Merge pull request #6741 from hroncok/python39

theano/compat/__init__.py

@@ -6,15 +6,16 @@ from __future__ import absolute_import, print_function, division
 from six import PY3, b, BytesIO, next
 from six.moves import configparser
 from six.moves import reload_module as reload
+from collections import OrderedDict
 try:
-    from collections.abc import (OrderedDict, MutableMapping as DictMixin,
-                                 Callable)
+    from collections.abc import (Callable, Iterable, Mapping, ValuesView,
+                                 MutableMapping as DictMixin)
 except ImportError:
     # this raises an DeprecationWarning on py37 and will become
-    # and Exception in py38. Importing from collections.abc
+    # and Exception in py39. Importing from collections.abc
     # won't work on py27
-    from collections import (OrderedDict, MutableMapping as DictMixin,
-                             Callable)
+    from collections import (Callable, Iterable, Mapping, ValuesView,
+                             MutableMapping as DictMixin)
 
 __all__ = ['PY3', 'b', 'BytesIO', 'next', 'configparser', 'reload']
 
@@ -73,8 +74,10 @@ else:
     def decode_with(x, encoding):
         return x
 
-__all__ += ['cmp', 'operator_div', 'DictMixin', 'OrderedDict', 'decode',
-            'decode_iter', 'get_unbound_function', 'imap', 'izip', 'ifilter']
+__all__ += ['cmp', 'operator_div',
+            'DictMixin', 'Iterable', 'Mapping', 'OrderedDict', 'ValuesView',
+            'decode', 'decode_iter', 'get_unbound_function',
+            'imap', 'izip', 'ifilter']
 
 
 class DefaultOrderedDict(OrderedDict):

theano/compile/nanguardmode.py

 from __future__ import absolute_import, print_function, division
-import collections
 import logging
 
 from six.moves import StringIO
@@ -9,6 +8,7 @@ import theano
 from theano import config
 import theano.tensor as T
 from theano.compile import Mode
+from theano.compat import ValuesView
 from .mode import get_mode
 
 try:
@@ -68,7 +68,7 @@ def flatten(l):
         A flattened list of objects.
 
     """
-    if isinstance(l, (list, tuple, collections.ValuesView)):
+    if isinstance(l, (list, tuple, ValuesView)):
         rval = []
         for elem in l:
             if isinstance(elem, (list, tuple)):

theano/misc/frozendict.py

@@ -5,10 +5,12 @@ import collections
 import operator
 import functools
 
+from theano.compat import Mapping
 
-class frozendict(collections.Mapping):
+
+class frozendict(Mapping):
     """
-    An immutable wrapper around dictionaries that implements the complete :py:class:`collections.Mapping`
+    An immutable wrapper around dictionaries that implements the complete :py:class:`collections.abc.Mapping`
     interface. It can be used as a drop-in replacement for dictionaries where immutability and ordering are desired.
     """
 

theano/scalar/basic.py

@@ -22,7 +22,7 @@ import six
 from six.moves import xrange
 
 import theano
-from theano.compat import imap, izip
+from theano.compat import imap, izip, Callable
 from theano import gof, printing
 from theano.gof import (Op, utils, Variable, Constant, Type, Apply,
                         FunctionGraph)
@@ -33,7 +33,6 @@ from theano.gradient import DisconnectedType
 from theano.gradient import grad_undefined
 
 from theano.printing import pprint
-import collections
 
 builtin_bool = bool
 builtin_complex = complex
@@ -1028,7 +1027,7 @@ class ScalarOp(Op):
     def __init__(self, output_types_preference=None, name=None):
         self.name = name
         if output_types_preference is not None:
-            if not isinstance(output_types_preference, collections.Callable):
+            if not isinstance(output_types_preference, Callable):
                 raise TypeError(
                     "Expected a callable for the 'output_types_preference' argument to %s. (got: %s)" %
                     (self.__class__, output_types_preference))

theano/tensor/nnet/abstract_conv.py

@@ -6,7 +6,10 @@ from __future__ import absolute_import, print_function, division
 import logging
 from six import reraise, integer_types
 import sys
-from fractions import gcd
+try:
+    from math import gcd
+except ImportError:
+    from fractions import gcd
 
 import theano
 

theano/tensor/subtensor.py

 from __future__ import absolute_import, print_function, division
 import sys
 from textwrap import dedent
-import collections
 import warnings
 import logging
 
@@ -22,6 +21,7 @@ from theano.tensor.basic import (addbroadcast, clip, get_scalar_constant_value,
 from theano.tensor.elemwise import DimShuffle
 from theano.tensor.type_other import NoneConst, SliceType, NoneTypeT, make_slice
 from theano import config
+from theano.compat import Iterable
 
 from .inc_code import inc_code
 
@@ -2154,7 +2154,7 @@ def check_and_reject_bool(args_el):
         pass
 
     if (not isinstance(args_el, theano.tensor.Variable) and
-            isinstance(args_el, collections.Iterable)):
+            isinstance(args_el, Iterable)):
         for el in args_el:
             check_and_reject_bool(el)