Personal Computer World 2008 February/PCWFEB08.iso/Software/Freeware/Miro 1.0/Miro_Installer.exe/Miro_Downloader.exe/pstats.pyc

Python Compiled Bytecode | 2007-11-12 | 22.2 KB | 740 lines

# Source Generated with Decompyle++
# File: in.pyc (Python 2.5)

'''Class for printing reports on profiled python code.'''
import sys
import os
import time
import marshal
import re
__all__ = [
    'Stats']

class Stats:
    '''This class is used for creating reports from data generated by the
    Profile class.  It is a "friend" of that class, and imports data either
    by direct access to members of Profile class, or by reading in a dictionary
    that was emitted (via marshal) from the Profile class.

    The big change from the previous Profiler (in terms of raw functionality)
    is that an "add()" method has been provided to combine Stats from
    several distinct profile runs.  Both the constructor and the add()
    method now take arbitrarily many file names as arguments.

    All the print methods now take an argument that indicates how many lines
    to print.  If the arg is a floating point number between 0 and 1.0, then
    it is taken as a decimal percentage of the available lines to be printed
    (e.g., .1 means print 10% of all available lines).  If it is an integer,
    it is taken to mean the number of lines of data that you wish to have
    printed.

    The sort_stats() method now processes some additional options (i.e., in
    addition to the old -1, 0, 1, or 2).  It takes an arbitrary number of
    quoted strings to select the sort order.  For example sort_stats(\'time\',
    \'name\') sorts on the major key of \'internal function time\', and on the
    minor key of \'the name of the function\'.  Look at the two tables in
    sort_stats() and get_sort_arg_defs(self) for more examples.

    All methods return self,  so you can string together commands like:
        Stats(\'foo\', \'goo\').strip_dirs().sort_stats(\'calls\').                            print_stats(5).print_callers(5)
    '''

    def __init__(self, *args, **kwds):
        self.stream = sys.stdout
        if 'stream' in kwds:
            self.stream = kwds['stream']
            del kwds['stream']

        if not len(args):
            arg = None
        else:
            arg = args[0]
            args = args[1:]
        self.init(arg)
        self.add(*args)


    def init(self, arg):
        self.all_callees = None
        self.files = []
        self.fcn_list = None
        self.total_tt = 0
        self.total_calls = 0
        self.prim_calls = 0
        self.max_name_len = 0
        self.top_level = { }
        self.stats = { }
        self.sort_arg_dict = { }
        self.load_stats(arg)
        trouble = 1

        try:
            self.get_top_level_stats()
            trouble = 0
        finally:
            pass



    def load_stats(self, arg):
        if not arg:
            self.stats = { }
        elif type(arg) == type(''):
            f = open(arg, 'rb')
            self.stats = marshal.load(f)
            f.close()

            try:
                file_stats = os.stat(arg)
                arg = time.ctime(file_stats.st_mtime) + '    ' + arg
            except:
                pass

            self.files = [
                arg]
        elif hasattr(arg, 'create_stats'):
            arg.create_stats()
            self.stats = arg.stats
            arg.stats = { }

        if not self.stats:
            raise TypeError, "Cannot create or construct a %r object from '%r''" % (self.__class__, arg)



    def get_top_level_stats(self):
        for cc, nc, tt, ct, callers in self.stats.items():
            self.total_calls += nc
            self.prim_calls += cc
            self.total_tt += tt
            if len(func_std_string(func)) > self.max_name_len:
                self.max_name_len = len(func_std_string(func))
                continue
            self if callers.has_key(('jprofile', 0, 'profiler')) else self



    def add(self, *arg_list):
        if not arg_list:
            return self

        if len(arg_list) > 1:
            self.add(*arg_list[1:])

        other = arg_list[0]
        if type(self) != type(other) or self.__class__ != other.__class__:
            other = Stats(other)

        self.files += other.files
        self.total_calls += other.total_calls
        self.prim_calls += other.prim_calls
        self.total_tt += other.total_tt
        for func in other.top_level:
            self.top_level[func] = None

        self.fcn_list = None
        for func, stat in other.stats.iteritems():
            self.stats[func] = add_func_stats(old_func_stat, stat)

        return self


    def dump_stats(self, filename):
        '''Write the profile data to a file we know how to load back.'''
        f = file(filename, 'wb')

        try:
            marshal.dump(self.stats, f)
        finally:
            f.close()


    sort_arg_dict_default = {
        'calls': (((1, -1),), 'call count'),
        'cumulative': (((3, -1),), 'cumulative time'),
        'file': (((4, 1),), 'file name'),
        'line': (((5, 1),), 'line number'),
        'module': (((4, 1),), 'file name'),
        'name': (((6, 1),), 'function name'),
        'nfl': (((6, 1), (4, 1), (5, 1)), 'name/file/line'),
        'pcalls': (((0, -1),), 'call count'),
        'stdname': (((7, 1),), 'standard name'),
        'time': (((2, -1),), 'internal time') }

    def get_sort_arg_defs(self):
        '''Expand all abbreviations that are unique.'''
        if not self.sort_arg_dict:
            self.sort_arg_dict = dict = { }
            bad_list = { }
            for word, tup in self.sort_arg_dict_default.iteritems():
                fragment = word
                while fragment:
                    if not fragment:
                        break

                    if fragment in dict:
                        bad_list[fragment] = 0
                        break

                    dict[fragment] = tup
                    fragment = fragment[:-1]

            for word in bad_list:
                del dict[word]


        return self.sort_arg_dict


    def sort_stats(self, *field):
        if not field:
            self.fcn_list = 0
            return self

        if len(field) == 1 and type(field[0]) == type(1):
            field = [
                {
                    -1: 'stdname',
                    0: 'calls',
                    1: 'time',
                    2: 'cumulative' }[field[0]]]

        sort_arg_defs = self.get_sort_arg_defs()
        sort_tuple = ()
        self.sort_type = ''
        connector = ''
        for word in field:
            sort_tuple = sort_tuple + sort_arg_defs[word][0]
            self.sort_type += connector + sort_arg_defs[word][1]
            connector = ', '

        stats_list = []
        for cc, nc, tt, ct, callers in self.stats.iteritems():
            stats_list.append((cc, nc, tt, ct) + func + (func_std_string(func), func))

        stats_list.sort(TupleComp(sort_tuple).compare)
        self.fcn_list = fcn_list = []
        for tuple in stats_list:
            fcn_list.append(tuple[-1])

        return self


    def reverse_order(self):
        if self.fcn_list:
            self.fcn_list.reverse()

        return self


    def strip_dirs(self):
        oldstats = self.stats
        self.stats = newstats = { }
        max_name_len = 0
        for cc, nc, tt, ct, callers in oldstats.iteritems():
            newfunc = func_strip_path(func)
            if len(func_std_string(newfunc)) > max_name_len:
                max_name_len = len(func_std_string(newfunc))

            newcallers = { }
            for func2, caller in callers.iteritems():
                newcallers[func_strip_path(func2)] = caller

            if newfunc in newstats:
                newstats[newfunc] = add_func_stats(newstats[newfunc], (cc, nc, tt, ct, newcallers))
                continue
            newstats[newfunc] = (cc, nc, tt, ct, newcallers)

        old_top = self.top_level
        self.top_level = new_top = { }
        for func in old_top:
            new_top[func_strip_path(func)] = None

        self.max_name_len = max_name_len
        self.fcn_list = None
        self.all_callees = None
        return self


    def calc_callees(self):
        if self.all_callees:
            return None

        self.all_callees = all_callees = { }
        for cc, nc, tt, ct, callers in self.stats.iteritems():
            if func not in all_callees:
                all_callees[func] = { }

            for func2, caller in callers.iteritems():
                if func2 not in all_callees:
                    all_callees[func2] = { }

                all_callees[func2][func] = caller




    def eval_print_amount(self, sel, list, msg):
        new_list = list
        if type(sel) == type(''):
            new_list = []
            for func in list:
                if re.search(sel, func_std_string(func)):
                    new_list.append(func)
                    continue

        else:
            count = len(list)
            if type(sel) == type(1):
                if sel <= sel:
                    pass
                elif sel < 1:
                    count = int(count * sel + 0.5)
                    new_list = list[:count]
                elif type(sel) == type(1):
                    if sel <= sel:
                        pass
                    elif sel < count:
                        count = sel
                        new_list = list[:count]

        if len(list) != len(new_list):
            msg = msg + '   List reduced from %r to %r due to restriction <%r>\n' % (len(list), len(new_list), sel)

        return (new_list, msg)


    def get_print_list(self, sel_list):
        width = self.max_name_len
        if self.fcn_list:
            list = self.fcn_list[:]
            msg = '   Ordered by: ' + self.sort_type + '\n'
        else:
            list = self.stats.keys()
            msg = '   Random listing order was used\n'
        for selection in sel_list:
            (list, msg) = self.eval_print_amount(selection, list, msg)

        count = len(list)
        if not list:
            return (0, list)

        print >>self.stream, msg
        if count < len(self.stats):
            width = 0
            for func in list:
                if len(func_std_string(func)) > width:
                    width = len(func_std_string(func))
                    continue


        return (width + 2, list)


    def print_stats(self, *amount):
        for filename in self.files:
            print >>self.stream, filename

        if self.files:
            print >>self.stream

        indent = '        '
        for func in self.top_level:
            print >>self.stream, indent, func_get_function_name(func)

        print >>self.stream, indent, self.total_calls, 'function calls',
        if self.total_calls != self.prim_calls:
            print >>self.stream, '(%d primitive calls)' % self.prim_calls,

        print >>self.stream, 'in %.3f CPU seconds' % self.total_tt
        print >>self.stream
        (width, list) = self.get_print_list(amount)
        if list:
            self.print_title()
            for func in list:
                self.print_line(func)

            print >>self.stream
            print >>self.stream

        return self


    def print_callees(self, *amount):
        (width, list) = self.get_print_list(amount)
        if list:
            self.calc_callees()
            self.print_call_heading(width, 'called...')
            for func in list:
                if func in self.all_callees:
                    self.print_call_line(width, func, self.all_callees[func])
                    continue
                self.print_call_line(width, func, { })

            print >>self.stream
            print >>self.stream

        return self


    def print_callers(self, *amount):
        (width, list) = self.get_print_list(amount)
        if list:
            self.print_call_heading(width, 'was called by...')
            for func in list:
                (cc, nc, tt, ct, callers) = self.stats[func]
                self.print_call_line(width, func, callers, '<-')

            print >>self.stream
            print >>self.stream

        return self


    def print_call_heading(self, name_size, column_title):
        print >>self.stream, 'Function '.ljust(name_size) + column_title
        subheader = False
        for cc, nc, tt, ct, callers in self.stats.itervalues():
            if callers:
                value = callers.itervalues().next()
                subheader = isinstance(value, tuple)
                break
                continue

        if subheader:
            print >>self.stream, ' ' * name_size + '    ncalls  tottime  cumtime'



    def print_call_line(self, name_size, source, call_dict, arrow = '->'):
        print >>self.stream, func_std_string(source).ljust(name_size) + arrow,
        if not call_dict:
            print >>self.stream
            return None

        clist = call_dict.keys()
        clist.sort()
        indent = ''
        for func in clist:
            name = func_std_string(func)
            value = call_dict[func]
            if isinstance(value, tuple):
                (nc, cc, tt, ct) = value
                if nc != cc:
                    substats = '%d/%d' % (nc, cc)
                else:
                    substats = '%d' % (nc,)
                substats = '%s %s %s  %s' % (substats.rjust(7 + 2 * len(indent)), f8(tt), f8(ct), name)
                left_width = name_size + 1
            else:
                substats = '%s(%r) %s' % (name, value, f8(self.stats[func][3]))
                left_width = name_size + 3
            print >>self.stream, indent * left_width + substats
            indent = ' '



    def print_title(self):
        print >>self.stream, '   ncalls  tottime  percall  cumtime  percall',
        print >>self.stream, 'filename:lineno(function)'


    def print_line(self, func):
        (cc, nc, tt, ct, callers) = self.stats[func]
        c = str(nc)
        if nc != cc:
            c = c + '/' + str(cc)

        print >>self.stream, c.rjust(9),
        print >>self.stream, f8(tt),
        if nc == 0:
            print >>self.stream, '        ',
        else:
            print >>self.stream, f8(tt / nc),
        print >>self.stream, f8(ct),
        if cc == 0:
            print >>self.stream, '        ',
        else:
            print >>self.stream, f8(ct / cc),
        print >>self.stream, func_std_string(func)



class TupleComp:
    '''This class provides a generic function for comparing any two tuples.
    Each instance records a list of tuple-indices (from most significant
    to least significant), and sort direction (ascending or decending) for
    each tuple-index.  The compare functions can then be used as the function
    argument to the system sort() function when a list of tuples need to be
    sorted in the instances order.'''

    def __init__(self, comp_select_list):
        self.comp_select_list = comp_select_list


    def compare(self, left, right):
        for index, direction in self.comp_select_list:
            l = left[index]
            r = right[index]
            if l < r:
                return -direction

            if l > r:
                return direction
                continue

        return 0



def func_strip_path(func_name):
    (filename, line, name) = func_name
    return (os.path.basename(filename), line, name)


def func_get_function_name(func):
    return func[2]


def func_std_string(func_name):
    if func_name[:2] == ('~', 0):
        name = func_name[2]
        if name.startswith('<') and name.endswith('>'):
            return '{%s}' % name[1:-1]
        else:
            return name
    else:
        return '%s:%d(%s)' % func_name


def add_func_stats(target, source):
    '''Add together all the stats for two profile entries.'''
    (cc, nc, tt, ct, callers) = source
    (t_cc, t_nc, t_tt, t_ct, t_callers) = target
    return (cc + t_cc, nc + t_nc, tt + t_tt, ct + t_ct, add_callers(t_callers, callers))


def add_callers(target, source):
    '''Combine two caller lists in a single list.'''
    new_callers = { }
    for func, caller in target.iteritems():
        new_callers[func] = caller

    for func, caller in source.iteritems():
        if func in new_callers:
            new_callers[func] = caller + new_callers[func]
            continue
        new_callers[func] = caller

    return new_callers


def count_calls(callers):
    '''Sum the caller statistics to get total number of calls received.'''
    nc = 0
    for calls in callers.itervalues():
        nc += calls

    return nc


def f8(x):
    return '%8.3f' % x

if __name__ == '__main__':
    import cmd

    try:
        import readline
    except ImportError:
        pass


    class ProfileBrowser(cmd.Cmd):

        def __init__(self, profile = None):
            cmd.Cmd.__init__(self)
            self.prompt = '% '
            if profile is not None:
                self.stats = Stats(profile)
                self.stream = self.stats.stream
            else:
                self.stats = None
                self.stream = sys.stdout


        def generic(self, fn, line):
            args = line.split()
            processed = []
            for term in args:

                try:
                    processed.append(int(term))
                except ValueError:
                    pass


                try:
                    frac = float(term)
                    if frac > 1 or frac < 0:
                        print >>self.stream, 'Fraction argument must be in [0, 1]'
                        continue

                    processed.append(frac)
                except ValueError:
                    pass

                processed.append(term)

            if self.stats:
                getattr(self.stats, fn)(*processed)
            else:
                print >>self.stream, 'No statistics object is loaded.'
            return 0


        def generic_help(self):
            print >>self.stream, 'Arguments may be:'
            print >>self.stream, '* An integer maximum number of entries to print.'
            print >>self.stream, '* A decimal fractional number between 0 and 1, controlling'
            print >>self.stream, '  what fraction of selected entries to print.'
            print >>self.stream, '* A regular expression; only entries with function names'
            print >>self.stream, '  that match it are printed.'


        def do_add(self, line):
            self.stats.add(line)
            return 0


        def help_add(self):
            print >>self.stream, 'Add profile info from given file to current statistics object.'


        def do_callees(self, line):
            return self.generic('print_callees', line)


        def help_callees(self):
            print >>self.stream, 'Print callees statistics from the current stat object.'
            self.generic_help()


        def do_callers(self, line):
            return self.generic('print_callers', line)


        def help_callers(self):
            print >>self.stream, 'Print callers statistics from the current stat object.'
            self.generic_help()


        def do_EOF(self, line):
            print >>self.stream, ''
            return 1


        def help_EOF(self):
            print >>self.stream, 'Leave the profile brower.'


        def do_quit(self, line):
            return 1


        def help_quit(self):
            print >>self.stream, 'Leave the profile brower.'


        def do_read(self, line):
            if line:

                try:
                    self.stats = Stats(line)
                except IOError:
                    args = None
                    print >>self.stream, args[1]
                    return None

                self.prompt = line + '% '
            elif len(self.prompt) > 2:
                line = self.prompt[-2:]
            else:
                print >>self.stream, 'No statistics object is current -- cannot reload.'
            return 0


        def help_read(self):
            print >>self.stream, 'Read in profile data from a specified file.'


        def do_reverse(self, line):
            self.stats.reverse_order()
            return 0


        def help_reverse(self):
            print >>self.stream, 'Reverse the sort order of the profiling report.'


        def do_sort(self, line):
            abbrevs = self.stats.get_sort_arg_defs()
            if line and not filter((lambda x, a = abbrevs: x not in a), line.split()):
                self.stats.sort_stats(*line.split())
            else:
                print >>self.stream, 'Valid sort keys (unique prefixes are accepted):'
                for key, value in Stats.sort_arg_dict_default.iteritems():
                    print >>self.stream, '%s -- %s' % (key, value[1])

            return 0


        def help_sort(self):
            print >>self.stream, 'Sort profile data according to specified keys.'
            print >>self.stream, "(Typing `sort' without arguments lists valid keys.)"


        def complete_sort(self, text, *args):
            return _[1]


        def do_stats(self, line):
            return self.generic('print_stats', line)


        def help_stats(self):
            print >>self.stream, 'Print statistics from the current stat object.'
            self.generic_help()


        def do_strip(self, line):
            self.stats.strip_dirs()
            return 0


        def help_strip(self):
            print >>self.stream, 'Strip leading path information from filenames in the report.'


        def postcmd(self, stop, line):
            if stop:
                return stop



    import sys
    if len(sys.argv) > 1:
        initprofile = sys.argv[1]
    else:
        initprofile = None

    try:
        browser = ProfileBrowser(initprofile)
        print >>browser.stream, 'Welcome to the profile statistics browser.'
        browser.cmdloop()
        print >>browser.stream, 'Goodbye.'
    except KeyboardInterrupt:
        pass