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This module encapsulates the interface provided by the internal special
attributes (co_*, im_*, tb_*, etc.) in a friendlier fashion.
It also provides some help for examining source code and class layout.
Here are some of the useful functions provided by this module:
ismodule(), isclass(), ismethod(), isfunction(), isgeneratorfunction(),
isgenerator(), istraceback(), isframe(), iscode(), isbuiltin(),
isroutine() - check object types
getmembers() - get members of an object that satisfy a given condition
getfile(), getsourcefile(), getsource() - find an object's source code
getdoc(), getcomments() - get documentation on an object
getmodule() - determine the module that an object came from
getclasstree() - arrange classes so as to represent their hierarchy
getargvalues(), getcallargs() - get info about function arguments
getfullargspec() - same, with support for Python 3 features
formatargspec(), formatargvalues() - format an argument spec
getouterframes(), getinnerframes() - get info about frames
currentframe() - get the current stack frame
stack(), trace() - get info about frames on the stack or in a traceback
signature() - get a Signature object for the callable
Ka-Ping Yee <ping@lfw.org>'Yury Selivanov <yselivanov@sprymix.com> N)
attrgetter)
namedtuple OrderedDictZCO_ c C s t | tjS )zReturn true if the object is a module.
Module objects provide these attributes:
__cached__ pathname to byte compiled file
__doc__ documentation string
__file__ filename (missing for built-in modules))
isinstancetypes
ModuleType)object r
/usr/lib64/python3.6/inspect.pyismodule@ s r c C s
t | tS )zReturn true if the object is a class.
Class objects provide these attributes:
__doc__ documentation string
__module__ name of module in which this class was defined)r type)r r
r
r isclassI s r c C s t | tjS )a_ Return true if the object is an instance method.
Instance method objects provide these attributes:
__doc__ documentation string
__name__ name with which this method was defined
__func__ function object containing implementation of method
__self__ instance to which this method is bound)r r
MethodType)r r
r
r ismethodQ s r c C s: t | st| st| r dS t| }t|do8t|d S )a Return true if the object is a method descriptor.
But not if ismethod() or isclass() or isfunction() are true.
This is new in Python 2.2, and, for example, is true of int.__add__.
An object passing this test has a __get__ attribute but not a __set__
attribute, but beyond that the set of attributes varies. __name__ is
usually sensible, and __doc__ often is.
Methods implemented via descriptors that also pass one of the other
tests return false from the ismethoddescriptor() test, simply because
the other tests promise more -- you can, e.g., count on having the
__func__ attribute (etc) when an object passes ismethod().F__get____set__)r r
isfunctionr hasattr)r tpr
r
r ismethoddescriptor[ s r c C s8 t | st| st| r dS t| }t|do6t|dS )a Return true if the object is a data descriptor.
Data descriptors have both a __get__ and a __set__ attribute. Examples are
properties (defined in Python) and getsets and members (defined in C).
Typically, data descriptors will also have __name__ and __doc__ attributes
(properties, getsets, and members have both of these attributes), but this
is not guaranteed.Fr r )r r r r r )r r r
r
r isdatadescriptoro s r MemberDescriptorTypec C s t | tjS )zReturn true if the object is a member descriptor.
Member descriptors are specialized descriptors defined in extension
modules.)r r
r )r r
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r ismemberdescriptor s r c C s dS )zReturn true if the object is a member descriptor.
Member descriptors are specialized descriptors defined in extension
modules.Fr
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r r s GetSetDescriptorTypec C s t | tjS )zReturn true if the object is a getset descriptor.
getset descriptors are specialized descriptors defined in extension
modules.)r r
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r isgetsetdescriptor s r c C s dS )zReturn true if the object is a getset descriptor.
getset descriptors are specialized descriptors defined in extension
modules.Fr
)r r
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r r s c C s t | tjS )a( Return true if the object is a user-defined function.
Function objects provide these attributes:
__doc__ documentation string
__name__ name with which this function was defined
__code__ code object containing compiled function bytecode
__defaults__ tuple of any default values for arguments
__globals__ global namespace in which this function was defined
__annotations__ dict of parameter annotations
__kwdefaults__ dict of keyword only parameters with defaults)r r
FunctionType)r r
r
r r s r c C s t t| st| o | jjt@ S )zReturn true if the object is a user-defined generator function.
Generator function objects provide the same attributes as functions.
See help(isfunction) for a list of attributes.)boolr r __code__co_flagsZ CO_GENERATOR)r r
r
r isgeneratorfunction s r# c C s t t| st| o | jjt@ S )zuReturn true if the object is a coroutine function.
Coroutine functions are defined with "async def" syntax.
)r r r r! r" Z CO_COROUTINE)r r
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r iscoroutinefunction s r$ c C s t t| st| o | jjt@ S )zReturn true if the object is an asynchronous generator function.
Asynchronous generator functions are defined with "async def"
syntax and have "yield" expressions in their body.
)r r r r! r" ZCO_ASYNC_GENERATOR)r r
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r isasyncgenfunction s r% c C s t | tjS )z7Return true if the object is an asynchronous generator.)r r
AsyncGeneratorType)r r
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isasyncgen s r' c C s t | tjS )a Return true if the object is a generator.
Generator objects provide these attributes:
__iter__ defined to support iteration over container
close raises a 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)r r
GeneratorType)r r
r
r isgenerator s r) c C s t | tjS )z)Return true if the object is a coroutine.)r r
CoroutineType)r r
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r iscoroutine s r+ c C s6 t | tjp4t | tjr(t| jjt@ p4t | tj j
S )z?Return true if object can be passed to an ``await`` expression.) r r
r* r( r gi_coder" ZCO_ITERABLE_COROUTINE collectionsabc Awaitable)r r
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r isawaitable s r0 c C s t | tjS )ab Return true if the object is a traceback.
Traceback objects provide these attributes:
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))r r
TracebackType)r r
r
r istraceback s r2 c C s t | tjS )a` Return true if the object is a frame object.
Frame objects provide these attributes:
f_back next outer frame object (this frame's caller)
f_builtins built-in namespace seen by this frame
f_code code object being executed in this frame
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_trace tracing function for this frame, or None)r r
FrameType)r r
r
r isframe s r4 c C s t | tjS )aE Return true if the object is a code object.
Code objects provide these attributes:
co_argcount number of arguments (not including *, ** args
or keyword only arguments)
co_code string of raw compiled bytecode
co_cellvars tuple of names of cell variables
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
| 16=nested | 32=generator | 64=nofree | 128=coroutine
| 256=iterable_coroutine | 512=async_generator
co_freevars tuple of names of free variables
co_kwonlyargcount number of keyword only arguments (not including ** 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)r r
CodeType)r r
r
r iscode s r6 c C s t | tjS )a, Return true if the object is a built-in function or method.
Built-in functions and methods provide these attributes:
__doc__ documentation string
__name__ original name of this function or method
__self__ instance to which a method is bound, or None)r r
BuiltinFunctionType)r r
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r isbuiltin s r8 c C s t | p t| p t| p t| S )z<Return true if the object is any kind of function or method.)r8 r r r )r r
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| qW |jdd d |S )zReturn all members of an object as (name, value) pairs sorted by name.
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j| qW | S ) aN Return list of attribute-descriptor tuples.
For each name in dir(cls), the return list contains a 4-tuple
with these elements:
0. The name (a string).
1. The kind of attribute this is, one of these strings:
'class method' created via classmethod()
'static method' created via staticmethod()
'property' created via property()
'method' any other flavor of method or descriptor
'data' not a method
2. The class which defined this attribute (a class).
3. The object as obtained by calling getattr; if this fails, or if the
resulting object does not live anywhere in the class' mro (including
metaclasses) then the object is looked up in the defining class's
dict (found by walking the mro).
If one of the items in dir(cls) is stored in the metaclass it will now
be discovered and not have None be listed as the class in which it was
defined. Any items whose home class cannot be discovered are skipped.
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rj c C s | j S )zHReturn tuple of base classes (including cls) in method resolution order.)__mro__)r[ r
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r rJ s rJ )stopc s dkrdd }n fdd}| }t ||i}tj }xD|| rz| j} t | }||ksbt||krptdj|| ||< q8W | S )an Get the object wrapped by *func*.
Follows the chain of :attr:`__wrapped__` attributes returning the last
object in the chain.
*stop* is an optional callback accepting an object in the wrapper chain
as its sole argument that allows the unwrapping to be terminated early if
the callback returns a true value. If the callback never returns a true
value, the last object in the chain is returned as usual. For example,
:func:`signature` uses this to stop unwrapping if any object in the
chain has a ``__signature__`` attribute defined.
:exc:`ValueError` is raised if a cycle is encountered.
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rx c C s | j }t|t|j S )zBReturn the indent size, in spaces, at the start of a line of text.)
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indentsize s r| c C sR t jj| j}|d krd S x&| jjdd d D ]}t||}q0W t|sNd S |S )N.r )rq modulesget
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r wY nX |d k r|S qW d S )N__func__r} )r rk r __doc__rO r r __name____self__rB __class__r r r8 r r r^ fgetr r r] )rh rF docrD selfr[ rv r
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rL dS X t|ts\dS t|S )zGet the documentation string for an object.
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indented to line up with blocks of code, any whitespace than can be
uniformly removed from the second line onwards is removed.N)r rO r TypeErrorr strcleandoc)r r r
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r& dS X tj}x:|dd D ]*}t|j }|r<t|| }t||}q<W |r~|d j |d< |tjk rx*tdt|D ]}|| |d ||< qW x|r|d r|j qW x |r|d r|j d qW dj
|S dS )zClean up indentation from docstrings.
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Nr r r~ ) ry r UnicodeErrorrq maxsizers rz minrangepopjoin)r linesZmarginr{ Zcontentindentir
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} t| r| j} t| r| j} t| r| jS tdj| dS )z@Work out which source or compiled file an object was defined in.__file__z{!r} is a built-in moduler z{!r} is a built-in classzO{!r} is not a module, class, method, function, traceback, frame, or code objectN)r r r r ru r rq r r r r r r r! r2 tb_framer4 f_coder6 co_filename)r r
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r c C sT t jj| }dd tjj D }|j x&|D ] \}}|j|r.|d| S q.W dS )z1Return the module name for a given file, or None.c S s g | ]}t | |fqS r
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| dddk r S tjkr S dS )zReturn the filename that can be used to locate an object's source.
Return None if no way can be identified to get the source.
Nc 3 s | ]} j |V qd S )N)r )rZ s)filenamer
r <genexpr> s z getsourcefile.<locals>.<genexpr>r c 3 s | ]} j |V qd S )N)r )rZ r )r r
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r c C s, |dkrt | pt| }tjjtjj|S )zReturn an absolute path to the source or compiled file for an object.
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normalizes the result as much as possible.N)r r r r normcaseabspath)r _filenamer
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} | | kr~|S dS )zAReturn the module an object was defined in, or None if not found.r Nr __main__r builtins)r r rq r r r
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}x*| dkr|j|| rP | d } qW || fS tddS )ab Return the entire source file and starting line number for an object.
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in the file and the line number indexes a line in that list. An OSError
is raised if the source code cannot be retrieved.<>zsource code not availablezcould not get source coder z^(\s*)class\s*z\bcr z could not find class definitionco_firstlinenoz"could not find function definitionz>^(\s*def\s)|(\s*async\s+def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)zcould not find code objectN) r r
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d< qW dj|S dS ) zwGet lines of comments immediately preceding an object's source code.
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r r n s r c @ s e Zd ZdZdd Zdd ZdS ) BlockFinderz@Provide a tokeneater() method to detect the end of a code block.c C s. d| _ d| _d| _d| _d| _d| _d| _d S )Nr Fr )r islambdastartedpassline indecoratordecoratorhasargslast)r r
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r __init__r s zBlockFinder.__init__c C s& | j rD| j rD|dkr d| _n |d kr<|dkr6d| _d| _ d| _n|dkrZ| jrXd| _n|dkrv| jrtd| _d| _n|tjkrd| _|d | _| jrt| jr| j rd| _nr| jrnj|tj kr| j
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rJ Y nX | d|j S )z@Extract the block of code at the top of the given list of lines.N) r r generate_tokensiter__next__r r IndentationErrorr )r Z blockfindertokensZ_tokenr
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r c C sb t | } t| \}}t| r"| j} t| s>t| rF| jjdkrF|dfS t||d |d fS dS )a Return a list of source lines and starting line number for an object.
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raised if the source code cannot be retrieved.z<module>r Nr ) rx r r2 r r r4 r co_namer )r r r r
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r getsourcelines s r c C s t | \}}dj|S )a Return the text of the source code for an object.
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r getsource s r c C sV g }| j tddd x:| D ]2}|j||jf ||kr |jt|| || q W |S )z-Recursive helper function for getclasstree().r r )rI )rQ r rN rC walktree)classeschildrenparentrS r r
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r Fc C s i }g }xn| D ]f}|j rbxZ|j D ]<}||kr4g ||< ||| krN|| j| |r || kr P q W q||kr|j| qW x |D ]}|| kr~|j| q~W t||dS )a Arrange the given list of classes into a hierarchy of nested lists.
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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
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