Replace boolean test with is None.
diff --git a/Lib/sgmllib.py b/Lib/sgmllib.py
index bdca8a6..021c8b5 100644
--- a/Lib/sgmllib.py
+++ b/Lib/sgmllib.py
@@ -479,7 +479,7 @@
def test(args = None):
import sys
- if not args:
+ if args is None:
args = sys.argv[1:]
if args and args[0] == '-s':
diff --git a/Lib/shlex.py b/Lib/shlex.py
index e50b9ad..7ffa79c 100644
--- a/Lib/shlex.py
+++ b/Lib/shlex.py
@@ -12,7 +12,7 @@
class shlex:
"A lexical analyzer class for simple shell-like syntaxes."
def __init__(self, instream=None, infile=None):
- if instream:
+ if instream is not None:
self.instream = instream
self.infile = infile
else:
@@ -47,7 +47,7 @@
self.instream = newstream
self.lineno = 1
if self.debug:
- if newfile:
+ if newfile is not None:
print 'shlex: pushing to file %s' % (self.infile,)
else:
print 'shlex: pushing to stream %s' % (self.instream,)
@@ -188,9 +188,9 @@
def error_leader(self, infile=None, lineno=None):
"Emit a C-compiler-like, Emacs-friendly error-message leader."
- if not infile:
+ if infile is None:
infile = self.infile
- if not lineno:
+ if lineno is None:
lineno = self.lineno
return "\"%s\", line %d: " % (infile, lineno)
diff --git a/Lib/shutil.py b/Lib/shutil.py
index 6e3a276..4340127 100644
--- a/Lib/shutil.py
+++ b/Lib/shutil.py
@@ -122,7 +122,7 @@
exc = sys.exc_info()
if ignore_errors:
pass
- elif onerror:
+ elif onerror is not None:
onerror(cmd[0], cmd[1], exc)
else:
raise exc[0], (exc[1][0], exc[1][1] + ' removing '+cmd[1])
diff --git a/Lib/smtplib.py b/Lib/smtplib.py
index 62b19bd..4311d1a 100755
--- a/Lib/smtplib.py
+++ b/Lib/smtplib.py
@@ -236,7 +236,7 @@
(code, msg) = self.connect(host, port)
if code != 220:
raise SMTPConnectError(code, msg)
- if local_hostname:
+ if local_hostname is not None:
self.local_hostname = local_hostname
else:
# RFC 2821 says we should use the fqdn in the EHLO/HELO verb, and
diff --git a/Lib/sre_compile.py b/Lib/sre_compile.py
index e48be72..1c54f67 100644
--- a/Lib/sre_compile.py
+++ b/Lib/sre_compile.py
@@ -145,7 +145,7 @@
def _compile_charset(charset, flags, code, fixup=None):
# compile charset subprogram
emit = code.append
- if not fixup:
+ if fixup is None:
fixup = lambda x: x
for op, av in _optimize_charset(charset, fixup):
emit(OPCODES[op])
diff --git a/Lib/sre_parse.py b/Lib/sre_parse.py
index a5a8831..1b52967 100644
--- a/Lib/sre_parse.py
+++ b/Lib/sre_parse.py
@@ -80,7 +80,7 @@
def opengroup(self, name=None):
gid = self.groups
self.groups = gid + 1
- if name:
+ if name is not None:
ogid = self.groupdict.get(name, None)
if ogid is not None:
raise error, ("redefinition of group name %s as group %d; "
@@ -97,7 +97,7 @@
# a subpattern, in intermediate form
def __init__(self, pattern, data=None):
self.pattern = pattern
- if not data:
+ if data is None:
data = []
self.data = data
self.width = None