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Diffstat (limited to 'python/helpers/pydev/_pydev_imps/_pydev_inspect.py')
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1 files changed, 794 insertions, 0 deletions
diff --git a/python/helpers/pydev/_pydev_imps/_pydev_inspect.py b/python/helpers/pydev/_pydev_imps/_pydev_inspect.py new file mode 100644 index 000000000000..57147644e769 --- /dev/null +++ b/python/helpers/pydev/_pydev_imps/_pydev_inspect.py @@ -0,0 +1,794 @@ +"""Get useful information from live Python objects. + +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 +""" + +# This module is in the public domain. No warranties. + +__author__ = 'Ka-Ping Yee <ping@lfw.org>' +__date__ = '1 Jan 2001' + +import sys +import os +import types +import string +import re +import imp +import tokenize + +# ----------------------------------------------------------- type-checking +def ismodule(object): + """Return true if the object is a module. + + Module objects provide these attributes: + __doc__ documentation string + __file__ filename (missing for built-in modules)""" + return isinstance(object, types.ModuleType) + +def isclass(object): + """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 defined""" + return isinstance(object, types.ClassType) or hasattr(object, '__bases__') + +def ismethod(object): + """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""" + return isinstance(object, types.MethodType) + +def ismethoddescriptor(object): + """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().""" + return (hasattr(object, "__get__") + and not hasattr(object, "__set__") # else it's a data descriptor + and not ismethod(object) # mutual exclusion + and not isfunction(object) + and not isclass(object)) + +def isfunction(object): + """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__)""" + return isinstance(object, types.FunctionType) + +def istraceback(object): + """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)""" + return isinstance(object, types.TracebackType) + +def isframe(object): + """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""" + return isinstance(object, types.FrameType) + +def iscode(object): + """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""" + return isinstance(object, types.CodeType) + +def isbuiltin(object): + """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""" + return isinstance(object, types.BuiltinFunctionType) + +def isroutine(object): + """Return true if the object is any kind of function or method.""" + return (isbuiltin(object) + or isfunction(object) + or ismethod(object) + or ismethoddescriptor(object)) + +def getmembers(object, predicate=None): + """Return all members of an object as (name, value) pairs sorted by name. + Optionally, only return members that satisfy a given predicate.""" + results = [] + for key in dir(object): + value = getattr(object, key) + if not predicate or predicate(value): + results.append((key, value)) + results.sort() + return results + +def classify_class_attrs(cls): + """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. + """ + + mro = getmro(cls) + names = dir(cls) + result = [] + for name in names: + # Get the object associated with the name. + # Getting an obj from the __dict__ sometimes reveals more than + # using getattr. Static and class methods are dramatic examples. + if name in cls.__dict__: + obj = cls.__dict__[name] + else: + obj = getattr(cls, name) + + # Figure out where it was defined. + homecls = getattr(obj, "__objclass__", None) + if homecls is None: + # search the dicts. + for base in mro: + if name in base.__dict__: + homecls = base + break + + # Get the object again, in order to get it from the defining + # __dict__ instead of via getattr (if possible). + if homecls is not None and name in homecls.__dict__: + obj = homecls.__dict__[name] + + # Also get the object via getattr. + obj_via_getattr = getattr(cls, name) + + # Classify the object. + if isinstance(obj, staticmethod): + kind = "static method" + elif isinstance(obj, classmethod): + kind = "class method" + elif isinstance(obj, property): + kind = "property" + elif (ismethod(obj_via_getattr) or + ismethoddescriptor(obj_via_getattr)): + kind = "method" + else: + kind = "data" + + result.append((name, kind, homecls, obj)) + + return result + +# ----------------------------------------------------------- class helpers +def _searchbases(cls, accum): + # Simulate the "classic class" search order. + if cls in accum: + return + accum.append(cls) + for base in cls.__bases__: + _searchbases(base, accum) + +def getmro(cls): + "Return tuple of base classes (including cls) in method resolution order." + if hasattr(cls, "__mro__"): + return cls.__mro__ + else: + result = [] + _searchbases(cls, result) + return tuple(result) + +# -------------------------------------------------- source code extraction +def indentsize(line): + """Return the indent size, in spaces, at the start of a line of text.""" + expline = string.expandtabs(line) + return len(expline) - len(string.lstrip(expline)) + +def getdoc(object): + """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.""" + try: + doc = object.__doc__ + except AttributeError: + return None + if not isinstance(doc, (str, unicode)): + return None + try: + lines = string.split(string.expandtabs(doc), '\n') + except UnicodeError: + return None + else: + margin = None + for line in lines[1:]: + content = len(string.lstrip(line)) + if not content: continue + indent = len(line) - content + if margin is None: margin = indent + else: margin = min(margin, indent) + if margin is not None: + for i in range(1, len(lines)): lines[i] = lines[i][margin:] + return string.join(lines, '\n') + +def getfile(object): + """Work out which source or compiled file an object was defined in.""" + if ismodule(object): + if hasattr(object, '__file__'): + return object.__file__ + raise TypeError, 'arg is a built-in module' + if isclass(object): + object = sys.modules.get(object.__module__) + if hasattr(object, '__file__'): + return object.__file__ + raise TypeError, 'arg is a built-in class' + if ismethod(object): + object = object.im_func + if isfunction(object): + object = object.func_code + if istraceback(object): + object = object.tb_frame + if isframe(object): + object = object.f_code + if iscode(object): + return object.co_filename + raise TypeError, 'arg is not a module, class, method, ' \ + 'function, traceback, frame, or code object' + +def getmoduleinfo(path): + """Get the module name, suffix, mode, and module type for a given file.""" + filename = os.path.basename(path) + suffixes = map(lambda (suffix, mode, mtype): + (-len(suffix), suffix, mode, mtype), imp.get_suffixes()) + suffixes.sort() # try longest suffixes first, in case they overlap + for neglen, suffix, mode, mtype in suffixes: + if filename[neglen:] == suffix: + return filename[:neglen], suffix, mode, mtype + +def getmodulename(path): + """Return the module name for a given file, or None.""" + info = getmoduleinfo(path) + if info: return info[0] + +def getsourcefile(object): + """Return the Python source file an object was defined in, if it exists.""" + filename = getfile(object) + if string.lower(filename[-4:]) in ['.pyc', '.pyo']: + filename = filename[:-4] + '.py' + for suffix, mode, kind in imp.get_suffixes(): + if 'b' in mode and string.lower(filename[-len(suffix):]) == suffix: + # Looks like a binary file. We want to only return a text file. + return None + if os.path.exists(filename): + return filename + +def getabsfile(object): + """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.""" + return os.path.normcase( + os.path.abspath(getsourcefile(object) or getfile(object))) + +modulesbyfile = {} + +def getmodule(object): + """Return the module an object was defined in, or None if not found.""" + if ismodule(object): + return object + if isclass(object): + return sys.modules.get(object.__module__) + try: + file = getabsfile(object) + except TypeError: + return None + if modulesbyfile.has_key(file): + return sys.modules[modulesbyfile[file]] + for module in sys.modules.values(): + if hasattr(module, '__file__'): + modulesbyfile[getabsfile(module)] = module.__name__ + if modulesbyfile.has_key(file): + return sys.modules[modulesbyfile[file]] + main = sys.modules['__main__'] + if hasattr(main, object.__name__): + mainobject = getattr(main, object.__name__) + if mainobject is object: + return main + builtin = sys.modules['__builtin__'] + if hasattr(builtin, object.__name__): + builtinobject = getattr(builtin, object.__name__) + if builtinobject is object: + return builtin + +def findsource(object): + """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.""" + try: + file = open(getsourcefile(object)) + except (TypeError, IOError): + raise IOError, 'could not get source code' + lines = file.readlines() + file.close() + + if ismodule(object): + return lines, 0 + + if isclass(object): + name = object.__name__ + pat = re.compile(r'^\s*class\s*' + name + r'\b') + for i in range(len(lines)): + if pat.match(lines[i]): return lines, i + else: raise IOError, 'could not find class definition' + + if ismethod(object): + object = object.im_func + if isfunction(object): + object = object.func_code + if istraceback(object): + object = object.tb_frame + if isframe(object): + object = object.f_code + if iscode(object): + if not hasattr(object, 'co_firstlineno'): + raise IOError, 'could not find function definition' + lnum = object.co_firstlineno - 1 + pat = re.compile(r'^(\s*def\s)|(.*\slambda(:|\s))') + while lnum > 0: + if pat.match(lines[lnum]): break + lnum = lnum - 1 + return lines, lnum + raise IOError, 'could not find code object' + +def getcomments(object): + """Get lines of comments immediately preceding an object's source code.""" + try: lines, lnum = findsource(object) + except IOError: return None + + if ismodule(object): + # Look for a comment block at the top of the file. + start = 0 + if lines and lines[0][:2] == '#!': start = 1 + while start < len(lines) and string.strip(lines[start]) in ['', '#']: + start = start + 1 + if start < len(lines) and lines[start][:1] == '#': + comments = [] + end = start + while end < len(lines) and lines[end][:1] == '#': + comments.append(string.expandtabs(lines[end])) + end = end + 1 + return string.join(comments, '') + + # Look for a preceding block of comments at the same indentation. + elif lnum > 0: + indent = indentsize(lines[lnum]) + end = lnum - 1 + if end >= 0 and string.lstrip(lines[end])[:1] == '#' and \ + indentsize(lines[end]) == indent: + comments = [string.lstrip(string.expandtabs(lines[end]))] + if end > 0: + end = end - 1 + comment = string.lstrip(string.expandtabs(lines[end])) + while comment[:1] == '#' and indentsize(lines[end]) == indent: + comments[:0] = [comment] + end = end - 1 + if end < 0: break + comment = string.lstrip(string.expandtabs(lines[end])) + while comments and string.strip(comments[0]) == '#': + comments[:1] = [] + while comments and string.strip(comments[-1]) == '#': + comments[-1:] = [] + return string.join(comments, '') + +class ListReader: + """Provide a readline() method to return lines from a list of strings.""" + def __init__(self, lines): + self.lines = lines + self.index = 0 + + def readline(self): + i = self.index + if i < len(self.lines): + self.index = i + 1 + return self.lines[i] + else: return '' + +class EndOfBlock(Exception): pass + +class BlockFinder: + """Provide a tokeneater() method to detect the end of a code block.""" + def __init__(self): + self.indent = 0 + self.started = 0 + self.last = 0 + + def tokeneater(self, type, token, (srow, scol), (erow, ecol), line): + if not self.started: + if type == tokenize.NAME: self.started = 1 + elif type == tokenize.NEWLINE: + self.last = srow + elif type == tokenize.INDENT: + self.indent = self.indent + 1 + elif type == tokenize.DEDENT: + self.indent = self.indent - 1 + if self.indent == 0: raise EndOfBlock, self.last + elif type == tokenize.NAME and scol == 0: + raise EndOfBlock, self.last + +def getblock(lines): + """Extract the block of code at the top of the given list of lines.""" + try: + tokenize.tokenize(ListReader(lines).readline, BlockFinder().tokeneater) + except EndOfBlock, eob: + return lines[:eob.args[0]] + # Fooling the indent/dedent logic implies a one-line definition + return lines[:1] + +def 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 IOError is + raised if the source code cannot be retrieved.""" + lines, lnum = findsource(object) + + if ismodule(object): return lines, 0 + else: return getblock(lines[lnum:]), lnum + 1 + +def 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 + IOError is raised if the source code cannot be retrieved.""" + lines, lnum = getsourcelines(object) + return string.join(lines, '') + +# --------------------------------------------------- class tree extraction +def walktree(classes, children, parent): + """Recursive helper function for getclasstree().""" + results = [] + classes.sort(lambda a, b: cmp(a.__name__, b.__name__)) + for c in classes: + results.append((c, c.__bases__)) + if children.has_key(c): + results.append(walktree(children[c], children, c)) + return results + +def getclasstree(classes, unique=0): + """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.""" + children = {} + roots = [] + for c in classes: + if c.__bases__: + for parent in c.__bases__: + if not children.has_key(parent): + children[parent] = [] + children[parent].append(c) + if unique and parent in classes: break + elif c not in roots: + roots.append(c) + for parent in children.keys(): + if parent not in classes: + roots.append(parent) + return walktree(roots, children, None) + +# ------------------------------------------------ argument list extraction +# These constants are from Python's compile.h. +CO_OPTIMIZED, CO_NEWLOCALS, CO_VARARGS, CO_VARKEYWORDS = 1, 2, 4, 8 + +def getargs(co): + """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.""" + if not iscode(co): raise TypeError, 'arg is not a code object' + + nargs = co.co_argcount + names = co.co_varnames + args = list(names[:nargs]) + step = 0 + + # The following acrobatics are for anonymous (tuple) arguments. + if not sys.platform.startswith('java'):#Jython doesn't have co_code + code = co.co_code + import dis + for i in range(nargs): + if args[i][:1] in ['', '.']: + stack, remain, count = [], [], [] + while step < len(code): + op = ord(code[step]) + step = step + 1 + if op >= dis.HAVE_ARGUMENT: + opname = dis.opname[op] + value = ord(code[step]) + ord(code[step + 1]) * 256 + step = step + 2 + if opname in ['UNPACK_TUPLE', 'UNPACK_SEQUENCE']: + remain.append(value) + count.append(value) + elif opname == 'STORE_FAST': + stack.append(names[value]) + remain[-1] = remain[-1] - 1 + while remain[-1] == 0: + remain.pop() + size = count.pop() + stack[-size:] = [stack[-size:]] + if not remain: break + remain[-1] = remain[-1] - 1 + if not remain: break + args[i] = stack[0] + + varargs = None + if co.co_flags & CO_VARARGS: + varargs = co.co_varnames[nargs] + nargs = nargs + 1 + varkw = None + if co.co_flags & CO_VARKEYWORDS: + varkw = co.co_varnames[nargs] + return args, varargs, varkw + +def getargspec(func): + """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.""" + if ismethod(func): + func = func.im_func + if not isfunction(func): raise TypeError, 'arg is not a Python function' + args, varargs, varkw = getargs(func.func_code) + return args, varargs, varkw, func.func_defaults + +def getargvalues(frame): + """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.""" + args, varargs, varkw = getargs(frame.f_code) + return args, varargs, varkw, frame.f_locals + +def joinseq(seq): + if len(seq) == 1: + return '(' + seq[0] + ',)' + else: + return '(' + string.join(seq, ', ') + ')' + +def strseq(object, convert, join=joinseq): + """Recursively walk a sequence, stringifying each element.""" + if type(object) in [types.ListType, types.TupleType]: + return join(map(lambda o, c=convert, j=join: strseq(o, c, j), object)) + else: + return convert(object) + +def formatargspec(args, varargs=None, varkw=None, defaults=None, + formatarg=str, + formatvarargs=lambda name: '*' + name, + formatvarkw=lambda name: '**' + name, + formatvalue=lambda value: '=' + repr(value), + join=joinseq): + """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.""" + specs = [] + if defaults: + firstdefault = len(args) - len(defaults) + for i in range(len(args)): + spec = strseq(args[i], formatarg, join) + if defaults and i >= firstdefault: + spec = spec + formatvalue(defaults[i - firstdefault]) + specs.append(spec) + if varargs: + specs.append(formatvarargs(varargs)) + if varkw: + specs.append(formatvarkw(varkw)) + return '(' + string.join(specs, ', ') + ')' + +def formatargvalues(args, varargs, varkw, locals, + formatarg=str, + formatvarargs=lambda name: '*' + name, + formatvarkw=lambda name: '**' + name, + formatvalue=lambda value: '=' + repr(value), + join=joinseq): + """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.""" + def convert(name, locals=locals, + formatarg=formatarg, formatvalue=formatvalue): + return formatarg(name) + formatvalue(locals[name]) + specs = [] + for i in range(len(args)): + specs.append(strseq(args[i], convert, join)) + if varargs: + specs.append(formatvarargs(varargs) + formatvalue(locals[varargs])) + if varkw: + specs.append(formatvarkw(varkw) + formatvalue(locals[varkw])) + return '(' + string.join(specs, ', ') + ')' + +# -------------------------------------------------- stack frame extraction +def getframeinfo(frame, context=1): + """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.""" + raise NotImplementedError +# if istraceback(frame): +# frame = frame.tb_frame +# if not isframe(frame): +# raise TypeError, 'arg is not a frame or traceback object' +# +# filename = getsourcefile(frame) +# lineno = getlineno(frame) +# if context > 0: +# start = lineno - 1 - context//2 +# try: +# lines, lnum = findsource(frame) +# except IOError: +# lines = index = None +# else: +# start = max(start, 1) +# start = min(start, len(lines) - context) +# lines = lines[start:start+context] +# index = lineno - 1 - start +# else: +# lines = index = None +# +# return (filename, lineno, frame.f_code.co_name, lines, index) + +def getlineno(frame): + """Get the line number from a frame object, allowing for optimization.""" + # Written by Marc-Andr Lemburg; revised by Jim Hugunin and Fredrik Lundh. + lineno = frame.f_lineno + code = frame.f_code + if hasattr(code, 'co_lnotab'): + table = code.co_lnotab + lineno = code.co_firstlineno + addr = 0 + for i in range(0, len(table), 2): + addr = addr + ord(table[i]) + if addr > frame.f_lasti: break + lineno = lineno + ord(table[i + 1]) + return lineno + +def getouterframes(frame, context=1): + """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.""" + framelist = [] + while frame: + framelist.append((frame,) + getframeinfo(frame, context)) + frame = frame.f_back + return framelist + +def getinnerframes(tb, context=1): + """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.""" + framelist = [] + while tb: + framelist.append((tb.tb_frame,) + getframeinfo(tb, context)) + tb = tb.tb_next + return framelist + +def currentframe(): + """Return the frame object for the caller's stack frame.""" + try: + raise 'catch me' + except: + return sys.exc_traceback.tb_frame.f_back #@UndefinedVariable + +if hasattr(sys, '_getframe'): currentframe = sys._getframe + +def stack(context=1): + """Return a list of records for the stack above the caller's frame.""" + return getouterframes(currentframe().f_back, context) + +def trace(context=1): + """Return a list of records for the stack below the current exception.""" + return getinnerframes(sys.exc_traceback, context) #@UndefinedVariable |