Use aniso8601 instead of iso8601

Author: syrusakbary

graphene/types/datetime.py

@@ -3,17 +3,10 @@
 import datetime
 
 from graphql.language import ast
+from aniso8601 import parse_datetime, parse_date, parse_time
 
 from .scalars import Scalar
 
-try:
-    import iso8601
-except ImportError:
-    raise ImportError(
-        "iso8601 package is required for DateTime Scalar.\n"
-        "You can install it using: pip install iso8601."
-    )
-
 
 class Date(Scalar):
     '''
@@ -38,7 +31,7 @@ def parse_literal(cls, node):
 
     @staticmethod
     def parse_value(value):
-        return iso8601.parse_date(value).date()
+        return parse_date(value)
 
 
 class DateTime(Scalar):
@@ -62,7 +55,7 @@ def parse_literal(cls, node):
 
     @staticmethod
     def parse_value(value):
-        return iso8601.parse_date(value)
+        return parse_datetime(value)
 
 
 class Time(Scalar):
@@ -71,7 +64,6 @@ class Time(Scalar):
     specified by
     [iso8601](https://en.wikipedia.org/wiki/ISO_8601).
     '''
-    epoch_date = '1970-01-01'
 
     @staticmethod
     def serialize(time):
@@ -87,5 +79,4 @@ def parse_literal(cls, node):
 
     @classmethod
     def parse_value(cls, value):
-        dt = iso8601.parse_date('{}T{}'.format(cls.epoch_date, value))
-        return datetime.time(dt.hour, dt.minute, dt.second, dt.microsecond, dt.tzinfo)
+        return parse_time(value)

setup.py

@@ -90,6 +90,7 @@ def run_tests(self):
         'graphql-core>=2.0,<3',
         'graphql-relay>=0.4.5,<1',
         'promise>=2.1,<3',
+        'aniso8601>=3,<4',
     ],
     tests_require=tests_require,
     extras_require={