fix installation fail for python >=3.7 (due to dataclasses)

devdoomari · devdoomari3 · commit 08a43bed1830 · 2020-11-04T19:24:59.000+09:00
diff --git a/setup.py b/setup.py
@@ -23,7 +23,7 @@
     install_requires=[
         "mypy",
         "mypy_extensions",
-        "dataclasses",
+        "dataclasses; python_version < '3.7.0'",
         "typing_inspect>=0.6.0",
     ],
 )
