Merge pull request #175 from AdrielVelazquez/master

Allow numbers in to_constant

Author: syrusakbary

graphene/utils/str_converters.py

@@ -18,4 +18,4 @@ def to_snake_case(name):
 
 
 def to_const(string):
-    return re.sub('[\W|^(?=\d)]+', '_', string).upper()
+    return re.sub('[\W|^]+', '_', string).upper()

graphene/utils/tests/test_str_converter.py

@@ -19,4 +19,4 @@ def test_camel_case():
 
 
 def test_to_const():
-    assert to_const('snakes $1. on a "#plane') == 'SNAKES_ON_A_PLANE'
+    assert to_const('snakes $1. on a "#plane') == 'SNAKES_1_ON_A_PLANE'