mirror of https://github.com/python/cpython
630 lines
27 KiB
ReStructuredText
630 lines
27 KiB
ReStructuredText
|
|
:mod:`inspect` --- Inspect live objects
|
|
=======================================
|
|
|
|
.. module:: inspect
|
|
:synopsis: Extract information and source code from live objects.
|
|
.. moduleauthor:: Ka-Ping Yee <ping@lfw.org>
|
|
.. sectionauthor:: Ka-Ping Yee <ping@lfw.org>
|
|
|
|
|
|
.. versionadded:: 2.1
|
|
|
|
The :mod:`inspect` module provides several useful functions to help get
|
|
information about live objects such as modules, classes, methods, functions,
|
|
tracebacks, frame objects, and code objects. For example, it can help you
|
|
examine the contents of a class, retrieve the source code of a method, extract
|
|
and format the argument list for a function, or get all the information you need
|
|
to display a detailed traceback.
|
|
|
|
There are four main kinds of services provided by this module: type checking,
|
|
getting source code, inspecting classes and functions, and examining the
|
|
interpreter stack.
|
|
|
|
|
|
.. _inspect-types:
|
|
|
|
Types and members
|
|
-----------------
|
|
|
|
The :func:`getmembers` function retrieves the members of an object such as a
|
|
class or module. The sixteen functions whose names begin with "is" are mainly
|
|
provided as convenient choices for the second argument to :func:`getmembers`.
|
|
They also help you determine when you can expect to find the following special
|
|
attributes:
|
|
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| Type | Attribute | Description | Notes |
|
|
+===========+=================+===========================+=======+
|
|
| module | __doc__ | documentation string | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | __file__ | filename (missing for | |
|
|
| | | built-in modules) | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| class | __doc__ | documentation string | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | __module__ | name of module in which | |
|
|
| | | this class was defined | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| method | __doc__ | documentation string | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | __name__ | name with which this | |
|
|
| | | method was defined | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | im_class | class object that asked | \(1) |
|
|
| | | for this method | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | im_func or | function object | |
|
|
| | __func__ | containing implementation | |
|
|
| | | of method | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | im_self or | instance to which this | |
|
|
| | __self__ | method is bound, or | |
|
|
| | | ``None`` | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| function | __doc__ | documentation string | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | __name__ | name with which this | |
|
|
| | | function was defined | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | func_code | code object containing | |
|
|
| | | compiled function | |
|
|
| | | :term:`bytecode` | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | func_defaults | tuple of any default | |
|
|
| | | values for arguments | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | func_doc | (same as __doc__) | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | func_globals | global namespace in which | |
|
|
| | | this function was defined | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | func_name | (same as __name__) | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| generator | __iter__ | defined to support | |
|
|
| | | iteration over container | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | close | raises new GeneratorExit | |
|
|
| | | exception inside the | |
|
|
| | | generator to terminate | |
|
|
| | | the iteration | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | gi_code | code object | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | gi_frame | frame object or possibly | |
|
|
| | | None once the generator | |
|
|
| | | has been exhausted | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | gi_running | set to 1 when generator | |
|
|
| | | is executing, 0 otherwise | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | next | return the next item from | |
|
|
| | | the container | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | send | resumes the generator and | |
|
|
| | | "sends" a value that | |
|
|
| | | becomes the result of the | |
|
|
| | | current yield-expression | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | throw | used to raise an | |
|
|
| | | exception inside the | |
|
|
| | | generator | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| traceback | tb_frame | frame object at this | |
|
|
| | | level | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | tb_lasti | index of last attempted | |
|
|
| | | instruction in bytecode | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | tb_lineno | current line number in | |
|
|
| | | Python source code | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | tb_next | next inner traceback | |
|
|
| | | object (called by this | |
|
|
| | | level) | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| frame | f_back | next outer frame object | |
|
|
| | | (this frame's caller) | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_builtins | builtins namespace seen | |
|
|
| | | by this frame | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_code | code object being | |
|
|
| | | executed in this frame | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_exc_traceback | traceback if raised in | |
|
|
| | | this frame, or ``None`` | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_exc_type | exception type if raised | |
|
|
| | | in this frame, or | |
|
|
| | | ``None`` | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_exc_value | exception value if raised | |
|
|
| | | in this frame, or | |
|
|
| | | ``None`` | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_globals | global namespace seen by | |
|
|
| | | this frame | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_lasti | index of last attempted | |
|
|
| | | instruction in bytecode | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_lineno | current line number in | |
|
|
| | | Python source code | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_locals | local namespace seen by | |
|
|
| | | this frame | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_restricted | 0 or 1 if frame is in | |
|
|
| | | restricted execution mode | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | f_trace | tracing function for this | |
|
|
| | | frame, or ``None`` | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| code | co_argcount | number of arguments (not | |
|
|
| | | including \* or \*\* | |
|
|
| | | args) | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_code | string of raw compiled | |
|
|
| | | bytecode | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_consts | tuple of constants used | |
|
|
| | | in the bytecode | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_filename | name of file in which | |
|
|
| | | this code object was | |
|
|
| | | created | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_firstlineno | number of first line in | |
|
|
| | | Python source code | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_flags | bitmap: 1=optimized ``|`` | |
|
|
| | | 2=newlocals ``|`` 4=\*arg | |
|
|
| | | ``|`` 8=\*\*arg | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_lnotab | encoded mapping of line | |
|
|
| | | numbers to bytecode | |
|
|
| | | indices | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_name | name with which this code | |
|
|
| | | object was defined | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_names | tuple of names of local | |
|
|
| | | variables | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_nlocals | number of local variables | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_stacksize | virtual machine stack | |
|
|
| | | space required | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | co_varnames | tuple of names of | |
|
|
| | | arguments and local | |
|
|
| | | variables | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| builtin | __doc__ | documentation string | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | __name__ | original name of this | |
|
|
| | | function or method | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
| | __self__ | instance to which a | |
|
|
| | | method is bound, or | |
|
|
| | | ``None`` | |
|
|
+-----------+-----------------+---------------------------+-------+
|
|
|
|
Note:
|
|
|
|
(1)
|
|
.. versionchanged:: 2.2
|
|
:attr:`im_class` used to refer to the class that defined the method.
|
|
|
|
|
|
.. function:: getmembers(object[, predicate])
|
|
|
|
Return all the members of an object in a list of (name, value) pairs sorted by
|
|
name. If the optional *predicate* argument is supplied, only members for which
|
|
the predicate returns a true value are included.
|
|
|
|
.. note::
|
|
|
|
:func:`getmembers` does not return metaclass attributes when the argument
|
|
is a class (this behavior is inherited from the :func:`dir` function).
|
|
|
|
|
|
.. function:: getmoduleinfo(path)
|
|
|
|
Return a tuple of values that describe how Python will interpret the file
|
|
identified by *path* if it is a module, or ``None`` if it would not be
|
|
identified as a module. The return tuple is ``(name, suffix, mode,
|
|
module_type)``, where *name* is the name of the module without the name of
|
|
any enclosing package, *suffix* is the trailing part of the file name (which
|
|
may not be a dot-delimited extension), *mode* is the :func:`open` mode that
|
|
would be used (``'r'`` or ``'rb'``), and *module_type* is an integer giving
|
|
the type of the module. *module_type* will have a value which can be
|
|
compared to the constants defined in the :mod:`imp` module; see the
|
|
documentation for that module for more information on module types.
|
|
|
|
.. versionchanged:: 2.6
|
|
Returns a :term:`named tuple` ``ModuleInfo(name, suffix, mode,
|
|
module_type)``.
|
|
|
|
|
|
.. function:: getmodulename(path)
|
|
|
|
Return the name of the module named by the file *path*, without including the
|
|
names of enclosing packages. This uses the same algorithm as the interpreter
|
|
uses when searching for modules. If the name cannot be matched according to the
|
|
interpreter's rules, ``None`` is returned.
|
|
|
|
|
|
.. function:: ismodule(object)
|
|
|
|
Return true if the object is a module.
|
|
|
|
|
|
.. function:: isclass(object)
|
|
|
|
Return true if the object is a class, whether built-in or created in Python
|
|
code.
|
|
|
|
|
|
.. function:: ismethod(object)
|
|
|
|
Return true if the object is a bound method written in Python.
|
|
|
|
|
|
.. function:: isfunction(object)
|
|
|
|
Return true if the object is a Python function, which includes functions
|
|
created by a :term:`lambda` expression.
|
|
|
|
|
|
.. function:: isgeneratorfunction(object)
|
|
|
|
Return true if the object is a Python generator function.
|
|
|
|
.. versionadded:: 2.6
|
|
|
|
|
|
.. function:: isgenerator(object)
|
|
|
|
Return true if the object is a generator.
|
|
|
|
.. versionadded:: 2.6
|
|
|
|
|
|
.. function:: istraceback(object)
|
|
|
|
Return true if the object is a traceback.
|
|
|
|
|
|
.. function:: isframe(object)
|
|
|
|
Return true if the object is a frame.
|
|
|
|
|
|
.. function:: iscode(object)
|
|
|
|
Return true if the object is a code.
|
|
|
|
|
|
.. function:: isbuiltin(object)
|
|
|
|
Return true if the object is a built-in function or a bound built-in method.
|
|
|
|
|
|
.. function:: isroutine(object)
|
|
|
|
Return true if the object is a user-defined or built-in function or method.
|
|
|
|
|
|
.. function:: isabstract(object)
|
|
|
|
Return true if the object is an abstract base class.
|
|
|
|
.. versionadded:: 2.6
|
|
|
|
|
|
.. function:: ismethoddescriptor(object)
|
|
|
|
Return true if the object is a method descriptor, but not if
|
|
:func:`ismethod`, :func:`isclass`, :func:`isfunction` or :func:`isbuiltin`
|
|
are true.
|
|
|
|
This is new as of Python 2.2, and, for example, is true of
|
|
``int.__add__``. An object passing this test has a :attr:`__get__` attribute
|
|
but not a :attr:`__set__` attribute, but beyond that the set of attributes
|
|
varies. :attr:`__name__` is usually sensible, and :attr:`__doc__` often is.
|
|
|
|
Methods implemented via descriptors that also pass one of the other tests
|
|
return false from the :func:`ismethoddescriptor` test, simply because the
|
|
other tests promise more -- you can, e.g., count on having the
|
|
:attr:`im_func` attribute (etc) when an object passes :func:`ismethod`.
|
|
|
|
|
|
.. function:: isdatadescriptor(object)
|
|
|
|
Return true if the object is a data descriptor.
|
|
|
|
Data descriptors have both a :attr:`__get__` and a :attr:`__set__` attribute.
|
|
Examples are properties (defined in Python), getsets, and members. The
|
|
latter two are defined in C and there are more specific tests available for
|
|
those types, which is robust across Python implementations. Typically, data
|
|
descriptors will also have :attr:`__name__` and :attr:`__doc__` attributes
|
|
(properties, getsets, and members have both of these attributes), but this is
|
|
not guaranteed.
|
|
|
|
.. versionadded:: 2.3
|
|
|
|
|
|
.. function:: isgetsetdescriptor(object)
|
|
|
|
Return true if the object is a getset descriptor.
|
|
|
|
.. impl-detail::
|
|
|
|
getsets are attributes defined in extension modules via
|
|
:ctype:`PyGetSetDef` structures. For Python implementations without such
|
|
types, this method will always return ``False``.
|
|
|
|
.. versionadded:: 2.5
|
|
|
|
|
|
.. function:: ismemberdescriptor(object)
|
|
|
|
Return true if the object is a member descriptor.
|
|
|
|
.. impl-detail::
|
|
|
|
Member descriptors are attributes defined in extension modules via
|
|
:ctype:`PyMemberDef` structures. For Python implementations without such
|
|
types, this method will always return ``False``.
|
|
|
|
.. versionadded:: 2.5
|
|
|
|
|
|
.. _inspect-source:
|
|
|
|
Retrieving source code
|
|
----------------------
|
|
|
|
.. function:: getdoc(object)
|
|
|
|
Get the documentation string for an object, cleaned up with :func:`cleandoc`.
|
|
|
|
|
|
.. function:: getcomments(object)
|
|
|
|
Return in a single string any lines of comments immediately preceding the
|
|
object's source code (for a class, function, or method), or at the top of the
|
|
Python source file (if the object is a module).
|
|
|
|
|
|
.. function:: getfile(object)
|
|
|
|
Return the name of the (text or binary) file in which an object was defined.
|
|
This will fail with a :exc:`TypeError` if the object is a built-in module,
|
|
class, or function.
|
|
|
|
|
|
.. function:: getmodule(object)
|
|
|
|
Try to guess which module an object was defined in.
|
|
|
|
|
|
.. function:: getsourcefile(object)
|
|
|
|
Return the name of the Python source file in which an object was defined. This
|
|
will fail with a :exc:`TypeError` if the object is a built-in module, class, or
|
|
function.
|
|
|
|
|
|
.. function:: getsourcelines(object)
|
|
|
|
Return a list of source lines and starting line number for an object. The
|
|
argument may be a module, class, method, function, traceback, frame, or code
|
|
object. The source code is returned as a list of the lines corresponding to the
|
|
object and the line number indicates where in the original source file the first
|
|
line of code was found. An :exc:`IOError` is raised if the source code cannot
|
|
be retrieved.
|
|
|
|
|
|
.. function:: getsource(object)
|
|
|
|
Return the text of the source code for an object. The argument may be a module,
|
|
class, method, function, traceback, frame, or code object. The source code is
|
|
returned as a single string. An :exc:`IOError` is raised if the source code
|
|
cannot be retrieved.
|
|
|
|
|
|
.. function:: cleandoc(doc)
|
|
|
|
Clean up indentation from docstrings that are indented to line up with blocks
|
|
of code. Any whitespace that can be uniformly removed from the second line
|
|
onwards is removed. Also, all tabs are expanded to spaces.
|
|
|
|
.. versionadded:: 2.6
|
|
|
|
|
|
.. _inspect-classes-functions:
|
|
|
|
Classes and functions
|
|
---------------------
|
|
|
|
|
|
.. function:: getclasstree(classes[, unique])
|
|
|
|
Arrange the given list of classes into a hierarchy of nested lists. Where a
|
|
nested list appears, it contains classes derived from the class whose entry
|
|
immediately precedes the list. Each entry is a 2-tuple containing a class and a
|
|
tuple of its base classes. If the *unique* argument is true, exactly one entry
|
|
appears in the returned structure for each class in the given list. Otherwise,
|
|
classes using multiple inheritance and their descendants will appear multiple
|
|
times.
|
|
|
|
|
|
.. function:: getargspec(func)
|
|
|
|
Get the names and default values of a Python function's arguments. A tuple of
|
|
four things is returned: ``(args, varargs, keywords, defaults)``. *args* is a
|
|
list of the argument names (it may contain nested lists). *varargs* and
|
|
*keywords* are the names of the ``*`` and ``**`` arguments or
|
|
``None``. *defaults* is a tuple of default argument values or None if there
|
|
are no default arguments; if this tuple has *n* elements, they correspond to
|
|
the last *n* elements listed in *args*.
|
|
|
|
.. versionchanged:: 2.6
|
|
Returns a :term:`named tuple` ``ArgSpec(args, varargs, keywords,
|
|
defaults)``.
|
|
|
|
|
|
.. function:: getargvalues(frame)
|
|
|
|
Get information about arguments passed into a particular frame. A tuple of
|
|
four things is returned: ``(args, varargs, keywords, locals)``. *args* is a
|
|
list of the argument names (it may contain nested lists). *varargs* and
|
|
*keywords* are the names of the ``*`` and ``**`` arguments or ``None``.
|
|
*locals* is the locals dictionary of the given frame.
|
|
|
|
.. versionchanged:: 2.6
|
|
Returns a :term:`named tuple` ``ArgInfo(args, varargs, keywords,
|
|
locals)``.
|
|
|
|
|
|
.. function:: formatargspec(args[, varargs, varkw, defaults, formatarg, formatvarargs, formatvarkw, formatvalue, join])
|
|
|
|
Format a pretty argument spec from the four values returned by
|
|
:func:`getargspec`. The format\* arguments are the corresponding optional
|
|
formatting functions that are called to turn names and values into strings.
|
|
|
|
|
|
.. function:: formatargvalues(args[, varargs, varkw, locals, formatarg, formatvarargs, formatvarkw, formatvalue, join])
|
|
|
|
Format a pretty argument spec from the four values returned by
|
|
:func:`getargvalues`. The format\* arguments are the corresponding optional
|
|
formatting functions that are called to turn names and values into strings.
|
|
|
|
|
|
.. function:: getmro(cls)
|
|
|
|
Return a tuple of class cls's base classes, including cls, in method resolution
|
|
order. No class appears more than once in this tuple. Note that the method
|
|
resolution order depends on cls's type. Unless a very peculiar user-defined
|
|
metatype is in use, cls will be the first element of the tuple.
|
|
|
|
|
|
.. function:: getcallargs(func[, *args][, **kwds])
|
|
|
|
Bind the *args* and *kwds* to the argument names of the Python function or
|
|
method *func*, as if it was called with them. For bound methods, bind also the
|
|
first argument (typically named ``self``) to the associated instance. A dict
|
|
is returned, mapping the argument names (including the names of the ``*`` and
|
|
``**`` arguments, if any) to their values from *args* and *kwds*. In case of
|
|
invoking *func* incorrectly, i.e. whenever ``func(*args, **kwds)`` would raise
|
|
an exception because of incompatible signature, an exception of the same type
|
|
and the same or similar message is raised. For example::
|
|
|
|
>>> from inspect import getcallargs
|
|
>>> def f(a, b=1, *pos, **named):
|
|
... pass
|
|
>>> getcallargs(f, 1, 2, 3)
|
|
{'a': 1, 'named': {}, 'b': 2, 'pos': (3,)}
|
|
>>> getcallargs(f, a=2, x=4)
|
|
{'a': 2, 'named': {'x': 4}, 'b': 1, 'pos': ()}
|
|
>>> getcallargs(f)
|
|
Traceback (most recent call last):
|
|
...
|
|
TypeError: f() takes at least 1 argument (0 given)
|
|
|
|
.. versionadded:: 2.7
|
|
|
|
|
|
.. _inspect-stack:
|
|
|
|
The interpreter stack
|
|
---------------------
|
|
|
|
When the following functions return "frame records," each record is a tuple of
|
|
six items: the frame object, the filename, the line number of the current line,
|
|
the function name, a list of lines of context from the source code, and the
|
|
index of the current line within that list.
|
|
|
|
.. note::
|
|
|
|
Keeping references to frame objects, as found in the first element of the frame
|
|
records these functions return, can cause your program to create reference
|
|
cycles. Once a reference cycle has been created, the lifespan of all objects
|
|
which can be accessed from the objects which form the cycle can become much
|
|
longer even if Python's optional cycle detector is enabled. If such cycles must
|
|
be created, it is important to ensure they are explicitly broken to avoid the
|
|
delayed destruction of objects and increased memory consumption which occurs.
|
|
|
|
Though the cycle detector will catch these, destruction of the frames (and local
|
|
variables) can be made deterministic by removing the cycle in a
|
|
:keyword:`finally` clause. This is also important if the cycle detector was
|
|
disabled when Python was compiled or using :func:`gc.disable`. For example::
|
|
|
|
def handle_stackframe_without_leak():
|
|
frame = inspect.currentframe()
|
|
try:
|
|
# do something with the frame
|
|
finally:
|
|
del frame
|
|
|
|
The optional *context* argument supported by most of these functions specifies
|
|
the number of lines of context to return, which are centered around the current
|
|
line.
|
|
|
|
|
|
.. function:: getframeinfo(frame[, context])
|
|
|
|
Get information about a frame or traceback object. A 5-tuple is returned, the
|
|
last five elements of the frame's frame record.
|
|
|
|
.. versionchanged:: 2.6
|
|
Returns a :term:`named tuple` ``Traceback(filename, lineno, function,
|
|
code_context, index)``.
|
|
|
|
|
|
.. function:: getouterframes(frame[, context])
|
|
|
|
Get a list of frame records for a frame and all outer frames. These frames
|
|
represent the calls that lead to the creation of *frame*. The first entry in the
|
|
returned list represents *frame*; the last entry represents the outermost call
|
|
on *frame*'s stack.
|
|
|
|
|
|
.. function:: getinnerframes(traceback[, context])
|
|
|
|
Get a list of frame records for a traceback's frame and all inner frames. These
|
|
frames represent calls made as a consequence of *frame*. The first entry in the
|
|
list represents *traceback*; the last entry represents where the exception was
|
|
raised.
|
|
|
|
|
|
.. function:: currentframe()
|
|
|
|
Return the frame object for the caller's stack frame.
|
|
|
|
.. impl-detail::
|
|
|
|
This function relies on Python stack frame support in the interpreter,
|
|
which isn't guaranteed to exist in all implementations of Python. If
|
|
running in an implementation without Python stack frame support this
|
|
function returns ``None``.
|
|
|
|
|
|
.. function:: stack([context])
|
|
|
|
Return a list of frame records for the caller's stack. The first entry in the
|
|
returned list represents the caller; the last entry represents the outermost
|
|
call on the stack.
|
|
|
|
|
|
.. function:: trace([context])
|
|
|
|
Return a list of frame records for the stack between the current frame and the
|
|
frame in which an exception currently being handled was raised in. The first
|
|
entry in the list represents the caller; the last entry represents where the
|
|
exception was raised.
|
|
|