray) -> int:
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def readinto(self, b):
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"""Read up to len(b) bytes into b.
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Like read(), this may issue multiple reads to the underlying raw
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@ -643,7 +643,7 @@ class BufferedIOBase(IOBase):
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b[:n] = array.array('b', data)
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return n
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def write(self, b: bytes) -> int:
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def write(self, b):
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"""Write the given buffer to the IO stream.
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Return the number of bytes written, which is never less than
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@ -654,7 +654,7 @@ class BufferedIOBase(IOBase):
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"""
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self._unsupported("write")
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def detach(self) -> None:
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def detach(self):
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"""
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Separate the underlying raw stream from the buffer and return it.
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@ -1272,7 +1272,7 @@ class TextIOBase(IOBase):
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are immutable. There is no public constructor.
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"""
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def read(self, n: int = -1) -> str:
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def read(self, n = -1):
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"""Read at most n characters from stream.
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Read from underlying buffer until we have n characters or we hit EOF.
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@ -1280,22 +1280,22 @@ class TextIOBase(IOBase):
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"""
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self._unsupported("read")
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def write(self, s: str) -> int:
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def write(self, s):
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"""Write string s to stream."""
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self._unsupported("write")
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def truncate(self, pos: int = None) -> int:
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def truncate(self, pos = None):
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"""Truncate size to pos."""
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self._unsupported("truncate")
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def readline(self) -> str:
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def readline(self):
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"""Read until newline or EOF.
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Returns an empty string if EOF is hit immediately.
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"""
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self._unsupported("readline")
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def detach(self) -> None:
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def detach(self):
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"""
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Separate the underlying buffer from the TextIOBase and return it.
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@ -43,6 +43,9 @@ Core and Builtins
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Library
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-------
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- Issue #10899: No function type annotations in the standard library.
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Removed function type annotations from _pyio.py.
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- Issue #10875: Update Regular Expression HOWTO; patch by 'SilentGhost'.
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- Issue #10872: The repr() of TextIOWrapper objects now includes the mode
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