"""Class for printing reports on profiled python code.""" # Class for printing reports on profiled python code. rev 1.0  4/1/94## Based on prior profile module by Sjoerd Mullender...#   which was hacked somewhat by: Guido van Rossum## see profile.doc and profile.py for more info. # Copyright 1994, by InfoSeek Corporation, all rights reserved.# Written by James Roskind## Permission to use, copy, modify, and distribute this Python software# and its associated documentation for any purpose (subject to the# restriction in the following sentence) without fee is hereby granted,# provided that the above copyright notice appears in all copies, and# that both that copyright notice and this permission notice appear in# supporting documentation, and that the name of InfoSeek not be used in# advertising or publicity pertaining to distribution of the software# without specific, written prior permission.  This permission is# explicitly restricted to the copying and modification of the software# to remain in Python, compiled Python, or other languages (such as C)# wherein the modified or derived code is exclusively imported into a# Python module.## INFOSEEK CORPORATION DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS# SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND# FITNESS. IN NO EVENT SHALL INFOSEEK CORPORATION BE LIABLE FOR ANY# SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  import sysimport osimport timeimport marshalimport 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):        # I can't figure out how to explictly specify a stream keyword arg        # with *args:        #   def __init__(self, *args, stream=sys.stdout): ...        # so I use **kwds and sqauwk if something unexpected is passed in.        self.stream = sys.stdout        if "stream" in kwds:            self.stream = kwds["stream"]            del kwds["stream"]        if kwds:            keys = kwds.keys()            keys.sort()            extras = ", ".join(["%s=%s" % (k, kwds[k]) for k in keys])            raise ValueError, "unrecognized keyword args: %s" % extras        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  # calc only if needed        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:            if trouble:                print >> self.stream, "Invalid timing data",                if self.files: print >> self.stream, self.files[-1],                print >> self.stream     def load_stats(self, arg):        if not arg:  self.stats = {}        elif isinstance(arg, basestring):            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:  # in case this is not unix                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)        return     def get_top_level_stats(self):        for func, (cc, nc, tt, ct, callers) in self.stats.items():            self.total_calls += nc            self.prim_calls  += cc            self.total_tt    += tt            if callers.has_key(("jprofile", 0, "profiler")):                self.top_level[func] = None            if len(func_std_string(func)) > self.max_name_len:                self.max_name_len = len(func_std_string(func))     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         if self.max_name_len < other.max_name_len:            self.max_name_len = other.max_name_len         self.fcn_list = None         for func, stat in other.stats.iteritems():            if func in self.stats:                old_func_stat = self.stats[func]            else:                old_func_stat = (0, 0, 0, 0, {},)            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()     # list the tuple indices and directions for sorting,    # along with some printable description    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):            # Be compatible with old profiler            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 func, (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 func, (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))            else:                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        self.all_callees = all_callees = {}        for func, (cc, nc, tt, ct, callers) in self.stats.iteritems():            if not func in all_callees:                all_callees[func] = {}            for func2, caller in callers.iteritems():                if not func2 in all_callees:                    all_callees[func2] = {}                all_callees[func2][func]  = caller        return     #******************************************************************    # The following functions support actual printing of reports    #******************************************************************     # Optional "amount" is either a line count, or a percentage of lines.     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)        else:            count = len(list)            if type(sel) == type(1.0) and 0.0 <= sel < 1.0:                count = int(count * sel + .5)                new_list = list[:count]            elif type(sel) == type(1) and 0 <= 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))        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 = ' ' * 8        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])                else:                    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        # print sub-header only if we have new-style callers        subheader = False        for cc, nc, tt, ct, callers in self.stats.itervalues():            if callers:                value = callers.itervalues().next()                subheader = isinstance(value, tuple)                break        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        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):  # hack : should print percentages        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, ' '*8,        else:            print >> self.stream, f8(tt/nc),        print >> self.stream, f8(ct),        if cc == 0:            print >> self.stream, ' '*8,        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        return 0 #**************************************************************************# func_name is a triple (file:string, line:int, name:string) 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): # match what old profile produced    if func_name[:2] == ('~', 0):        # special case for built-in functions        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 #**************************************************************************# The following functions combine statists for pairs functions.# The bulk of the processing involves correctly handling "call" lists,# such as callers and callees.#************************************************************************** 

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