Chip 2003 January/Chip_2003-01_cd2.bin/convert/eJayMp3Pro/mp3pro_demo.exe/PYCLBR.PYC

Python Compiled Bytecode | 2000-06-16 | 6.5 KB | 191 lines

# Source Generated with Decompyle++
# File: in.pyc (Python 1.5)

"""Parse a Python file and retrieve classes and methods.

Parse enough of a Python file to recognize class and method
definitions and to find out the superclasses of a class.

The interface consists of a single function:
\treadmodule(module, path)
module is the name of a Python module, path is an optional list of
directories where the module is to be searched.  If present, path is
prepended to the system search path sys.path.
The return value is a dictionary.  The keys of the dictionary are
the names of the classes defined in the module (including classes
that are defined via the from XXX import YYY construct).  The values
are class instances of the class Class defined here.

A class is described by the class Class in this module.  Instances
of this class have the following instance variables:
\tname -- the name of the class
\tsuper -- a list of super classes (Class instances)
\tmethods -- a dictionary of methods
\tfile -- the file in which the class was defined
\tlineno -- the line in the file on which the class statement occurred
The dictionary of methods uses the method names as keys and the line
numbers on which the method was defined as values.
If the name of a super class is not recognized, the corresponding
entry in the list of super classes is not a class instance but a
string giving the name of the super class.  Since import statements
are recognized and imported modules are scanned as well, this
shouldn't happen often.

BUGS
Continuation lines are not dealt with at all and strings may confuse
the hell out of the parser, but it usually works."""
import os
import sys
import imp
import re
import string
id = '[A-Za-z_][A-Za-z0-9_]*'
blank_line = re.compile('^[ \t]*($|#)')
is_class = re.compile('^class[ \t]+(?P<id>' + id + ')[ \t]*(?P<sup>\\([^)]*\\))?[ \t]*:')
is_method = re.compile('^[ \t]+def[ \t]+(?P<id>' + id + ')[ \t]*\\(')
is_import = re.compile('^import[ \t]*(?P<imp>[^#;]+)')
is_from = re.compile('^from[ \t]+(?P<module>' + id + '([ \t]*\\.[ \t]*' + id + ')*)[ \t]+import[ \t]+(?P<imp>[^#;]+)')
dedent = re.compile('^[^ \t]')
indent = re.compile('^[^ \t]*')
_modules = { }

class Class:
    '''Class to represent a Python class.'''

    def __init__(self, module, name, super, file, lineno):
        self.module = module
        self.name = name
        if super is None:
            super = []

        self.super = super
        self.methods = { }
        self.file = file
        self.lineno = lineno


    def _addmethod(self, name, lineno):
        self.methods[name] = lineno



def readmodule(module, path = [], inpackage = 0):
    '''Read a module file and return a dictionary of classes.

\tSearch for MODULE in PATH and sys.path, read and parse the
\tmodule and return a dictionary with one entry for each class
\tfound in the module.'''
    i = string.rfind(module, '.')
    if i >= 0:
        package = string.strip(module[:i])
        submodule = string.strip(module[i + 1:])
        parent = readmodule(package, path, inpackage)
        child = readmodule(submodule, parent['__path__'], 1)
        return child

    if _modules.has_key(module):
        return _modules[module]

    if module in sys.builtin_module_names:
        dict = { }
        _modules[module] = dict
        return dict

    f = None
    if inpackage:

        try:
            (suff, mode, type) = (f, file)
        except ImportError:
            f = None


    if f is None:
        fullpath = list(path) + sys.path
        (suff, mode, type) = (f, file)

    if type == imp.PKG_DIRECTORY:
        dict = {
            '__path__': [
                file] }
        _modules[module] = dict
        return dict

    if type != imp.PY_SOURCE:
        f.close()
        dict = { }
        _modules[module] = dict
        return dict

    cur_class = None
    dict = { }
    _modules[module] = dict
    imports = []
    lineno = 0
    while 1:
        line = f.readline()
        if not line:
            break

        lineno = lineno + 1
        line = line[:-1]
        if blank_line.match(line):
            continue

        res = is_import.match(line)
        res = is_from.match(line)
        if res:
            mod = res.group('module')
            names = string.splitfields(res.group('imp'), ',')

            try:
                d = readmodule(mod, path, inpackage)
            except:
                None if res else string.splitfields(res.group('imp'), ',')
                print 'module', mod, 'not found'
                continue

            for n in names:
                n = string.strip(n)
                if d.has_key(n):
                    dict[n] = d[n]
                elif n == '*':
                    for n in d.keys():
                        pass



            continue

        res = is_class.match(line)
        if res:
            class_name = res.group('id')
            inherit = res.group('sup')
            if inherit:
                inherit = string.strip(inherit[1:-1])
                names = []
                for n in string.splitfields(inherit, ','):
                    n = string.strip(n)
                    names.append(n)

                inherit = names

            cur_class = Class(module, class_name, inherit, file, lineno)
            dict[class_name] = cur_class
            continue

        res = is_method.match(line)
        if res:
            if cur_class:
                meth_name = res.group('id')
                cur_class._addmethod(meth_name, lineno)

            continue

        if dedent.match(line):
            cur_class = None

    f.close()
    return dict