Python - Get function trace in Xdebug format - https://bitbucket.org/techtonik/xtrace

README.rst

Updated version of this Gist is available from https://bitbucket.org/techtonik/xtrace

xtrace.py

import datetime
import inspect
import os
import sys

oldfunc = None  #: save old trace function if any
def start():
    global oldfunc
    oldfunc = sys.gettrace()
    print datetime.datetime.now().strftime('TRACE START [%Y-%m-%d %H:%M:%S]')
    sys.settrace(function_trace_xdebug)
def stop():
    global oldfunc
    print datetime.datetime.now().strftime('TRACE END   [%Y-%m-%d %H:%M:%S]')
    sys.settrace(oldfunc)

trace_cwd = os.getcwd()  #: current directory is stripped from filenames
trace_depth = 0
trace_filter = ['/usr/lib/python']
# [ ] check what will happen with depth when trace started deep inside and
#     moved out (also check for Xdebug)
def function_trace_xdebug(frame, event, arg):
    '''print function trace in default xdebug human-readable format 
       http://xdebug.org/docs/execution_trace'''
    global trace_depth
    if event == 'call': # generated before any function call
        def strip_cwd(filename):
            global trace_cwd
            if trace_cwd and filename.startswith(trace_cwd):
                return os.path.normpath(filename.replace(trace_cwd, '.', 1))
            return filename
            
        trace_depth += 1
        funcname = frame.f_code.co_name
        filename = strip_cwd(frame.f_code.co_filename)
        lineno = frame.f_lineno
        param = ''
        if funcname == '<module>':
            funcname = '<%s>' % inspect.getmodule(frame.f_code).__name__
            # by analogy with PHP require() trace in Xdebug, the format is
            # <mod.name>(module_location) file_imported_from:line
            param = filename
            filename = strip_cwd(frame.f_back.f_code.co_filename)
        # skip paths mentioned in trace_filter
        if (funcname[0] is not '<' # not module import
                and any( [filename.startswith(x) for x in trace_filter] )):
            pass
        else:
            print '%*s-> %s(%s) %s:%s' % (trace_depth*2, '', funcname, param,
                                      filename, lineno)
        return function_trace_xdebug
    elif event == 'return':
        trace_depth -= 1
    else:
        pass #print 'TRACE: UNKNOWN %s EVENT WITH ARG %s' % (event, arg)
        return

f30994 - add filename and lineno info, add module name for entries

TRACE START [2011-10-20 11:27:06]
-> {main}()
  -> abspath() /usr/lib/python2.7/posixpath.py:341
    -> isabs() /usr/lib/python2.7/posixpath.py:51
    -> join() /usr/lib/python2.7/posixpath.py:60
...
      -> <module>(StringIO) /usr/lib/python2.7/StringIO.py:30
        -> StringIO() /usr/lib/python2.7/StringIO.py:42
      -> <module>(xml) /usr/lib/python2.7/xml/__init__.py:17
      -> <module>(xml.parsers) /usr/lib/python2.7/xml/parsers/__init__.py:8
      -> <module>(xml.parsers.expat) /usr/lib/python2.7/xml/parsers/expat.py:1
      -> ParseError() /home/user07/trac/0.12dev/.pylibs/genshi/input.py:53
      -> XMLParser() /home/user07/trac/0.12dev/.pylibs/genshi/input.py:75
      -> HTMLParser() /home/user07/trac/0.12dev/.pylibs/genshi/input.py:274
  -> exists() /usr/lib/python2.7/genericpath.py:15
  -> trace_stop() bootstrap.py:21
TRACE END   [2011-10-20 11:27:27]

c598d4 - strip current working directory from filenames
7590f2 - wrap actual module name in <>, provide path to module as a param, and mention the line module is imported from in final argument
36b94b - convert to a module

import xtrace
xtrace.start()
# ...
xtrace.stop()