fix bug of import parl (#72)

* add benchmark of GA3C

* fix bug of import parl without paddle

* fix codestyle

parl/utils/utils.py

@@ -16,7 +16,7 @@ import sys
 
 __all__ = [
     'has_func', 'action_mapping', 'to_str', 'to_byte', 'is_PY2', 'is_PY3',
-    'MAX_INT32'
+    'MAX_INT32', '_HAS_FLUID'
 ]
 
 

setup.py

@@ -44,9 +44,7 @@ setup(
     packages=_find_packages(),
     package_data={'': ['*.so']},
     install_requires=[
-        "termcolor>=1.1.0",
-        "pyzmq>=17.1.2",
-        "pyarrow>=0.12.0",
+        "termcolor>=1.1.0", "pyzmq>=17.1.2", "pyarrow>=0.12.0", "scipy>=1.0.0"
     ],
     classifiers=[
         'Intended Audience :: Developers',