Address all collections.abc DeprecationWarnings

flex/_compat.py

@@ -0,0 +1,5 @@
+"""Python 2/3 compatibility module."""
+try:
+    from collections.abc import Mapping, Sequence  # noqa: F401
+except ImportError:  # Python 2
+    from collections import Mapping, Sequence  # noqa: F401

flex/constants.py

@@ -1,12 +1,10 @@
 from __future__ import unicode_literals
 
 import numbers
-try:
-    from collections.abc import Sequence, Mapping
-except ImportError:  # Python 2
-    from collections import Sequence, Mapping
 import six
 
+from flex._compat import Sequence, Mapping
+
 
 SCHEMES = (
     'http', 'https', 'ws', 'wss',

flex/core.py

@@ -2,14 +2,14 @@
 
 from six.moves import urllib_parse as urlparse
 import os
-import collections
 import requests
 from copy import deepcopy
 
 import six
 import json
 import yaml
 
+from flex._compat import Mapping
 from flex.context_managers import ErrorDict
 from flex.exceptions import ValidationError
 from flex.loading.definitions import (
@@ -42,7 +42,7 @@ def load_source(source):
         - json string.
         - yaml string.
     """
-    if isinstance(source, collections.Mapping):
+    if isinstance(source, Mapping):
         return deepcopy(source)
     elif hasattr(source, 'read') and callable(source.read):
         raw_source = source.read()

flex/datastructures.py

@@ -1,5 +1,6 @@
 import collections
 
+from flex._compat import Mapping
 from flex.exceptions import (
     ValidationError,
     ErrorDict,
@@ -28,7 +29,7 @@ def __init__(self, value=None):
 
     def add_validator(self, validator):
         if is_non_string_iterable(validator)\
-           and not isinstance(validator, collections.Mapping):
+           and not isinstance(validator, Mapping):
             for value in validator:
                 self.add_validator(value)
         else:
@@ -50,7 +51,7 @@ class ValidationDict(collections.defaultdict):
     def __init__(self, validators=None):
         super(ValidationDict, self).__init__(ValidationList)
         if validators is not None:
-            if not isinstance(validators, collections.Mapping):
+            if not isinstance(validators, Mapping):
                 raise ValueError("ValidationDict may only be instantiated with a mapping")
             for key, validator in validators.items():
                 self.add_validator(key, validator)

flex/exceptions.py

@@ -3,6 +3,7 @@
 import six
 import collections
 
+from flex._compat import Mapping
 from flex.utils import (
     is_non_string_iterable,
     prettify_errors,
@@ -37,7 +38,7 @@ def add_error(self, error):
 
         Otherwise, the value is appended.
         """
-        if is_non_string_iterable(error) and not isinstance(error, collections.Mapping):
+        if is_non_string_iterable(error) and not isinstance(error, Mapping):
             for value in error:
                 self.add_error(value)
         else:
@@ -56,13 +57,13 @@ def add_error(self, key, error):
 
 class ValidationError(ValueError):
     def __init__(self, error):
-        if not isinstance(error, collections.Mapping) and \
+        if not isinstance(error, Mapping) and \
            is_non_string_iterable(error) and \
            len(error) == 1:
             error = error[0]
         self._error = error
 
-        if isinstance(self._error, collections.Mapping):
+        if isinstance(self._error, Mapping):
             self.error_dict = self._error
         elif is_non_string_iterable(self._error):
             self.error_list = self._error
@@ -80,15 +81,15 @@ def __str__(self):
     def detail(self):
         if isinstance(self._error, six.string_types):
             return [self._error]
-        elif isinstance(self._error, collections.Mapping):
+        elif isinstance(self._error, Mapping):
             return self._error
         return self._error
 
     @property
     def messages(self):
         if isinstance(self._error, six.string_types):
             return [self._error]
-        elif isinstance(self._error, collections.Mapping):
+        elif isinstance(self._error, Mapping):
             return [self._error]
         return self._error
 

flex/paths.py

@@ -3,6 +3,7 @@
 import functools
 import re
 
+from flex._compat import Mapping
 from flex.exceptions import MultiplePathsFound
 from flex.error_messages import MESSAGES
 from flex.constants import (
@@ -146,7 +147,7 @@ def match_path_to_api_path(path_definitions, target_path, base_path='',
     """
     if context is None:
         context = {}
-    assert isinstance(context, collections.Mapping)
+    assert isinstance(context, Mapping)
     if target_path.startswith(base_path):
         # Convert all of the api paths into Path instances for easier regex
         # matching.

flex/utils.py

@@ -1,12 +1,12 @@
 import math
-import collections
 import numbers
 
 from six.moves import urllib_parse as urlparse
 import six
 
 import jsonpointer
 
+from flex._compat import Mapping, Sequence
 from flex.constants import (
     PRIMITIVE_TYPES,
     NULL,
@@ -43,7 +43,7 @@ def is_non_string_iterable(value):
 
 
 def pluralize(value):
-    if is_non_string_iterable(value) and not isinstance(value, collections.Mapping):
+    if is_non_string_iterable(value) and not isinstance(value, Mapping):
         return value
     return [value]
 
@@ -127,7 +127,7 @@ def get_type_for_value(value):
 
 def is_single_item_iterable(value):
     if is_non_string_iterable(value):
-        if isinstance(value, collections.Sequence):
+        if isinstance(value, Sequence):
             if len(value) == 1:
                 return True
     return False
@@ -161,7 +161,7 @@ def format_errors(errors, indent=0, prefix='', suffix=''):
     if isinstance(errors, SINGULAR_TYPES):
         yield indent_message(repr(errors), indent, prefix=prefix, suffix=suffix)
 
-    elif isinstance(errors, collections.Mapping):
+    elif isinstance(errors, Mapping):
         for key, value in errors.items():
             assert isinstance(key, SINGULAR_TYPES), type(key)
             if isinstance(value, SINGULAR_TYPES):

flex/validation/common.py

@@ -11,6 +11,7 @@
 import six
 
 
+from flex._compat import Mapping, Sequence
 from flex.exceptions import (
     ValidationError,
     ErrorDict,
@@ -458,11 +459,11 @@ def generate_value_processor(type_, collectionFormat=None, items=None, **kwargs)
             # strip off any whitespace
             processors.append(functools.partial(map, operator.methodcaller('strip')))
             if items is not None:
-                if isinstance(items, collections.Mapping):
+                if isinstance(items, Mapping):
                     items_processors = itertools.repeat(
                         generate_value_processor(**items)
                     )
-                elif isinstance(items, collections.Sequence):
+                elif isinstance(items, Sequence):
                     items_processors = itertools.chain(
                         (generate_value_processor(**item) for item in items),
                         itertools.repeat(lambda v: v),

flex/validation/schema.py

@@ -1,9 +1,9 @@
 import itertools
-import collections
 import functools
 
 import six
 
+from flex._compat import Mapping, Sequence
 from flex.exceptions import (
     ValidationError,
     ErrorList,
@@ -93,7 +93,7 @@ def generate_max_properties_validator(maxProperties, **kwargs):
 
 
 def construct_items_validators(items, context):
-    if isinstance(items, collections.Mapping):
+    if isinstance(items, Mapping):
         items_validators = construct_schema_validators(
             schema=items,
             context=context,
@@ -126,15 +126,15 @@ def validate_items(objs, field_validators, **kwargs):
 
 
 def generate_items_validator(items, context, **kwargs):
-    if isinstance(items, collections.Mapping):
+    if isinstance(items, Mapping):
         # If items is a reference or a schema, we pass it through as an
         # ever repeating list of the same validation dictionary, thus
         # validating all of the objects against the same schema.
         items_validators = itertools.repeat(construct_items_validators(
             items,
             context,
         ))
-    elif isinstance(items, collections.Sequence):
+    elif isinstance(items, Sequence):
         # We generate a list of validator dictionaries and then chain it
         # with an empty schema that repeats forever.  This ensures that if
         # the array of objects to be validated is longer than the array of

tests/core/test_load_source.py

@@ -1,13 +1,13 @@
 from __future__ import unicode_literals
 
 import tempfile
-import collections
 
 import six
 
 import json
 import yaml
 
+from flex._compat import Mapping
 from flex.core import load_source
 
 
@@ -105,7 +105,7 @@ def test_url(httpbin):
     }
     source = httpbin.url + '/get'
     result = load_source(source)
-    assert isinstance(result, collections.Mapping)
+    assert isinstance(result, Mapping)
     result.pop('headers')
     result.pop('url')
     assert result == native

tests/utils.py

@@ -1,7 +1,8 @@
 import functools
-import collections
 import re
 import six
+
+from flex._compat import Mapping
 from flex.validation.common import validate_object
 from flex.loading.schema.paths.path_item.operation.responses.single.schema import (
     schema_validator,
@@ -57,7 +58,7 @@ def _find_message_in_errors(message, errors, namespace=''):
     if isinstance(errors, six.string_types):
         if check_if_error_message_equal(errors, message):
             yield namespace
-    elif isinstance(errors, collections.Mapping):
+    elif isinstance(errors, Mapping):
         for key, error in errors.items():
             for match in _find_message_in_errors(
                 message,
@@ -124,7 +125,7 @@ def assert_message_not_in_errors(message, errors):
 def _enumerate_error_paths(errors, namespace=''):
     if isinstance(errors, six.string_types):
         yield namespace
-    elif isinstance(errors, collections.Mapping):
+    elif isinstance(errors, Mapping):
         for key, error in errors.items():
             for match in _enumerate_error_paths(
                 error,