Python sys.version_info() Examples

def write_cov_file(line_data: Dict[str, List[int]], fname: str) -> None:
    """Write a coverage file supporting both Coverage v4 and v5.

    Args:
        line_data: Dictionary of line data for the coverage file.
        fname: string filename for output location (absolute path)

    Returns:
        None
    """
    if coverage.version_info[0] == 4:
        covdata = coverage.CoverageData()
        covdata.add_lines(line_data)
        covdata.write_file(fname)

    else:
        # assume coverage v 5
        covdata = coverage.CoverageData(basename=fname)
        covdata.add_lines(line_data)
        covdata.write()


####################################################################################################
# CLI: MOCK ARGS
#################################################################################################### 

def isUpdatesAvailable(cls, path):
        if sys.version_info < (3, 0):
            return False
        # pylint: disable=broad-except
        if not os.path.isfile(os.path.join(path, "files.xml")):
            return True
        try:
            available = dict()
            for it in ET.parse(os.path.join(path, "files.xml")).iter():
                if it.tag == "File":
                    available[it.text] = datetime.datetime.strptime(it.attrib["Modified"], "%d-%m-%Y")

            path = NamedTemporaryFile()
            path.close()
            urllib.request.urlretrieve("https://www.gurux.fi/obis/files.xml", path.name)
            for it in ET.parse(path.name).iter():
                if it.tag == "File":
                    tmp = datetime.datetime.strptime(it.attrib["Modified"], "%d-%m-%Y")
                    if not it.text in available or available[it.text] != tmp:
                        return True
        except Exception as e:
            print(e)
            return True
        return False 

def _prepare_signable_fields(
        valid_field_order,  # type: Sequence[str]
        data_fields,  # type: Mapping[str, str]
):  # type: (...) -> SignableFields
    """
    Prepare PayFast submission variables for signing, using the given field order.

    :raise ValueError:
        If `data_fields` contains any unexpected field names not in `valid_field_order`.
    """
    present_fields = (set(data_fields.keys()) if sys.version_info < (3,) else
                      data_fields.keys())
    extra_fields = present_fields - set(valid_field_order)
    if extra_fields:
        raise ValueError('Data contains unexpected fields: {!r}'.format(extra_fields))

    return [
        (name, data_fields[name]) for name in valid_field_order
        if name in data_fields
    ] 

def wr( self, str ):
    if ( self.debug ):
      print("FT600_WR:" +  str );
    str = "~".join( str );# only using 8bits of 16bit FT600, so pad with ~
    bytes_to_write = len( str );# str is now "~1~2~3 .. ~e~f" - Twice as long
    channel = 0;
    result = False;
    timeout = 5;
    tx_pipe = 0x02 + channel;
    if sys.platform == 'linux2':
      tx_pipe -= 0x02;
    if ( sys.version_info.major == 3 ):
      str = str.encode('latin1');
    xferd = 0
    while ( xferd != bytes_to_write ):
      # write data to specified pipe
      xferd += self.D3XX.writePipe(tx_pipe,str,bytes_to_write-xferd);
    return; 

def test_recordio():
    frec = tempfile.mktemp()
    N = 255

    writer = mx.recordio.MXRecordIO(frec, 'w')
    for i in range(N):
        if sys.version_info[0] < 3:
            writer.write(str(chr(i)))
        else:
            writer.write(bytes(str(chr(i)), 'utf-8'))
    del writer

    reader = mx.recordio.MXRecordIO(frec, 'r')
    for i in range(N):
        res = reader.read()
        if sys.version_info[0] < 3:
            assert res == str(chr(i))
        else:
            assert res == bytes(str(chr(i)), 'utf-8') 

def test_indexed_recordio():
    fidx = tempfile.mktemp()
    frec = tempfile.mktemp()
    N = 255

    writer = mx.recordio.MXIndexedRecordIO(fidx, frec, 'w')
    for i in range(N):
        if sys.version_info[0] < 3:
            writer.write_idx(i, str(chr(i)))
        else:
            writer.write_idx(i, bytes(str(chr(i)), 'utf-8'))
    del writer

    reader = mx.recordio.MXIndexedRecordIO(fidx, frec, 'r')
    keys = reader.keys
    assert sorted(keys) == [i for i in range(N)]
    random.shuffle(keys)
    for i in keys:
        res = reader.read_idx(i)
        if sys.version_info[0] < 3:
            assert res == str(chr(i))
        else:
            assert res == bytes(str(chr(i)), 'utf-8') 

def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
                env=None):
    """Call the given command(s)."""
    assert isinstance(commands, list)
    p = None
    for c in commands:
        try:
            dispcmd = str([c] + args)
            # remember shell=False, so use git.cmd on windows, not just git
            p = subprocess.Popen([c] + args, cwd=cwd, env=env,
                                 stdout=subprocess.PIPE,
                                 stderr=(subprocess.PIPE if hide_stderr
                                         else None))
            break
        except EnvironmentError:
            e = sys.exc_info()[1]
            if e.errno == errno.ENOENT:
                continue
            if verbose:
                print("unable to run %s" % dispcmd)
                print(e)
            return None, None
    else:
        if verbose:
            print("unable to find command, tried %s" % (commands,))
        return None, None
    stdout = p.communicate()[0].strip()
    if sys.version_info[0] >= 3:
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %s (error)" % dispcmd)
            print("stdout was %s" % stdout)
        return None, p.returncode
    return stdout, p.returncode 

def test_kernel_error_checking():
    # Running tests that may throw exceptions out of worker threads will stop CI testing
    # if not run in a separate process (with its own address space for CUDA compatibility).
    try:
        mpctx = mp.get_context('spawn')
    except:
        print('SKIP: python%s.%s lacks the required process fork-exec support ... ' %
              sys.version_info[0:2], file=sys.stderr, end='')
    else:
        with discard_stderr():
            for f in [kernel_error_check_imperative, kernel_error_check_symbolic]:
                p = mpctx.Process(target=f)
                p.start()
                p.join()
                assert p.exitcode != 0,\
                    "Expected a synchronous kernel error from %s(), none seen." % f.__name__ 

def test_syntax(self):
        if sys.version_info < (3,):
            return self.skip('skipped (Python 3 only)')
        code = textwrap.dedent("""
            class Root:
                @cherrypy.expose
                @cherrypy.tools.params()
                def resource(self, limit: int):
                    return type(limit).__name__
            conf = {'/': {'tools.params.on': True}}
            cherrypy.tree.mount(Root(), config=conf)
            """)
        exec(code)

        self.getPage('/resource?limit=0')
        self.assertStatus(200)
        self.assertBody('int') 

def stats(self, filename, sortby='cumulative'):
        """:rtype stats(index): output of print_stats() for the given profile.
        """
        sio = io.StringIO()
        if sys.version_info >= (2, 5):
            s = pstats.Stats(os.path.join(self.path, filename), stream=sio)
            s.strip_dirs()
            s.sort_stats(sortby)
            s.print_stats()
        else:
            # pstats.Stats before Python 2.5 didn't take a 'stream' arg,
            # but just printed to stdout. So re-route stdout.
            s = pstats.Stats(os.path.join(self.path, filename))
            s.strip_dirs()
            s.sort_stats(sortby)
            oldout = sys.stdout
            try:
                sys.stdout = sio
                s.print_stats()
            finally:
                sys.stdout = oldout
        response = sio.getvalue()
        sio.close()
        return response 

def build_Call(self, o):
        if sys.version_info >= (3, 5):
            return self._build_call35(o)

        callee = self.build(o.func)

        if o.args is None:
            args = ()
        else:
            args = tuple([self.build(a) for a in o.args])

        if o.starargs is None:
            starargs = ()
        else:
            starargs = tuple(self.build(o.starargs))

        if o.kwargs is None:
            kwargs = {}
        else:
            kwargs = self.build(o.kwargs)
        if o.keywords is not None:  # direct a=b keywords
            for kw in o.keywords:
                # preference because is a direct keyword against **kwargs
                kwargs[kw.arg] = self.build(kw.value)
        return callee(*(args + starargs), **kwargs) 

def get_raw(stocks) -> dict:
    req = requests.Session()
    req.get(SESSION_URL, proxies=get_proxies())

    r = req.get(
        STOCKINFO_URL.format(
            stock_id=_join_stock_id(stocks),
            time=int(time.time()) * 1000))

    if sys.version_info < (3, 5):
        try:
            return r.json()
        except ValueError:
            return {'rtmessage': 'json decode error', 'rtcode': '5000'}
    else:
        try:
            return r.json()
        except json.decoder.JSONDecodeError:
            return {'rtmessage': 'json decode error', 'rtcode': '5000'} 

def download_dataset(path, source='https://www.cs.toronto.edu/~kriz/'
                                  'cifar-10-python.tar.gz'):
    """
    Downloads and extracts the dataset, if needed.
    """
    files = ['data_batch_%d' % (i + 1) for i in range(5)] + ['test_batch']
    for fn in files:
        if not os.path.exists(os.path.join(path, 'cifar-10-batches-py', fn)):
            break  # at least one file is missing
    else:
        return  # dataset is already complete

    print("Downloading and extracting %s into %s..." % (source, path))
    if sys.version_info[0] == 2:
        from urllib import urlopen
    else:
        from urllib.request import urlopen
    import tarfile
    if not os.path.exists(path):
        os.makedirs(path)
    u = urlopen(source)
    with tarfile.open(fileobj=u, mode='r|gz') as f:
        f.extractall(path=path)
    u.close() 

def is_payfast_ip_address(ip_address_str):
    """
    Return True if ip_address_str matches one of PayFast's server IP addresses.

    Setting: `PAYFAST_IP_ADDRESSES`

    :type ip_address_str: str
    :rtype: bool
    """
    # TODO: Django system check for validity?
    payfast_ip_addresses = getattr(settings, 'PAYFAST_IP_ADDRESSES',
                                   conf.DEFAULT_PAYFAST_IP_ADDRESSES)

    if sys.version_info < (3,):
        # Python 2 usability: Coerce str to unicode, to avoid very common TypeErrors.
        # (On Python 3, this should generally not happen:
        #  let unexpected bytes values fail as expected.)
        ip_address_str = unicode(ip_address_str)  # noqa: F821
        payfast_ip_addresses = [unicode(address) for address in payfast_ip_addresses]  # noqa: F821

    return any(ip_address(ip_address_str) in ip_network(payfast_address)
               for payfast_address in payfast_ip_addresses) 

def hex(cls, value, addSpace=True, index=0, count=None):
        """
        Convert byte array to hex string.
        """
        #Return empty string if array is empty.
        if not value:
            return ""
        hexChars = ""
        #Python 2.7 handles bytes as a string array. It's changed to bytearray.
        if sys.version_info < (3, 0) and not isinstance(value, bytearray):
            value = bytearray(value)
        if count is None:
            count = len(value)
        for it in value[index:count]:
            hexChars += GXByteBuffer.__HEX_ARRAY[it >> GXByteBuffer.__NIBBLE]
            hexChars += GXByteBuffer.__HEX_ARRAY[it & GXByteBuffer.__LOW_BYTE_PART]
            if addSpace:
                hexChars += ' '
        return hexChars.strip() 

def copystat(src, dst, follow_symlinks=True, **kwargs):
    """
    Copy the read only attribute, last access time, and last modification time from src to dst. The file contents,
    owner, and group are unaffected.

    If follow_symlinks is 'False' and src and dst both refer to symbolic links, copystat() will operate on the
    symbolic links themselves rather than the files the symbolic links refer to.

    :param src: The src file or directory to copy the read only flag from.
    :param dst: The dst file or directory to copy the read only flag to.
    :param follow_symlinks: Whether to copy the read only flag on the symlink or the target of the symlink.
    :param kwargs: Common arguments used to build the SMB Session for any UNC paths.
    """
    src_stat = _get_file_stat(src, follow_symlinks, **kwargs)
    src_mode = stat.S_IMODE(src_stat.st_mode)

    # *_ns was only added in Python 3, fallback to a manual calculation from seconds since EPOCH.
    atime_ns = getattr(src_stat, 'st_atime_ns', src_stat.st_atime * 1000000000)
    mtime_ns = getattr(src_stat, 'st_mtime_ns', src_stat.st_mtime * 1000000000)

    norm_dst = ntpath.normpath(dst)
    if norm_dst.startswith('\\\\'):
        read_only = not (src_mode & stat.S_IWRITE == stat.S_IWRITE and src_mode & stat.S_IREAD == stat.S_IREAD)
        _set_file_basic_info(dst, follow_symlinks, read_only=read_only, atime_ns=atime_ns, mtime_ns=mtime_ns, **kwargs)
    else:
        if not follow_symlinks and sys.version_info[0] < 3:
            # Python 2 always follows symlinks and does not have a kwarg to override, we can only just fail here.
            raise NotImplementedError("utime: follow_symlinks unavailable on this platform")

        _local_chmod(dst, src_mode, follow_symlinks)

        if sys.version_info[0] < 3:
            os.utime(dst, (atime_ns / 1000000000, mtime_ns / 1000000000))
        else:
            os.utime(dst, ns=(atime_ns, mtime_ns), follow_symlinks=follow_symlinks) 

def makedirs(d):
    """Create directories recursively if they don't exist. os.makedirs(exist_ok=True) is not
    available in Python2"""
    if sys.version_info[0] < 3:
        from distutils.dir_util import mkpath
        mkpath(d)
    else:
        os.makedirs(d, exist_ok=True)  # pylint: disable=unexpected-keyword-arg 

def _local_chmod(path, mode, follow_symlinks):
    if sys.version_info[0] < 3:
        if not follow_symlinks:
            if not hasattr(os, 'lchmod'):
                raise NotImplementedError("chmod: follow_symlinks unavailable on this platform")
            os.lchmod(path, mode)
        else:
            os.chmod(path, mode)
    else:
        os.chmod(path, mode, follow_symlinks=follow_symlinks) 

def write_bits_to_stream_object( self, fp ):                       
        '''
        You can write a bitvector directly to a stream object, as
        illustrated by:

            fp_write = io.StringIO()
            bitvec.write_bits_to_stream_object(fp_write)
            print(fp_write.getvalue())   

        This method does not return anything. 

        This function is meant to write a bitvector directly to a file like
        object.  Note that whereas 'write_to_file' method creates a memory
        footprint that corresponds exactly to the bitvector, the
        'write_bits_to_stream_object' actually writes out the 1's and 0's
        as individual items to the file object.  That makes this method
        convenient for creating a string representation of a bitvector,
        especially if you use the StringIO class, as shown in the test
        code.

        '''
        for bit_index in range(self.size):                          
            if sys.version_info[0] == 3:                            
                if self[bit_index] == 0:                            
                    if sys.version_info[1] == 5 and sys.version_info[2] <= 2:
                        fp.write( str('0') )                            
                    else:
                        fp.write( b'0' )                            
                else:                                               
                    if sys.version_info[1] == 5 and sys.version_info[2] <= 2:
                        fp.write( str('1') )                            
                    else:
                        fp.write( b'1' )                            
            else:                                                   
                if self[bit_index] == 0:                            
                    fp.write( unicode('0') )                        
                else:                                               
                    fp.write( unicode('1') ) 

def test_py37_above(self, mocker):
        target_typ = int

        mocker.patch("{}._sys".format(TARGET_MODULE), version_info=(3, 7))

        built_typ = mocker.patch(
            "{}._typing._GenericAlias".format(TARGET_MODULE),
            create=True, _name="List", __args__=[target_typ])

        if sys.version_info >= (3, 0):
            mocker.patch("builtins.type", create=True, return_value=built_typ)
        else:
            mocker.patch("__builtin__.type", create=True, return_value=built_typ)

        assert _arm.detect_list_type(built_typ) == target_typ 

def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False, env=None):
    """Call the given command(s)."""
    assert isinstance(commands, list)
    p = None
    for c in commands:
        try:
            dispcmd = str([c] + args)
            # remember shell=False, so use git.cmd on windows, not just git
            p = subprocess.Popen(
                [c] + args, cwd=cwd, env=env, stdout=subprocess.PIPE, stderr=(subprocess.PIPE if hide_stderr else None)
            )
            break
        except EnvironmentError:
            e = sys.exc_info()[1]
            if e.errno == errno.ENOENT:
                continue
            if verbose:
                print("unable to run %s" % dispcmd)
                print(e)
            return None, None
    else:
        if verbose:
            print("unable to find command, tried %s" % (commands,))
        return None, None
    stdout = p.communicate()[0].strip()
    if sys.version_info[0] >= 3:
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %s (error)" % dispcmd)
            print("stdout was %s" % stdout)
        return None, p.returncode
    return stdout, p.returncode 

def write_bits_to_stream_object_old( self, fp ):                       
        '''
        You can write a bitvector directly to a stream object, as
        illustrated by:

            fp_write = io.StringIO()
            bitvec.write_bits_to_stream_object(fp_write)
            print(fp_write.getvalue())   

        This method does not return anything. 

        This function is meant to write a bitvector directly to a file like
        object.  Note that whereas 'write_to_file' method creates a memory
        footprint that corresponds exactly to the bitvector, the
        'write_bits_to_stream_object' actually writes out the 1's and 0's as
        individual items to the file object.  That makes this method
        convenient for creating a string representation of a bitvector,
        especially if you use the StringIO class, as shown in the test
        code.
        '''
        for bit_index in range(self.size):                          
            if sys.version_info[0] == 3:                            
                if self[bit_index] == 0:                            
                    fp.write( str('0') )                            
                else:                                               
                    fp.write( str('1') )                            
            else:                                                   
                if self[bit_index] == 0:                            
                    fp.write( unicode('0') )                        
                else:                                               
                    fp.write( unicode('1') ) 

def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
                env=None):
    """Call the given command(s)."""
    assert isinstance(commands, list)
    p = None
    for c in commands:
        try:
            dispcmd = str([c] + args)
            # remember shell=False, so use git.cmd on windows, not just git
            p = subprocess.Popen([c] + args, cwd=cwd, env=env,
                                 stdout=subprocess.PIPE,
                                 stderr=(subprocess.PIPE if hide_stderr
                                         else None))
            break
        except EnvironmentError:
            e = sys.exc_info()[1]
            if e.errno == errno.ENOENT:
                continue
            if verbose:
                print("unable to run %s" % dispcmd)
                print(e)
            return None, None
    else:
        if verbose:
            print("unable to find command, tried %s" % (commands,))
        return None, None
    stdout = p.communicate()[0].strip()
    if sys.version_info[0] >= 3:
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %s (error)" % dispcmd)
            print("stdout was %s" % stdout)
        return None, p.returncode
    return stdout, p.returncode 

def run_command(commands, args, cwd=None, verbose=False, hide_stderr=False,
                env=None):
    """Call the given command(s)."""
    assert isinstance(commands, list)
    p = None
    for c in commands:
        try:
            dispcmd = str([c] + args)
            # remember shell=False, so use git.cmd on windows, not just git
            p = subprocess.Popen([c] + args, cwd=cwd, env=env,
                                 stdout=subprocess.PIPE,
                                 stderr=(subprocess.PIPE if hide_stderr
                                         else None))
            break
        except EnvironmentError:
            e = sys.exc_info()[1]
            if e.errno == errno.ENOENT:
                continue
            if verbose:
                print("unable to run %s" % dispcmd)
                print(e)
            return None, None
    else:
        if verbose:
            print("unable to find command, tried %s" % (commands,))
        return None, None
    stdout = p.communicate()[0].strip()
    if sys.version_info[0] >= 3:
        stdout = stdout.decode()
    if p.returncode != 0:
        if verbose:
            print("unable to run %s (error)" % dispcmd)
            print("stdout was %s" % stdout)
        return None, p.returncode
    return stdout, p.returncode 

def test_py2(self, mocker):
        mocker.patch("{}._sys".format(TARGET_MODULE), version_info=(2, 7))
        assert not _arm.is_type_variable(None) 

def test_py30_to_36_with_type_exception(self, mocker):
        target_typ = int

        mocker.patch("{}._sys".format(TARGET_MODULE), version_info=(3, 0))

        built_typ = mocker.MagicMock(__origin__=typing.List, __args__=[target_typ])

        #FIXME: Investigate this test in Python 3.6
        #assert _arm.is_type_variable(built_typ) 

def test_py30_to_36(self, mocker):
        target_typ = int

        mocker.patch("{}._sys".format(TARGET_MODULE), version_info=(3, 0))

        built_typ = mocker.patch(
            "{}._typing.GenericMeta".format(TARGET_MODULE),
            create=True, __extra__=list, __args__=[target_typ])

        mocker.patch("{}.type".format(TARGET_MODULE), return_value=built_typ)

        #FIXME: Investigate this test in Python 3.6
        #assert _arm.is_type_variable(built_typ) 

def test_py30_to_36_with_type_exception(self, mocker):
        target_typ = int

        mocker.patch("{}._sys".format(TARGET_MODULE), version_info=(3, 0))

        built_typ = mocker.patch(
            "{}._typing.GenericMeta".format(TARGET_MODULE),
            create=True, __origin__=typing.List, __args__=[target_typ])

        mocker.patch("{}.type".format(TARGET_MODULE), side_effect=AttributeError())

        assert _arm.detect_list_type(built_typ) == target_typ 

def test_py30_to_36(self, mocker):
        target_typ = int

        mocker.patch("{}._sys".format(TARGET_MODULE), version_info=(3, 0))

        built_typ = mocker.patch(
            "{}._typing.GenericMeta".format(TARGET_MODULE),
            create=True, __extra__=list, __args__=[target_typ])

        mocker.patch("{}.type".format(TARGET_MODULE), return_value=built_typ)

        assert _arm.detect_list_type(built_typ) == target_typ 

def read(self, config_file):
        """
            Read a configuration file in ini format

            @attention: config_file argument may be file path or stream.

            @param config_file: file handler or file path to a config file
            @type config_file: file | FileIO | StringIO

            @rtype: None
        """
        assert isinstance(config_file, str) or self.is_stream(config_file), "Invalid config file path: {}".format(config_file)
        if isinstance(config_file, str) and not os.path.isfile(config_file):
            self._logger.error("Config file does not exist: '{}'".format(config_file))
            raise Exception("File does not exist")

        if isinstance(config_file, str):
            self._config.read(config_file)
            self._config_file_path = config_file
        elif self.is_stream(config_file):
            if sys.version_info < (3,):
                self._config.readfp(config_file)
            else:
                self._config.read_file(config_file)
            self._config_file_path = config_file.name
        else:
            self._logger.error("Invalid config file argument '{}'".format(config_file))
            raise Exception("Unknown argument")