Run flake8 in Travis and make code PEP8 compliant. (#387)

python/ray/test/test_functions.py

@@ -8,44 +8,53 @@ import numpy as np
 
 # Test simple functionality
 
+
 @ray.remote(num_return_vals=2)
 def handle_int(a, b):
   return a + 1, b + 1
 
 # Test timing
 
+
 @ray.remote
 def empty_function():
   pass
 
+
 @ray.remote
 def trivial_function():
   return 1
 
 # Test keyword arguments
 
+
 @ray.remote
 def keyword_fct1(a, b="hello"):
   return "{} {}".format(a, b)
 
+
 @ray.remote
 def keyword_fct2(a="hello", b="world"):
   return "{} {}".format(a, b)
 
+
 @ray.remote
 def keyword_fct3(a, b, c="hello", d="world"):
   return "{} {} {} {}".format(a, b, c, d)
 
 # Test variable numbers of arguments
 
+
 @ray.remote
 def varargs_fct1(*a):
   return " ".join(map(str, a))
 
+
 @ray.remote
 def varargs_fct2(a, *b):
   return " ".join(map(str, b))
 
+
 try:
   @ray.remote
   def kwargs_throw_exception(**c):
@@ -64,24 +73,29 @@ except:
 
 # test throwing an exception
 
+
 @ray.remote
 def throw_exception_fct1():
   raise Exception("Test function 1 intentionally failed.")
 
+
 @ray.remote
 def throw_exception_fct2():
   raise Exception("Test function 2 intentionally failed.")
 
+
 @ray.remote(num_return_vals=3)
 def throw_exception_fct3(x):
   raise Exception("Test function 3 intentionally failed.")
 
 # test Python mode
 
+
 @ray.remote
 def python_mode_f():
   return np.array([0, 0])
 
+
 @ray.remote
 def python_mode_g(x):
   x[0] = 1
@@ -89,14 +103,17 @@ def python_mode_g(x):
 
 # test no return values
 
+
 @ray.remote
 def no_op():
   pass
 
+
 class TestClass(object):
   def __init__(self):
     self.a = 5
 
+
 @ray.remote
 def test_unknown_type():
   return TestClass()