_is_defined_in() - Code Metrics - Inspection of "Sils/formakema" - coala-analyzer/coala - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#2345)

by Mischa

created 2016-06-26 12:40 UTC

_is_defined_in() A

↳ Parent: Project

Complexity

Conditions

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Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	4
dl	0
loc	15
rs	9.2
c	0
b	0
f	0

from contextlib import ExitStack
import inspect
import os
import platform
import sys

from coalib.misc.ContextManagers import suppress_stdout
from coala_decorators.decorators import arguments_to_lists, yield_once


def _import_module(file_path):
    if not os.path.exists(file_path):
        raise ImportError

    module_name = os.path.splitext(os.path.basename(file_path))[0]
    module_dir = os.path.dirname(file_path)

    if module_dir not in sys.path:
        sys.path.insert(0, module_dir)

    # Ugly inconsistency: Python will insist on correctly cased module names
    # independent of whether the OS is case-sensitive or not.
    # We want all cases to match though.
    if platform.system() == 'Windows':  # pragma: nocover
        for cased_file_path in os.listdir(module_dir):
            cased_module_name = os.path.splitext(cased_file_path)[0]
            if cased_module_name.lower() == module_name.lower():
                module_name = cased_module_name
                break

    return __import__(module_name)


def _is_subclass(test_class, superclasses):
    for superclass in superclasses:
        try:
            if issubclass(test_class, superclass):
                return True
        except TypeError:
            pass
    return False


def _has_all(obj, attribute_names):
    for attribute_name in attribute_names:
        if not hasattr(obj, attribute_name):
            return False
    return True


def object_defined_in(obj, file_path):
    """
    Check if the object is defined in the given file.

    >>> object_defined_in(object_defined_in, __file__)
    True
    >>> object_defined_in(object_defined_in, "somewhere else")
    False

    Builtins are always defined outside any given file:

    >>> object_defined_in(False, __file__)
    False

    :param obj:       The object to check.
    :param file_path: The path it might be defined in.
    :return:          True if the object is defined in the file.
    """
    try:
        source = inspect.getfile(obj)
        if (platform.system() == 'Windows' and
                source.lower() == file_path.lower() or
                source == file_path):
            return True
    except TypeError:  # Builtin values don't have a source location
        pass

    return False


def _is_defined_in(obj, file_path):
    """
    Check if a class is defined in the given file.

    Any class is considered to be defined in the given file if any of it's
    parent classes or the class itself is defined in it.
    """
    if not inspect.isclass(obj):
        return object_defined_in(obj, file_path)

    for base in inspect.getmro(obj):
        if object_defined_in(base, file_path):
            return True

    return False


@arguments_to_lists
@yield_once
def _iimport_objects(file_paths, names, types, supers, attributes, local):
    """
    Import all objects from the given modules that fulfill the requirements

    :param file_paths: File path(s) from which objects will be imported
    :param names:      Name(s) an objects need to have one of
    :param types:      Type(s) an objects need to be out of
    :param supers:     Class(es) objects need to be a subclass of
    :param attributes: Attribute(s) an object needs to (all) have
    :param local:      if True: Objects need to be defined in the file they
                       appear in to be collected
    :return:           iterator that yields all matching python objects
    :raises Exception: Any exception that is thrown in module code or an
                       ImportError if paths are erroneous.
    """
    if not file_paths or (not names and
                          not types and
                          not supers and
                          not attributes):
        return

    for file_path in file_paths:
        module = _import_module(file_path)
        for obj_name, obj in inspect.getmembers(module):
            if ((not names or obj_name in names) and
                    (not types or isinstance(obj, tuple(types))) and
                    (not supers or _is_subclass(obj, supers)) and
                    (not attributes or _has_all(obj, attributes)) and
                    (local[0] is False or _is_defined_in(obj, file_path))):
                yield obj


def iimport_objects(file_paths, names=None, types=None, supers=None,
                    attributes=None, local=False, suppress_output=False):
    """
    Import all objects from the given modules that fulfill the requirements

    :param file_paths:
        File path(s) from which objects will be imported.
    :param names:
        Name(s) an objects need to have one of.
    :param types:
        Type(s) an objects need to be out of.
    :param supers:
        Class(es) objects need to be a subclass of.
    :param attributes:
        Attribute(s) an object needs to (all) have.
    :param local:
        If True: Objects need to be defined in the file they appear in to be
        collected.
    :param suppress_output:
        Whether console output from stdout shall be suppressed or not.
    :return:
        An iterator that yields all matching python objects.
    :raises Exception:
        Any exception that is thrown in module code or an ImportError if paths
        are erroneous.
    """
    with ExitStack() as stack:
        if not suppress_output:
            stack.enter_context(suppress_stdout())

        yield from _iimport_objects(file_paths, names, types, supers,
                                    attributes, local)


def import_objects(file_paths, names=None, types=None, supers=None,
                   attributes=None, local=False, verbose=False):
    """
    Import all objects from the given modules that fulfill the requirements

    :param file_paths: File path(s) from which objects will be imported
    :param names:      Name(s) an objects need to have one of
    :param types:      Type(s) an objects need to be out of
    :param supers:     Class(es) objects need to be a subclass of
    :param attributes: Attribute(s) an object needs to (all) have
    :param local:      if True: Objects need to be defined in the file they
                       appear in to be collected
    :return:           list of all matching python objects
    :raises Exception: Any exception that is thrown in module code or an
                       ImportError if paths are erroneous.
    """
    return list(iimport_objects(file_paths, names, types, supers, attributes,
                                local, verbose))


1			from contextlib import ExitStack
2			import inspect
3			import os
4			import platform
5			import sys
6
7			from coalib.misc.ContextManagers import suppress_stdout
8			from coala_decorators.decorators import arguments_to_lists, yield_once
9
10
11			def _import_module(file_path):
12			if not os.path.exists(file_path):
13			raise ImportError
14
15			module_name = os.path.splitext(os.path.basename(file_path))[0]
16			module_dir = os.path.dirname(file_path)
17
18			if module_dir not in sys.path:
19			sys.path.insert(0, module_dir)
20
21			# Ugly inconsistency: Python will insist on correctly cased module names
22			# independent of whether the OS is case-sensitive or not.
23			# We want all cases to match though.
24			if platform.system() == 'Windows': # pragma: nocover
25			for cased_file_path in os.listdir(module_dir):
26			cased_module_name = os.path.splitext(cased_file_path)[0]
27			if cased_module_name.lower() == module_name.lower():
28			module_name = cased_module_name
29			break
30
31			return __import__(module_name)
32
33
34			def _is_subclass(test_class, superclasses):
35			for superclass in superclasses:
36			try:
37			if issubclass(test_class, superclass):
38			return True
39			except TypeError:
40			pass
41			return False
42
43
44			def _has_all(obj, attribute_names):
45			for attribute_name in attribute_names:
46			if not hasattr(obj, attribute_name):
47			return False
48			return True
49
50
51			def object_defined_in(obj, file_path):
52			"""
53			Check if the object is defined in the given file.
54
55			>>> object_defined_in(object_defined_in, __file__)
56			True
57			>>> object_defined_in(object_defined_in, "somewhere else")
58			False
59
60			Builtins are always defined outside any given file:
61
62			>>> object_defined_in(False, __file__)
63			False
64
65			:param obj: The object to check.
66			:param file_path: The path it might be defined in.
67			:return: True if the object is defined in the file.
68			"""
69			try:
70			source = inspect.getfile(obj)
71			if (platform.system() == 'Windows' and
72			source.lower() == file_path.lower() or
73			source == file_path):
74			return True
75			except TypeError: # Builtin values don't have a source location
76			pass
77
78			return False
79
80
81			def _is_defined_in(obj, file_path):
82			"""
83			Check if a class is defined in the given file.
84
85			Any class is considered to be defined in the given file if any of it's
86			parent classes or the class itself is defined in it.
87			"""
88			if not inspect.isclass(obj):
89			return object_defined_in(obj, file_path)
90
91			for base in inspect.getmro(obj):
92			if object_defined_in(base, file_path):
93			return True
94
95			return False
96
97
98			@arguments_to_lists
99			@yield_once
100			def _iimport_objects(file_paths, names, types, supers, attributes, local):
101			"""
102			Import all objects from the given modules that fulfill the requirements
103
104			:param file_paths: File path(s) from which objects will be imported
105			:param names: Name(s) an objects need to have one of
106			:param types: Type(s) an objects need to be out of
107			:param supers: Class(es) objects need to be a subclass of
108			:param attributes: Attribute(s) an object needs to (all) have
109			:param local: if True: Objects need to be defined in the file they
110			appear in to be collected
111			:return: iterator that yields all matching python objects
112			:raises Exception: Any exception that is thrown in module code or an
113			ImportError if paths are erroneous.
114			"""
115			if not file_paths or (not names and
116			not types and
117			not supers and
118			not attributes):
119			return
120
121			for file_path in file_paths:
122			module = _import_module(file_path)
123			for obj_name, obj in inspect.getmembers(module):
124			if ((not names or obj_name in names) and
125			(not types or isinstance(obj, tuple(types))) and
126			(not supers or _is_subclass(obj, supers)) and
127			(not attributes or _has_all(obj, attributes)) and
128			(local[0] is False or _is_defined_in(obj, file_path))):
129			yield obj
130
131
132			def iimport_objects(file_paths, names=None, types=None, supers=None,
133			attributes=None, local=False, suppress_output=False):
134			"""
135			Import all objects from the given modules that fulfill the requirements
136
137			:param file_paths:
138			File path(s) from which objects will be imported.
139			:param names:
140			Name(s) an objects need to have one of.
141			:param types:
142			Type(s) an objects need to be out of.
143			:param supers:
144			Class(es) objects need to be a subclass of.
145			:param attributes:
146			Attribute(s) an object needs to (all) have.
147			:param local:
148			If True: Objects need to be defined in the file they appear in to be
149			collected.
150			:param suppress_output:
151			Whether console output from stdout shall be suppressed or not.
152			:return:
153			An iterator that yields all matching python objects.
154			:raises Exception:
155			Any exception that is thrown in module code or an ImportError if paths
156			are erroneous.
157			"""
158			with ExitStack() as stack:
159			if not suppress_output:
160			stack.enter_context(suppress_stdout())
161
162			yield from _iimport_objects(file_paths, names, types, supers,
163			attributes, local)
164
165
166			def import_objects(file_paths, names=None, types=None, supers=None,
167			attributes=None, local=False, verbose=False):
168			"""
169			Import all objects from the given modules that fulfill the requirements
170
171			:param file_paths: File path(s) from which objects will be imported
172			:param names: Name(s) an objects need to have one of
173			:param types: Type(s) an objects need to be out of
174			:param supers: Class(es) objects need to be a subclass of
175			:param attributes: Attribute(s) an object needs to (all) have
176			:param local: if True: Objects need to be defined in the file they
177			appear in to be collected
178			:return: list of all matching python objects
179			:raises Exception: Any exception that is thrown in module code or an
180			ImportError if paths are erroneous.
181			"""
182			return list(iimport_objects(file_paths, names, types, supers, attributes,
183			local, verbose))
184

coala-analyzer / coala

Pull Request — master (#2345)

_is_defined_in() A

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