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How to use py3to2 method in Robotframework

Best Python code snippet using robotframework

recipe-574437.py

Source:recipe-574437.py

...187      # compile, expand, recompile, exec188      if PYVERSION == 'py2x': print s189      if 0: print s190      else:191        t = t0.py3to2() if hasattr(t0, 'py3to2') else t0; xxx = t; s = repr(t)192if 0: TESTCODE = 'a, *b = 1, 2, 3; print(a, b)' # pep3132 - Extended Iterable Unpacking193if 0: TESTCODE = """194?z = 3195?def foo(x, *y): return x, y, z196?print foo(1)197"""198if 1: TESTCODE = """199?def foo(x):200?  def bar(): nonlocal x; x += 1201?  bar(); return x202?print(foo(1))""" # nonlocal statement203TESTCODE = TESTCODE.replace('?', '')204# end common205# beg py2x init206from __future__ import nested_scopes, generators, division, absolute_import, with_statement; import py3to2; from py3to2 import *207import __builtin__; sys.modules['builtins'] = builtins = __builtin__; builtins.bytes = str208import itertools; filter, map, range, zip = itertools.ifilter, itertools.imap, xrange, itertools.izip # iterators209execsrc('common')210import mmap, signal, subprocess, time211class _server(object): # python3k server which byte compiles 3k code212  bufsize = 1<<20213  @staticmethod214  def restart(restart = True):215    self = _server216  # def restart(self, restart = True):217    global SERVERIO, SERVER218    if restart:219      if 'SERVERIO' in globals():220        for x in SERVERIO: os.close(x)221      SERVERIO = os.pipe()222      print 'py3to2 server restarting with io: %s'%(SERVERIO, )223      if 'SERVER' in globals(): self.kill()224      SERVER = subprocess.Popen('python3k -i', stdin = subprocess.PIPE, stdout = SERVERIO[1], stderr = subprocess.STDOUT, shell = True)225    SERVER.stdin.write('import py3to2; reload(py3to2); from py3to2 import *\n')226    SERVER.stdin.write('CLIENTPID = %i\n'%PID)227  @staticmethod228  def kill():229  # def kill(self):230    global SERVER231    try: os.kill(SERVER.pid, signal.SIGTERM)232    except Exception, exc: print exc233    del SERVER234  @staticmethod235  def input(s, stdout = True, timeout = 2,236            prompt = rgx2nd(('(.+)', 'py3to2 server: \\1'), ),237            subprompt = rgx2nd(('>>> ', '', None), ),238            fndexc = re.compile('\WTraceback '),239            ):240    self = _server241    if not s: return242    SERVER.stdin.write(s)243    try:244      buf = ''245      SERVER.stdin.write("\n\nimport os, signal; os.kill(CLIENTPID, signal.SIGINT)\n")246      time.sleep(timeout)247      raise IOError('py3to2 server not responding to input: %s'%repr(s))248    except KeyboardInterrupt:249      buf = os.read(SERVERIO[0], self.bufsize)250      buf = subprompt.sub(buf)251      if prompt: buf = prompt.sub(buf)252    if fndexc.search(buf): raise IOError('py3to2 server input: %s\n%s'%(s, buf))253    if stdout: sys.stdout.write(buf)254    else: return buf255  @staticmethod256  def get(varname, **kwds):257    self = _server258    return self.input("print(%s)"%varname, stdout = None, prompt = None, **kwds)259  def __init__(self, restart = None):260    global SERVER261    self.restart(restart = 'SERVER' not in globals())262    self.input('\n')263  @staticmethod264  def test():265    self = _server266    global xxx267    if 1: # server init268      self.restart()269      self.input("1, 2;3")270    if 0: # py3k codetree271        server.input("codetree.test()")272        if 1: # 3to2273          s = server.get('xxx')274          t = eval(s)275          c = t.compile()276          print dis.dis(c)277          exec(c, globals())278server = _server()279if 1:280  def builtinsadd(f): setattr(__builtin__, f.__name__, f); return f281  @builtinsadd282  def print_py3k(*args, **kwds):283    sep = kwds['sep'] if 'sep' in kwds else ' '284    end = kwds['end'] if 'end' in kwds else '\n'285    file = kwds['file'] if 'file' in kwds else sys.stdout286    s = sep.join(str(x) for x in args)287    file.write(s)288    file.write(end)289  @builtinsadd290  def compile_py3k(source, filename, mode, *args, **kwds):291    """292py3k example:293import py3to2; from py3to2 import print_py3k294src = "a, b, *c = 1, 2, 3, 4, 5; print('a =', a); print('b =', b); print('c =', c)"295code_object = py3to2.compile_py3k(src, '', 'exec')296exec(code_object, globals())297"""298    s = "x = compile(%s, %s, %s, *%s, **%s); x = codetree(x).py3to2()"%tuple(repr(x) for x in (source, filename, mode, args, kwds))299    server.input(s)300    x = server.get('x')301    x = eval(x)302    x = x.compile()303    if 1: dis.dis(x)304    return x305  compile_py3k.__doc__ += compile.__doc__306  if 0: # test307    x = compile_py3k(TESTCODE, '', 'exec')308    print dis.dis(x)309    exec(x)310# execsrc('py3k parse', compile_py3k)311# end py2x init312# beg py3k init313import py3to2; from py3to2 import *314import builtins, imp; builtins.basestring = str, bytes; builtins.reload = imp.reload315execsrc('common')316class codetree(codetree):317  builtins = {'print':'print_py3k'}318  # builtins = {}319  def py3to2(self):320    assert not self.co_kwonlyargcount, (self.co_kwonlyargcount)321    s = bytearray(self.co_code)322    op3to2 = self.op3to2323    HAVE_ARGUMENT = opcode.HAVE_ARGUMENT324    skip = 0325    for i, x in enumerate(s):326      if skip: skip -= 1; continue327      if x >= HAVE_ARGUMENT: skip = 2328      if x in op3to2: s[i] = op3to2[x]329    self.co_code = s.str()330    for i, x in enumerate(self.co_names):331      # if x == 'print': self.co_names[i] = 'py3to2.compiler.print_py3k'332      if x in self.builtins: self.co_names[i] = self.builtins[x]333    for x in self.co_args:334      y = getattr(self, x)335      if isinstance(y, bytes): setattr(self, x, y.str())336    for i, x in enumerate(self.co_consts):337      if isinstance(x, codetree): self.co_consts[i] = x.py3to2()338    return self339# end py3k init340# beg py3k parse341# end py3k parse342################################343copy this to ceval.c344################################345/* Execute compiled code */346/* XXX TO DO:347   XXX speed up searching for keywords by using a dictionary348   XXX document it!349   */350/* enable more aggressive intra-module optimizations, where available */351#define PY_LOCAL_AGGRESSIVE...

recipe-574436.py

Source:recipe-574436.py

...187      # compile, expand, recompile, exec188      if PYVERSION == 'py2x': print s189      if 0: print s190      else:191        t = t0.py3to2() if hasattr(t0, 'py3to2') else t0; xxx = t; s = repr(t)192if 0: TESTCODE = 'a, *b = 1, 2, 3; print(a, b)' # pep3132 - Extended Iterable Unpacking193if 0: TESTCODE = """194?z = 3195?def foo(x, *y): return x, y, z196?print foo(1)197"""198if 1: TESTCODE = """199?def foo(x):200?  def bar(): nonlocal x; x += 1201?  bar(); return x202?print(foo(1))""" # nonlocal statement203TESTCODE = TESTCODE.replace('?', '')204# end common205# beg py2x init206from __future__ import nested_scopes, generators, division, absolute_import, with_statement; import py3to2; from py3to2 import *207import __builtin__; sys.modules['builtins'] = builtins = __builtin__; builtins.bytes = str208import itertools; filter, map, range, zip = itertools.ifilter, itertools.imap, xrange, itertools.izip # iterators209execsrc('common')210import mmap, signal, subprocess, time211class _server(object): # python3k server which byte compiles 3k code212  bufsize = 1<<20213  @staticmethod214  def restart(restart = True):215    self = _server216  # def restart(self, restart = True):217    global SERVERIO, SERVER218    if restart:219      if 'SERVERIO' in globals():220        for x in SERVERIO: os.close(x)221      SERVERIO = os.pipe()222      print 'py3to2 server restarting with io: %s'%(SERVERIO, )223      if 'SERVER' in globals(): self.kill()224      SERVER = subprocess.Popen('python3k -i', stdin = subprocess.PIPE, stdout = SERVERIO[1], stderr = subprocess.STDOUT, shell = True)225    SERVER.stdin.write('import py3to2; reload(py3to2); from py3to2 import *\n')226    SERVER.stdin.write('CLIENTPID = %i\n'%PID)227  @staticmethod228  def kill():229  # def kill(self):230    global SERVER231    try: os.kill(SERVER.pid, signal.SIGTERM)232    except Exception, exc: print exc233    del SERVER234  @staticmethod235  def input(s, stdout = True, timeout = 2,236            prompt = rgx2nd(('(.+)', 'py3to2 server: \\1'), ),237            subprompt = rgx2nd(('>>> ', '', None), ),238            fndexc = re.compile('\WTraceback '),239            ):240    self = _server241    if not s: return242    SERVER.stdin.write(s)243    try:244      buf = ''245      SERVER.stdin.write("\n\nimport os, signal; os.kill(CLIENTPID, signal.SIGINT)\n")246      time.sleep(timeout)247      raise IOError('py3to2 server not responding to input: %s'%repr(s))248    except KeyboardInterrupt:249      buf = os.read(SERVERIO[0], self.bufsize)250      buf = subprompt.sub(buf)251      if prompt: buf = prompt.sub(buf)252    if fndexc.search(buf): raise IOError('py3to2 server input: %s\n%s'%(s, buf))253    if stdout: sys.stdout.write(buf)254    else: return buf255  @staticmethod256  def get(varname, **kwds):257    self = _server258    return self.input("print(%s)"%varname, stdout = None, prompt = None, **kwds)259  def __init__(self, restart = None):260    global SERVER261    self.restart(restart = 'SERVER' not in globals())262    self.input('\n')263  @staticmethod264  def test():265    self = _server266    global xxx267    if 1: # server init268      self.restart()269      self.input("1, 2;3")270    if 0: # py3k codetree271        server.input("codetree.test()")272        if 1: # 3to2273          s = server.get('xxx')274          t = eval(s)275          c = t.compile()276          print dis.dis(c)277          exec(c, globals())278server = _server()279if 1:280  def builtinsadd(f): setattr(__builtin__, f.__name__, f); return f281  @builtinsadd282  def print_py3k(*args, **kwds):283    sep = kwds['sep'] if 'sep' in kwds else ' '284    end = kwds['end'] if 'end' in kwds else '\n'285    file = kwds['file'] if 'file' in kwds else sys.stdout286    s = sep.join(str(x) for x in args)287    file.write(s)288    file.write(end)289  @builtinsadd290  def compile_py3k(source, filename, mode, *args, **kwds):291    """292py3k example:293import py3to2; from py3to2 import print_py3k294src = "a, b, *c = 1, 2, 3, 4, 5; print('a =', a); print('b =', b); print('c =', c)"295code_object = py3to2.compile_py3k(src, '', 'exec')296exec(code_object, globals())297"""298    s = "x = compile(%s, %s, %s, *%s, **%s); x = codetree(x).py3to2()"%tuple(repr(x) for x in (source, filename, mode, args, kwds))299    server.input(s)300    x = server.get('x')301    x = eval(x)302    x = x.compile()303    if 1: dis.dis(x)304    return x305  compile_py3k.__doc__ += compile.__doc__306  if 0: # test307    x = compile_py3k(TESTCODE, '', 'exec')308    print dis.dis(x)309    exec(x)310# execsrc('py3k parse', compile_py3k)311# end py2x init312# beg py3k init313import py3to2; from py3to2 import *314import builtins, imp; builtins.basestring = str, bytes; builtins.reload = imp.reload315execsrc('common')316class codetree(codetree):317  builtins = {'print':'print_py3k'}318  # builtins = {}319  def py3to2(self):320    assert not self.co_kwonlyargcount, (self.co_kwonlyargcount)321    s = bytearray(self.co_code)322    op3to2 = self.op3to2323    HAVE_ARGUMENT = opcode.HAVE_ARGUMENT324    skip = 0325    for i, x in enumerate(s):326      if skip: skip -= 1; continue327      if x >= HAVE_ARGUMENT: skip = 2328      if x in op3to2: s[i] = op3to2[x]329    self.co_code = s.str()330    for i, x in enumerate(self.co_names):331      # if x == 'print': self.co_names[i] = 'py3to2.compiler.print_py3k'332      if x in self.builtins: self.co_names[i] = self.builtins[x]333    for x in self.co_args:334      y = getattr(self, x)335      if isinstance(y, bytes): setattr(self, x, y.str())336    for i, x in enumerate(self.co_consts):337      if isinstance(x, codetree): self.co_consts[i] = x.py3to2()338    return self339# end py3k init340# beg py3k parse341# end py3k parse342################################343copy this to ceval.c344################################345/* Execute compiled code */346/* XXX TO DO:347   XXX speed up searching for keywords by using a dictionary348   XXX document it!349   */350/* enable more aggressive intra-module optimizations, where available */351#define PY_LOCAL_AGGRESSIVE...

py3to2.py

Source:py3to2.py

1"""2@file3@brief  Helper to convert a script written in Python 3 to Python 24"""5import os6import re7import shutil8from ..filehelper.synchelper import explore_folder_iterfile9from ..loghelper.flog import noLOG10from .default_regular_expression import _setup_pattern_copy11class Convert3to2Exception(Exception):12    """13    exception raised for an exception happening during the conversion14    """15    pass16def py3to2_convert_tree(folder, dest, encoding="utf8", pattern=".*[.]py$",17                        pattern_copy=_setup_pattern_copy,18                        unittest_modules=None, fLOG=noLOG):19    """20    Converts files in a folder and its subfolders from python 3 to python 2,21    the function only considers python script (verifying *pattern*).22    @param      folder              folder23    @param      dest                destination24    @param      encoding            all files will be saved with this encoding25    @param      pattern             pattern to find source code26    @param      pattern_copy        copy these files, do not modify them27    @param      fLOG                logging function28    @param      unittest_modules    modules used during unit tests but not installed29    @return                         list of copied files30    If a folder does not exists, it will create it.31    The function excludes all files in subfolders32    starting by ``dist``, ``_doc``, ``build``, ``extensions``, ``nbextensions``.33    The function also exclude subfolders inside34    subfolders following the pattern ``ut_.*``.35    There are some issues difficult to solve with strings.36    Python 2.7 is not friendly with strings. Some needed pieces of code::37        if sys.version_info[0]==2:38            from codecs import open39    You can also read blog post :ref:`b-migration-py2py3`.40    The variable *unittest_modules* indicates the list of41    modules which are not installed in :epkg:`Python` distribution42    but still used and placed in the same folder as the same which43    has to converted.44    *unittest_modules* can be either a list or a tuple ``(module, alias)``.45    Then the alias appears instead of the module name.46    The function does not convert the exception47    `FileNotFoundError <https://docs.python.org/3/library/exceptions.html>`_48    which only exists in Python 3. The module will fail in version 2.749    if this exception is raised.50    The following page51    `Cheat Sheet: Writing Python 2-3 compatible code52    <http://python-future.org/compatible_idioms.html>`_53    gives the difference between the two versions of Python54    and how to write compatible code.55    """56    exclude = ("temp_", "dist", "_doc", "build", "extensions",57               "nbextensions", "dist_module27", "_virtualenv", "_venv")58    reg = re.compile(".*/ut_.*/.*/.*")59    conv = []60    for file in explore_folder_iterfile(folder, pattern=pattern):61        full = os.path.join(folder, file)62        if "site-packages" in full:63            continue64        file = os.path.relpath(file, folder)65        # undesired sub folders66        ex = False67        for exc in exclude:68            if file.startswith(exc) or "\\temp_" in file or \69               "/temp_" in file or "dist_module27" in file:70                ex = True71                break72        if ex:73            continue74        # subfolders inside unit tests folder75        lfile = file.replace("\\", "/")76        if reg.search(lfile):77            continue78        py2 = py3to2_convert(full, unittest_modules)79        destfile = os.path.join(dest, file)80        dirname = os.path.dirname(destfile)81        if not os.path.exists(dirname):82            os.makedirs(dirname)83        with open(destfile, "w", encoding="utf8") as f:84            f.write(py2)85        conv.append(destfile)86    for file in explore_folder_iterfile(folder, pattern=pattern_copy):87        full = os.path.join(folder, file)88        file = os.path.relpath(file, folder)89        # undesired sub folders90        ex = False91        for exc in exclude:92            if file.startswith(exc) or "\\temp_" in file or \93               "/temp_" in file or "dist_module27" in file:94                ex = True95                break96        if ex:97            continue98        destfile = os.path.join(dest, file)99        dirname = os.path.dirname(destfile)100        if not os.path.exists(dirname):101            os.makedirs(dirname)102        shutil.copy(full, dirname)103        conv.append(destfile)104    fLOG("py3to2_convert_tree, copied", len(conv), "files")105    return conv106def py3to2_convert(script, unittest_modules):107    """108    converts a script into from python 3 to python 2109    @param      script              script or filename110    @param      unittest_modules    modules used during unit test but not installed,111                                    @see fn py3to2_convert_tree112    @return                         string113    See see @fn py3to2_convert_tree for more information.114    """115    if os.path.exists(script):116        try:117            with open(script, "r", encoding="utf8") as f:118                content = f.read()119        except (UnicodeEncodeError, UnicodeDecodeError):  # pragma: no cover120            with open(script, "r") as f:121                content = f.read()122    else:123        content = script  # pragma: no cover124    # start processing125    content = py3to2_remove_raise_from(content)126    # unicode127    if ("install_requires=" in content or "package_data" in content) and "setup" in content:128        # we skip the file setup.py as it raises an error129        pass130    else:131        try:132            content = py3to2_future(content)133        except Convert3to2Exception as e:  # pragma: no cover134            raise Convert3to2Exception(135                'unable to convert a file due to unicode issue.\n  File "{0}", line 1'.format(script)) from e136    # some other modification137    content = content.replace("from queue import", "from Queue import")138    content = content.replace("nonlocal ", "# nonlocal ")139    # long and unicode140    content = content.replace("int  #long#", "long")141    content = content.replace("int  # long#", "long")142    content = content.replace("str  #unicode#", "unicode")143    content = content.replace("str  # unicode#", "unicode")144    content = content.replace(145        "Programming Language :: Python :: 3", "Programming Language :: Python :: 2")146    content = content.replace(', sep="\\t")', ', sep="\\t".encode("ascii"))')147    # imported modules148    if unittest_modules is not None:149        content = py3to2_imported_local_modules(content, unittest_modules)150    # end151    return content152def py3to2_future(content):153    """154    checks that import ``from __future__ import unicode_literals``155    is always present, the function assumes it is a python code156    @param      content     file content157    @return                 new content158    """159    find = "from __future__ import unicode_literals"160    if find in content and '"{0}"'.format(find) not in content:161        # the second condition avoid to raise this162        # exception when parsing this file163        # this case should only happen for this file164        raise Convert3to2Exception(  # pragma: no cover165            "unable to convert a file")166    lines = content.split("\n")167    position = 0168    incomment = None169    while (position < len(lines) and not lines[position].startswith("import ") and170            not lines[position].startswith("from ") and171            not lines[position].startswith("def ") and172            not lines[position].startswith("class ")):173        if incomment is None:174            if lines[position].startswith("'''"):175                incomment = "'''"  # pragma: no cover176            elif lines[position].startswith('"""'):177                incomment = '"""'178        else:179            if lines[position].endswith("'''"):  # pragma: no cover180                incomment = None181                position += 1182                break183            if lines[position].endswith('"""'):184                incomment = None185                position += 1186                break187        position += 1188    if position < len(lines):189        lines[position] = "{0}\n{1}".format(find, lines[position])190    return "\n".join(lines)191def py3to2_remove_raise_from(content):192    """193    Removes expression such as: ``raise Exception ("...") from e``.194    The function is very basic. It should be done with a grammar.195    @param      content     file content196    @return                 script197    """198    lines = content.split("\n")199    r = None200    for i, line in enumerate(lines):201        if " raise " in line:202            r = i203        if " from " in line and r is not None:204            spl = line.split(" from ")205            if len(spl[0].strip(" \n")) > 0:206                lines[i] = line = spl[0] + "# from " + " - ".join(spl[1:])207        if r is not None and i > r + 3:208            r = None209    return "\n".join(lines)210def py3to2_imported_local_modules(content, unittest_modules):211    """212    See function @see fn py3to2_convert_tree213    and documentation about parameter *unittest_modules*.214    @param      content             script or filename215    @param      unittest_modules    modules used during unit test but not installed,216                                    @see fn py3to2_convert_tree217    """218    lines = content.split("\n")219    for modname in unittest_modules:220        if isinstance(modname, tuple):221            modname, alias = modname  # pragma: no cover222        else:223            alias = modname224        s1 = '"{0}"'.format(modname)225        s2 = "'{0}'".format(modname)226        s3 = "import {0}".format(modname)227        s4 = '"{0}"'.format(modname.upper())228        s4_rep = '"{0}27"'.format(modname.upper())229        if (s1 in content or s2 in content or s4 in content) and s3 in content:230            for i, line in enumerate(lines):231                if " in " in line or "ModuleInstall" in line:232                    continue233                if s1 in line:234                    line = line.replace(235                        s1, '"..", "{0}", "dist_module27"'.format(alias))236                    lines[i] = line237                elif s2 in line:238                    line = line.replace(  # pragma: no cover239                        s2, "'..', '{0}', 'dist_module27'".format(alias))240                    lines[i] = line  # pragma: no cover241                elif s4 in line:242                    line = line.replace(s4, s4_rep)243                    lines[i] = line...

compat.py

Source:compat.py

...23        """Deprecated since RF 4.0. Use 'py3to2' instead."""24        if hasattr(cls, '__unicode__'):25            cls.__str__ = lambda self: unicode(self).encode('UTF-8')26        return cls27    def py3to2(cls):28        if ismethod(cls.__str__) and cls.__str__.im_func is not unicode_to_str:29            cls.__unicode__ = cls.__str__30            cls.__str__ = unicode_to_str31        if hasattr(cls, '__bool__'):32            cls.__nonzero__ = cls.__bool__33        return cls34    def unicode_to_str(self):35        return unicode(self).encode('UTF-8')36else:37    from inspect import unwrap38    from io import StringIO39    def py2to3(cls):40        """Deprecated since RF 4.0. Use 'py3to2' instead."""41        if hasattr(cls, '__unicode__'):42            cls.__str__ = lambda self: self.__unicode__()43        if hasattr(cls, '__nonzero__'):44            cls.__bool__ = lambda self: self.__nonzero__()45        return cls46    def py3to2(cls):47        return cls48# Copied from Jinja2, released under the BSD license.49# https://github.com/mitsuhiko/jinja2/blob/743598d788528921df825479d64f492ef60bef82/jinja2/_compat.py#L8850def with_metaclass(meta, *bases):51    """Create a base class with a metaclass."""52    # This requires a bit of explanation: the basic idea is to make a53    # dummy metaclass for one level of class instantiation that replaces54    # itself with the actual metaclass.55    class metaclass(type):56        def __new__(cls, name, this_bases, d):57            return meta(name, bases, d)58    return type.__new__(metaclass, 'temporary_class', (), {})59# On IronPython sys.stdxxx.isatty() always returns True60if not IRONPYTHON:...

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