diff options
| -rw-r--r-- | Lib/telnetlib.py | 2 | ||||
| -rw-r--r-- | Lib/traceback.py | 10 | ||||
| -rw-r--r-- | Lib/urllib.py | 10 | ||||
| -rw-r--r-- | Lib/webbrowser.py | 2 | ||||
| -rw-r--r-- | Lib/xmlrpclib.py | 4 |
5 files changed, 14 insertions, 14 deletions
diff --git a/Lib/telnetlib.py b/Lib/telnetlib.py index 656e97b7bb..4c806db22e 100644 --- a/Lib/telnetlib.py +++ b/Lib/telnetlib.py @@ -186,7 +186,7 @@ class Telnet: self.cookedq = '' self.eof = 0 self.option_callback = None - if host: + if host is not None: self.open(host, port) def open(self, host, port=0): diff --git a/Lib/traceback.py b/Lib/traceback.py index 70b16067b9..c22f576798 100644 --- a/Lib/traceback.py +++ b/Lib/traceback.py @@ -16,7 +16,7 @@ def _print(file, str='', terminator='\n'): def print_list(extracted_list, file=None): """Print the list of tuples as returned by extract_tb() or extract_stack() as a formatted stack trace to the given file.""" - if not file: + if file is None: file = sys.stderr for filename, lineno, name, line in extracted_list: _print(file, @@ -51,7 +51,7 @@ def print_tb(tb, limit=None, file=None): 'file' should be an open file or file-like object with a write() method. """ - if not file: + if file is None: file = sys.stderr if limit is None: if hasattr(sys, 'tracebacklimit'): @@ -116,7 +116,7 @@ def print_exception(etype, value, tb, limit=None, file=None): occurred with a caret on the next line indicating the approximate position of the error. """ - if not file: + if file is None: file = sys.stderr if tb: _print(file, 'Traceback (most recent call last):') @@ -203,7 +203,7 @@ def print_exc(limit=None, file=None): """Shorthand for 'print_exception(sys.exc_type, sys.exc_value, sys.exc_traceback, limit, file)'. (In fact, it uses sys.exc_info() to retrieve the same information in a thread-safe way.)""" - if not file: + if file is None: file = sys.stderr try: etype, value, tb = sys.exc_info() @@ -214,7 +214,7 @@ def print_exc(limit=None, file=None): def print_last(limit=None, file=None): """This is a shorthand for 'print_exception(sys.last_type, sys.last_value, sys.last_traceback, limit, file)'.""" - if not file: + if file is None: file = sys.stderr print_exception(sys.last_type, sys.last_value, sys.last_traceback, limit, file) diff --git a/Lib/urllib.py b/Lib/urllib.py index b248b8afbd..07201258fb 100644 --- a/Lib/urllib.py +++ b/Lib/urllib.py @@ -203,7 +203,7 @@ class URLopener: if self.tempcache and url in self.tempcache: return self.tempcache[url] type, url1 = splittype(url) - if not filename and (not type or type == 'file'): + if filename is None and (not type or type == 'file'): try: fp = self.open_local_file(url1) hdrs = fp.info() @@ -662,7 +662,7 @@ _localhost = None def localhost(): """Return the IP address of the magic hostname 'localhost'.""" global _localhost - if not _localhost: + if _localhost is None: _localhost = socket.gethostbyname('localhost') return _localhost @@ -670,7 +670,7 @@ _thishost = None def thishost(): """Return the IP address of the current host.""" global _thishost - if not _thishost: + if _thishost is None: _thishost = socket.gethostbyname(socket.gethostname()) return _thishost @@ -678,7 +678,7 @@ _ftperrors = None def ftperrors(): """Return the set of errors raised by the FTP class.""" global _ftperrors - if not _ftperrors: + if _ftperrors is None: import ftplib _ftperrors = ftplib.all_errors return _ftperrors @@ -687,7 +687,7 @@ _noheaders = None def noheaders(): """Return an empty mimetools.Message object.""" global _noheaders - if not _noheaders: + if _noheaders is None: import mimetools import StringIO _noheaders = mimetools.Message(StringIO.StringIO(), 0) diff --git a/Lib/webbrowser.py b/Lib/webbrowser.py index 5254289301..b562ab3d19 100644 --- a/Lib/webbrowser.py +++ b/Lib/webbrowser.py @@ -17,7 +17,7 @@ def register(name, klass, instance=None): def get(using=None): """Return a browser launcher instance appropriate for the environment.""" - if using: + if using is not None: alternatives = [using] else: alternatives = _tryorder diff --git a/Lib/xmlrpclib.py b/Lib/xmlrpclib.py index d1edf20397..6460aa2b66 100644 --- a/Lib/xmlrpclib.py +++ b/Lib/xmlrpclib.py @@ -755,7 +755,7 @@ def dumps(params, methodname=None, methodresponse=None, encoding=None): elif methodresponse and isinstance(params, TupleType): assert len(params) == 1, "response tuple must be a singleton" - if not encoding: + if encoding is None: encoding = "utf-8" m = Marshaller(encoding) @@ -767,7 +767,7 @@ def dumps(params, methodname=None, methodresponse=None, encoding=None): xmlheader = "<?xml version='1.0'?>\n" # utf-8 is default # standard XML-RPC wrappings - if methodname: + if methodname is not None: # a method call if not isinstance(methodname, StringType): methodname = methodname.encode(encoding) |