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This module encapsulates the interface provided by the internal special
attributes (func_*, 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(), 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
getargspec(), getargvalues() - get info about function arguments
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
s Ka-Ping Yee <ping@lfw.org>s
1 Jan 2001iN( t
attrgetterc C s t | t i S( s Return true if the object is a module.
Module objects provide these attributes:
__doc__ documentation string
__file__ filename (missing for built-in modules)( t
isinstancet typest
ModuleType( t object( ( s# /usr/local/lib/python2.5/inspect.pyt ismodule# s c C s t | t i p
t | d S( s Return true if the object is a class.
Class objects provide these attributes:
__doc__ documentation string
__module__ name of module in which this class was definedt __bases__( R R t ClassTypet hasattr( R ( ( s# /usr/local/lib/python2.5/inspect.pyt isclass+ s c C s t | t i S( s 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
im_class class object in which this method belongs
im_func function object containing implementation of method
im_self instance to which this method is bound, or None( R R t
MethodType( R ( ( s# /usr/local/lib/python2.5/inspect.pyt ismethod3 s c C sH t | d o8 t | d o' t | o t | o t | S( s 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
im_func attribute (etc) when an object passes ismethod().t __get__t __set__( R R t
isfunctionR ( R ( ( s# /usr/local/lib/python2.5/inspect.pyt ismethoddescriptor> s
c C s t | d o
t | d S( s 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.R
R ( R ( R ( ( s# /usr/local/lib/python2.5/inspect.pyt isdatadescriptorR s t MemberDescriptorTypec C s t | t i S( s Return true if the object is a member descriptor.
Member descriptors are specialized descriptors defined in extension
modules.( R R R ( R ( ( s# /usr/local/lib/python2.5/inspect.pyt ismemberdescriptor^ s c C s t S( s Return true if the object is a member descriptor.
Member descriptors are specialized descriptors defined in extension
modules.( t False( R ( ( s# /usr/local/lib/python2.5/inspect.pyR f s t GetSetDescriptorTypec C s t | t i S( s Return true if the object is a getset descriptor.
getset descriptors are specialized descriptors defined in extension
modules.( R R R ( R ( ( s# /usr/local/lib/python2.5/inspect.pyt isgetsetdescriptoro s c C s t S( s Return true if the object is a getset descriptor.
getset descriptors are specialized descriptors defined in extension
modules.( R ( R ( ( s# /usr/local/lib/python2.5/inspect.pyR w s c C s t | t i S( s 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
func_code code object containing compiled function 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__)( R R t FunctionType( R ( ( s# /usr/local/lib/python2.5/inspect.pyR ~ s c C s t | t i S( sb 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 t
TracebackType( R ( ( s# /usr/local/lib/python2.5/inspect.pyt istraceback s c C s t | t i S( s| 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_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( R R t FrameType( R ( ( s# /usr/local/lib/python2.5/inspect.pyt isframe s c C s t | t i S( su Return true if the object is a code object.
Code objects provide these attributes:
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( R R t CodeType( R ( ( s# /usr/local/lib/python2.5/inspect.pyt iscode s c C s t | t i S( s, 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 t BuiltinFunctionType( R ( ( s# /usr/local/lib/python2.5/inspect.pyt isbuiltin s c C s1 t | p$ t | p t | p
t | S( s< Return true if the object is any kind of function or method.( R R R R ( R ( ( s# /usr/local/lib/python2.5/inspect.pyt isroutine s
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| | o | i | | f q q W| i | S( s Return all members of an object as (name, value) pairs sorted by name.
Optionally, only return members that satisfy a given predicate.( t dirt getattrt appendt sort( R t predicatet resultst keyt value( ( s# /usr/local/lib/python2.5/inspect.pyt
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C s t | } t | } g } x[| D]S} | | i j o | i | } n t | | } t | d d } | d j o0 x- | D]! } | | i j o | } Pq q Wn | d j o! | | i j o | i | } n t | | } t | t o
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d } n d } | i | | | | f q% W| S( s 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
'data' not a method
2. The class which defined this attribute (a class).
3. The object as obtained directly from the defining class's
__dict__, not via getattr. This is especially important for
data attributes: C.data is just a data object, but
C.__dict__['data'] may be a data descriptor with additional
info, like a __doc__ string.
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static methods class methodt propertyt methodt dataN( t getmroR t __dict__R! t NoneR t staticmethodt classmethodR* R R R" (
t clst mrot namest resultt namet objt homeclst baset obj_via_getattrt kind( ( s# /usr/local/lib/python2.5/inspect.pyt classify_class_attrs s<
c C sG | | j o d Sn | i | x | i D] } t | | q, Wd S( N( R" R t _searchbases( R2 t accumR9 ( ( s# /usr/local/lib/python2.5/inspect.pyR= s
c C s< t | d o | i Sn g } t | | t | Sd S( sH Return tuple of base classes (including cls) in method resolution order.t __mro__N( R R? R= t tuple( R2 R5 ( ( s# /usr/local/lib/python2.5/inspect.pyR- # s
c C s, t i | } t | t t i | S( sB Return the indent size, in spaces, at the start of a line of text.( t stringt
expandtabst lent lstrip( t linet expline( ( s# /usr/local/lib/python2.5/inspect.pyt
indentsize- s c C s y
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i j o6 x3 t d t | D] } | | | | | <q Wn x" | o | d o | i q@Wx% | o | d o | i d qeWt i | d Sd S( s Get the documentation string for an object.
All tabs are expanded to spaces. To clean up docstrings that are
indented to line up with blocks of code, any whitespace than can be
uniformly removed from the second line onwards is removed.s
i i iN( t __doc__t AttributeErrorR/ R R t StringTypesRA t splitRB t UnicodeErrort syst maxintRC RD t mint ranget popt join( R t doct linest marginRE t contentt indentt i( ( s# /usr/local/lib/python2.5/inspect.pyt getdoc2 s<
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| i } n t | o | i Sn t d d S( s@ Work out which source or compiled file an object was defined in.t __file__s arg is a built-in modules arg is a built-in classsN arg is not a module, class, method, function, traceback, frame, or code objectN( R R RZ t TypeErrorR RM t modulest gett
__module__R t im_funcR t func_codeR t tb_frameR t f_codeR t co_filename( R ( ( s# /usr/local/lib/python2.5/inspect.pyt getfileV s(
c C s~ t i i | } t d t i } | i xC | D]; \ } } } } | | | j o | | | | | f Sq; q; Wd S( sD Get the module name, suffix, mode, and module type for a given file.c S s& | \ } } } t | | | | f S( ( RC ( t .0t suffixt modet mtype( ( s# /usr/local/lib/python2.5/inspect.pyt <lambda>q s N( t ost patht basenamet mapt impt get_suffixesR# ( Rk t filenamet suffixest neglenRf Rg Rh ( ( s# /usr/local/lib/python2.5/inspect.pyt
getmoduleinfon s
c C s# t | } | o | d Sn d S( s1 Return the module name for a given file, or None.i N( Rs ( Rk t info( ( s# /usr/local/lib/python2.5/inspect.pyt
getmodulenamex s c C s t | } t i | d d j o | d d } n xS t i D]E \ } } } d | j o) t i | t | | j o d SqE qE Wt i i | o | Sn t
t | | d o | Sn d S( sE Return the Python source file an object was defined in, if it exists.is .pycs .pyos .pyt bt
__loader__N( s .pycs .pyo( Rd RA t lowerRn Ro RC R/ Rj Rk t existsR t getmodule( R Rp Rf Rg R; ( ( s# /usr/local/lib/python2.5/inspect.pyt
getsourcefile} s
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t | } n t i i t i i | S( s Return an absolute path to the source or compiled file for an object.
The idea is for each object to have a unique origin, so this routine
normalizes the result as much as possible.N( R/ R{ Rd Rj Rk t normcaset abspath( R t _filename( ( s# /usr/local/lib/python2.5/inspect.pyt
getabsfile s
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D] \ } } t | ot t | d od | i } | t i | d j o q n | t | <t | } | i
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} | | j o | Sq4n d S( sA Return the module an object was defined in, or None if not found.R^ RZ t __main__t __name__t __builtin__N( R R RM R\ R] R^ R/ t
modulesbyfileR R[ t itemsRZ t _filesbymodnameR Rj Rk t realpathR! (
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sb Return the entire source file 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 all the lines
in the file and the line number indexes a line in that list. An IOError
is raised if the source code cannot be retrieved.s could not get source codei s ^(\s*)class\s*s \bt ci s could not find class definitiont co_firstlinenos" could not find function definitions+ ^(\s*def\s)|(.*(?<!\w)lambda(:|\s))|^(\s*@)s could not find code objectN( R{ Rd Rz t linecachet getlinesR. t IOErrorR R R t ret compileRP RC t matchR" t groupR# R R_ R R` R Ra R Rb R R R (
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d } n x< | t | j o( t i | | d j o | d } qr W| t | j o | | d d j ot g } | } xQ | t | j o= | | d d j o( | i t i | | | d } q Wt i
| d Sq n| d j ot | | } | d } | d j ozt i | | d d j o\t | | | j oEt i t i | | g } | d j o | d } t i t i | | } xv | d d j o` t | | | j oI | g | d *| d } | d j o Pn t i t i | | } q Wn x0 | o( t i | d d j o g | d *qWx0 | o( t i | d d j o g | d )qWt i
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sw Get lines of comments immediately preceding an object's source code.
Returns None when source can't be found.
i i s #!i t t #iN( R R (
R R R[ R/ R RC RA t stripR" RB RR RG RD ( R RT R t startt commentst endRW t comment( ( s# /usr/local/lib/python2.5/inspect.pyt getcomments sT
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EndOfBlockc B s e Z RS( ( R R^ ( ( ( s# /usr/local/lib/python2.5/inspect.pyR 0 s t BlockFinderc B s e Z d Z d Z d Z RS( s@ Provide a tokeneater() method to detect the end of a code block.c C s1 d | _ t | _ t | _ t | _ d | _ d S( Ni i ( RW R t islambdat startedt passlinet last( t self( ( s# /usr/local/lib/python2.5/inspect.pyt __init__4 s
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t n d S( Nt deft classt lambdai i ( R R s lambda( R t TrueR R t tokenizet NEWLINER R R t INDENTRW t DEDENTt COMMENTt NL(
R t typet tokent .3t .4RE t srowt scolt erowt ecol( ( s# /usr/local/lib/python2.5/inspect.pyt
tokeneater; s.
)( R R^ RH R R ( ( ( s# /usr/local/lib/python2.5/inspect.pyR 2 s c C sP t } y t i t | i | i Wn t t f j
o n X| | i S( s@ Extract the block of code at the top of the given list of lines.( R R t itert nextR R t IndentationErrorR ( RT t blockfinder( ( s# /usr/local/lib/python2.5/inspect.pyt getblockY s c C sI t | \ } } t | o | d f Sn t | | | d f Sd S( s 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 IOError is
raised if the source code cannot be retrieved.i i N( R R R ( R RT R ( ( s# /usr/local/lib/python2.5/inspect.pyt getsourcelinesb s
c C s" t | \ } } t i | d S( s 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
IOError is raised if the source code cannot be retrieved.R ( R RA RR ( R RT R ( ( s# /usr/local/lib/python2.5/inspect.pyt getsourceo s c C sx g } | i d t d d xR | D]J } | i | | i f | | j o! | i t | | | | q& q& W| S( s- Recursive helper function for getclasstree().R& R^ R ( R# R R" R t walktree( t classest childrent parentR% R ( ( s# /usr/local/lib/python2.5/inspect.pyR y s
%i c C s h } g } x | D] } | i o] xx | i D]K } | | j o g | | <n | | i | | o | | j o Pq- q- Wq | | j o | i | q q Wx, | D]$ } | | j o | i | q q Wt | | d S( s 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.N( R R" R R/ ( R t uniqueR t rootsR R ( ( s# /usr/local/lib/python2.5/inspect.pyt getclasstree s&
i i i i c C sr t | p t d n | i } | i } t | | } d } xt | D]} | | d d j og g g } } } xw| t | i j o`t | i | } | d } | t i
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| f S( s Get information about the arguments accepted by a code object.
Three things are returned: (args, varargs, varkw), where 'args' is
a list of argument names (possibly containing nested lists), and
'varargs' and 'varkw' are the names of the * and ** arguments or None.s arg is not a code objecti i R t .i i t UNPACK_TUPLEt UNPACK_SEQUENCEt
STORE_FASTi( R R ( R R N( R R[ t co_argcountt co_varnamest listRP RC t co_codet ordt dist
HAVE_ARGUMENTt opnameR" RQ R/ t co_flagst
CO_VARARGSt CO_VARKEYWORDS( t cot nargsR4 t argst stepRX t stackt remaint countt opR R' t sizet varargst varkw( ( s# /usr/local/lib/python2.5/inspect.pyt getargs s\
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| i } n t | p t d n t | i \ } } } | | | | i f S( sl Get the names and default values of a function's arguments.
A tuple of four things is returned: (args, varargs, varkw, defaults).
'args' is a list of the argument names (it may contain nested lists).
'varargs' and 'varkw' are the names of the * and ** arguments or None.
'defaults' is an n-tuple of the default values of the last n arguments.
s arg is not a Python function( R R_ R R[ R R` t
func_defaults( t funcR R R ( ( s# /usr/local/lib/python2.5/inspect.pyt
getargspec s
c C s+ t | i \ } } } | | | | i f S( sW Get information about arguments passed into a particular frame.
A tuple of four things is returned: (args, varargs, varkw, locals).
'args' is a list of the argument names (it may contain nested lists).
'varargs' and 'varkw' are the names of the * and ** arguments or None.
'locals' is the locals dictionary of the given frame.( R Rb t f_locals( t frameR R R ( ( s# /usr/local/lib/python2.5/inspect.pyt getargvalues s c C sC t | d j o d | d d Sn d t i | d d Sd S( Ni t (i s ,)s , t )( RC RA RR ( t seq( ( s# /usr/local/lib/python2.5/inspect.pyt joinseq s c C sG t | t t f j o | t | | d | Sn | | Sd S( s7 Recursively walk a sequence, stringifying each element.c S s t | | | S( ( t strseq( t oR t j( ( s# /usr/local/lib/python2.5/inspect.pyRi s N( R R R@ Rm ( R t convertRR ( ( s# /usr/local/lib/python2.5/inspect.pyR s c C s d | S( t *( ( R6 ( ( s# /usr/local/lib/python2.5/inspect.pyRi s c C s d | S( s **( ( R6 ( ( s# /usr/local/lib/python2.5/inspect.pyRi s c C s d t | S( t =( t repr( R' ( ( s# /usr/local/lib/python2.5/inspect.pyRi s c
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} n | i | q: W| d j o | i | | n | d j o | i | | n d t i | d d S( sg Format an argument spec from the 4 values returned by getargspec.
The first four arguments are (args, varargs, varkw, defaults). The
other four arguments are the corresponding optional formatting functions
that are called to turn names and values into strings. The ninth
argument is an optional function to format the sequence of arguments.R s , R N( RC RP R R" R/ RA RR (
R R R t defaultst formatargt
formatvarargst formatvarkwt formatvalueRR t specst firstdefaultRX t spec( ( s# /usr/local/lib/python2.5/inspect.pyt
formatargspec s
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d d S( sf Format an argument spec from the 4 values returned by getargvalues.
The first four arguments are (args, varargs, varkw, locals). The
next four arguments are the corresponding optional formatting functions
that are called to turn names and values into strings. The ninth
argument is an optional function to format the sequence of arguments.c S s | | | | | S( N( ( R6 t localsR R ( ( s# /usr/local/lib/python2.5/inspect.pyR ' s R s , R ( RP RC R" R RA RR ( R R R R R R R R RR R R RX ( ( s# /usr/local/lib/python2.5/inspect.pyt formatargvalues s !%%c C s. t | o | i } | i } n
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| | } | | | | !} | d | } n d } } | | | i i | | f S( s Get information about a frame or traceback object.
A tuple of five things is returned: 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.
The optional second argument specifies the number of lines of context
to return, which are centered around the current line.s& arg is not a frame or traceback objecti i i N( R t tb_linenoRa t f_linenoR R[ R{ Rd R R R/ t maxRO RC Rb t co_name( R t contextt linenoRp R RT R t index( ( s# /usr/local/lib/python2.5/inspect.pyt getframeinfo4 s&
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c C s | i S( sC Get the line number from a frame object, allowing for optimization.( R ( R ( ( s# /usr/local/lib/python2.5/inspect.pyt getlinenoU s c C s? g } x2 | o* | i | f t | | | i } q W| S( s Get a list of records for a frame and all higher (calling) frames.
Each record contains a frame object, filename, line number, function
name, a list of lines of context, and index within the context.( R" R t f_back( R R t framelist( ( s# /usr/local/lib/python2.5/inspect.pyt getouterframesZ s c C sB g } x5 | o- | i | i f t | | | i } q W| S( s Get a list of records for a traceback's frame and all lower frames.
Each record contains a frame object, filename, line number, function
name, a list of lines of context, and index within the context.( R" Ra R t tb_next( t tbR R ( ( s# /usr/local/lib/python2.5/inspect.pyt getinnerframese s c C s t t i d | S( s@ Return a list of records for the stack above the caller's frame.i ( R RM t _getframe( R ( ( s# /usr/local/lib/python2.5/inspect.pyR r s c C s t t i d | S( sC Return a list of records for the stack below the current exception.i ( R RM t exc_info( R ( ( s# /usr/local/lib/python2.5/inspect.pyt tracev s ( ( i i i i (I RH t
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