argparse: PEP8 formatting

argparse/argparse.py

@@ -5,9 +5,11 @@ Minimal and functional version of CPython's argparse module.
 import sys
 from _collections import namedtuple
 
+
 class _ArgError(BaseException):
     pass
 
+
 class _Arg:
     def __init__(self, names, dest, action, nargs, const, default, help):
         self.names = names
@@ -21,7 +23,7 @@ class _Arg:
     def parse(self, optname, args):
         # parse args for this arg
         if self.action == "store":
-            if self.nargs == None:
+            if self.nargs is None:
                 if args:
                     return args.pop(0)
                 else:
@@ -60,6 +62,7 @@ class _Arg:
         else:
             assert False
 
+
 def _dest_from_optnames(opt_names):
     dest = opt_names[0]
     for name in opt_names:
@@ -102,11 +105,12 @@ class ArgumentParser:
                 args = [dest]
         list.append(
             _Arg(args, dest, action, kwargs.get("nargs", None),
-                const, default, kwargs.get("help", "")))
+                 const, default, kwargs.get("help", "")))
 
     def usage(self, full):
         # print short usage
         print("usage: %s [-h]" % sys.argv[0], end="")
+
         def render_arg(arg):
             if arg.action == "store":
                 if arg.nargs is None:

argparse/test_argparse.py

@@ -11,24 +11,24 @@ parser = argparse.ArgumentParser()
 parser.add_argument("-a", action="store_true")
 parser.add_argument("-b", default=123)
 args = parser.parse_args([])
-assert args.a == False and args.b == 123
+assert args.a is False and args.b == 123
 args = parser.parse_args(["-a"])
-assert args.a == True and args.b == 123
+assert args.a is True and args.b == 123
 args = parser.parse_args(["-b", "456"])
-assert args.a == False and args.b == "456"
+assert args.a is False and args.b == "456"
 
 parser = argparse.ArgumentParser()
 parser.add_argument("-a", "--a-opt", action="store_true")
 parser.add_argument("-b", "--b-opt", default=123)
 parser.add_argument("--c-opt", default="test")
 args = parser.parse_args([])
-assert args.a_opt == False and args.b_opt == 123 and args.c_opt == "test"
+assert args.a_opt is False and args.b_opt == 123 and args.c_opt == "test"
 args = parser.parse_args(["--a-opt"])
-assert args.a_opt == True and args.b_opt == 123 and args.c_opt == "test"
+assert args.a_opt is True and args.b_opt == 123 and args.c_opt == "test"
 args = parser.parse_args(["--b-opt", "456"])
-assert args.a_opt == False and args.b_opt == "456" and args.c_opt == "test"
+assert args.a_opt is False and args.b_opt == "456" and args.c_opt == "test"
 args = parser.parse_args(["--c-opt", "override"])
-assert args.a_opt == False and args.b_opt == 123 and args.c_opt == "override"
+assert args.a_opt is False and args.b_opt == 123 and args.c_opt == "override"
 
 parser = argparse.ArgumentParser()
 parser.add_argument("files", nargs="+")