Fixed python3 issues

Author: syrusakbary

graphql/execution/experimental/resolver.py

@@ -1,5 +1,12 @@
 import collections
-import itertools
+try:
+    from itertools import imap
+    normal_map = map
+except:
+    def normal_map(func, iter):
+        return list(map(func, iter))
+    imap = map
+
 from functools import partial
 
 from promise import Promise
@@ -33,9 +40,9 @@ def complete_list_value(inner_resolver, exe_context, info, on_error, result):
         ('User Error: expected iterable, but did not find one ' +
          'for field {}.{}.').format(info.parent_type, info.field_name)
 
-    completed_results = map(inner_resolver, result)
+    completed_results = normal_map(inner_resolver, result)
 
-    if not any(itertools.imap(is_promise, completed_results)):
+    if not any(imap(is_promise, completed_results)):
         return completed_results
 
     return Promise.all(completed_results).catch(on_error)

graphql/execution/experimental/tests/test_fragment.py

@@ -122,7 +122,7 @@ def test_fragment_resolver_abstract():
             id
         }
     }''')
-    print document_ast
+
     root_value = None
     context_value = None
     operation_name = None

graphql/execution/experimental/tests/test_nonnull.py

@@ -86,7 +86,7 @@ def check(doc, data, expected):
     response = execute(schema, ast, data)
 
     if response.errors:
-        print response.errors
+
         result = {
             'data': response.data,
             'errors': [format_error(e) for e in response.errors]

graphql/execution/experimental/tests/test_union_interface.py

@@ -146,7 +146,7 @@ def test_executes_using_union_types():
         }
     ''')
     result = execute(schema, ast, john)
-    # print type(result.errors[0].original_error)
+
     assert not result.errors
     assert result.data == {
         '__typename': 'Person',