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 updateManufactureSettings(cls, directory):
        #
        # Update manufacturer settings from the Gurux www server.
        #
        # directory: Target directory.
        #
        if sys.version_info >= (3, 0):
            return
        if not os.path.isdir(directory):
            os.mkdir(directory)
            if not os.path.isdir(directory):
                return
        path = os.path.join(directory, "files.xml")
        urllib.request.urlretrieve("https://www.gurux.fi/obis/files.xml", path)
        for it in ET.parse(path).iter():
            if it.tag == "File":
                path = os.path.join(directory, it.text)
                urllib.request.urlretrieve("https://www.gurux.fi/obis/" + it.text, path) 

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 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 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 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 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 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 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 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 _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 end_col_offset(self) -> Optional[int]:
        """End col offset: Python 3.8 will have this defined, in Python 3.7 it will be None."""
        ecol: Optional[int] = getattr(self.node, "end_col_offset", None)
        return ecol


####################################################################################################
# MUTATE AST Definitions
# Includes MutateBase and Mixins for 3.7 and 3.8 AST support
# MutateAST is constructed from Base + Mixins depending on sys.version_info
#################################################################################################### 

def test_create_mutant_with_cache(binop_file, stdoutIO):
    """Change ast.Add to ast.Mult in a mutation including pycache changes."""
    genome = Genome(source_file=binop_file)

    # this target is the add_five() function, changing add to mult
    end_lineno = None if sys.version_info < (3, 8) else 10
    end_col_offset = None if sys.version_info < (3, 8) else 16

    target_idx = LocIndex(
        ast_class="BinOp",
        lineno=10,
        col_offset=11,
        op_type=ast.Add,
        end_lineno=end_lineno,
        end_col_offset=end_col_offset,
    )
    mutation_op = ast.Mult

    mutant = genome.mutate(target_idx, mutation_op, write_cache=True)

    # uses the redirection for stdout to capture the value from the final output of binop_file
    with stdoutIO() as s:
        exec(mutant.mutant_code)
        assert int(s.getvalue()) == 25

    tag = sys.implementation.cache_tag
    expected_cfile = binop_file.parent / "__pycache__" / ".".join([binop_file.stem, tag, "pyc"])

    assert mutant.src_file == binop_file
    assert mutant.cfile == expected_cfile
    assert mutant.src_idx == target_idx 

def boolop_expected_loc():
    """Expected location index of the boolop fixture"""
    # Py 3.7 vs 3.8
    end_lineno = None if sys.version_info < (3, 8) else 2
    end_col_offset = None if sys.version_info < (3, 8) else 18
    return LocIndex(
        ast_class="BoolOp",
        lineno=2,
        col_offset=11,
        op_type=ast.And,
        end_lineno=end_lineno,
        end_col_offset=end_col_offset,
    ) 

def test_MutateAST_visit_binop_37(binop_file):
    """Read only test to ensure locations are aggregated."""
    tree = Genome(binop_file).ast

    # Py 3.7 vs. Py 3.8
    end_lineno = None if sys.version_info < (3, 8) else 6
    end_col_offset = None if sys.version_info < (3, 8) else 17

    test_idx = LocIndex(
        ast_class="BinOp",
        lineno=6,
        col_offset=11,
        op_type=ast.Add,
        end_lineno=end_lineno,
        end_col_offset=end_col_offset,
    )
    test_mutation = ast.Pow

    # apply the mutation to the original tree copy
    testing_tree = deepcopy(tree)
    mutated_tree = MutateAST(target_idx=test_idx, mutation=test_mutation).visit(testing_tree)

    # revisit in read-only mode to gather the locations of the new nodes
    mast = MutateAST(readonly=True)
    mast.visit(mutated_tree)

    # four locations from the binary operations in binop_file
    assert len(mast.locs) == 4

    # locs is an unordered set, cycle through to thd target and check the mutation
    for loc in mast.locs:
        if (
            loc.lineno == 6
            and loc.col_offset == 11
            and loc.end_lineno == end_lineno
            and loc.end_col_offset == end_col_offset
        ):
            assert loc.op_type == test_mutation 

def binop_Add_LocIdx():
    """Binop Add LocIdx as a target for mutations."""
    end_lineno = None if sys.version_info < (3, 8) else 10
    end_col_offset = None if sys.version_info < (3, 8) else 16
    return LocIndex(
        ast_class="BinOp",
        lineno=10,
        col_offset=11,
        op_type=ast.Add,
        end_lineno=end_lineno,
        end_col_offset=end_col_offset,
    ) 

def test_run_mutation_trials_bad_binop(
    bos, bod, exp_trials, parallel, single_binop_file_with_bad_test, change_to_tmp
):
    """Slow test to run detection trials on a simple mutation on a binop.

    Based on fixture, there is one Add operation, with 6 substitutions e.g.
    sub, div, mult, pow, mod, floordiv, therefore, 6 total trials are expected for a full run
    and 1 trial is expected when break on detected is used.

    Args:
        bos: break on survival
        bod: break on detection
        exp_trials: number of expected trials
        single_binop_file_with_good_test: fixture for single op with a good test
    """
    if sys.version_info < (3, 8) and parallel:
        pytest.skip("Under version 3.8 will not run parallel tests.")

    test_cmds = f"pytest {single_binop_file_with_bad_test.test_file.resolve()}".split()

    config = Config(
        n_locations=100, break_on_survival=bos, break_on_detected=bod, multi_processing=parallel
    )

    results_summary = run.run_mutation_trials(
        single_binop_file_with_bad_test.src_file.resolve(), test_cmds=test_cmds, config=config
    )

    assert len(results_summary.results) == exp_trials

    # in all trials the status should be survivors
    for mutant_trial in results_summary.results:
        assert mutant_trial.return_code == 0
        assert mutant_trial.status == "SURVIVED" 

def version():
        return ".".join(map(str, sys.version_info[:3])) 

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 pytest_ignore_collect(path, config):
    if "asyncio" in str(path):
        if sys.version_info < (3, 4, 0):
            return True 

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 _get_threading_ident():
    if sys.version_info >= (3, 3):
        return threading.get_ident()
    return threading._get_ident() 

def testToolWithConfig(self):
        if not sys.version_info >= (2, 5):
            return self.skip('skipped (Python 2.5+ only)')

        self.getPage('/tooldecs/blah')
        self.assertHeader('Content-Type', 'application/data') 

def testKeywords(self):
        if sys.version_info < (3,):
            return self.skip('skipped (Python 3 only)')
        exec("""class Root(object):
    @cherrypy.expose
    def hello(self, *, name='world'):
        return 'Hello %s!' % name
cherrypy.tree.mount(Application(Root(), '/keywords'))""")

        self.getPage('/keywords/hello')
        self.assertStatus(200)
        self.getPage('/keywords/hello/extra')
        self.assertStatus(404)