Replace boolean test with is None
diff --git a/Lib/formatter.py b/Lib/formatter.py
index 75f4718..ccbbdf1 100644
--- a/Lib/formatter.py
+++ b/Lib/formatter.py
@@ -38,7 +38,7 @@
"""
def __init__(self, writer=None):
- if not writer:
+ if writer is None:
writer = NullWriter()
self.writer = writer
def end_paragraph(self, blankline): pass
@@ -433,7 +433,7 @@
def test(file = None):
w = DumbWriter()
f = AbstractFormatter(w)
- if file:
+ if file is not None:
fp = open(file)
elif sys.argv[1:]:
fp = open(sys.argv[1])
diff --git a/Lib/ftplib.py b/Lib/ftplib.py
index 21b9e52..4a3d884 100644
--- a/Lib/ftplib.py
+++ b/Lib/ftplib.py
@@ -659,7 +659,7 @@
__defacct = None
def __init__(self, filename=None):
- if not filename:
+ if filename is None:
if os.environ.has_key("HOME"):
filename = os.path.join(os.environ["HOME"],
".netrc")
diff --git a/Lib/gettext.py b/Lib/gettext.py
index 0bea9ed..253b6d8 100644
--- a/Lib/gettext.py
+++ b/Lib/gettext.py
@@ -104,7 +104,7 @@
self._info = {}
self._charset = None
self._fallback = None
- if fp:
+ if fp is not None:
self._parse(fp)
def _parse(self, fp):
diff --git a/Lib/hmac.py b/Lib/hmac.py
index c9e4ae8..ba0a63c 100644
--- a/Lib/hmac.py
+++ b/Lib/hmac.py
@@ -46,7 +46,7 @@
key = key + chr(0) * (blocksize - len(key))
self.outer.update(_strxor(key, opad))
self.inner.update(_strxor(key, ipad))
- if (msg):
+ if msg is not None:
self.update(msg)
## def clear(self):