我已经看到在 Python 中编写相同的两种方式：
while 1:
# do something here
和
while True:
# do something here
哪个更pythonic？
问问题
2442 次
1 回答
3
没有实际区别。 1并且True在 python 中是相等的，这在未来也得到了保证，所以可以使用你最喜欢的外观。
至于哪个是pythonic，我认为完全避免这种循环是pythonic，除非在极少数情况下你确实打算有一个无限循环。
您几乎总是可以使用显式终止条件而不是 break 语句来编写它们，并且显式优于隐式。
两者在标准库中的使用频率大致相同。96 次出现while True：
/usr/lib/python2.7$ grep -rn "while True:"
_abcoll.py:292: while True:
_abcoll.py:478: while True:
_abcoll.py:531: while True:
argparse.py:1807: while True:
base64.py:287: while True:
base64.py:302: while True:
calendar.py:162: while True:
chunk.py:28:while True:
chunk.py:34: while True:
codecs.py:458: while True:
codecs.py:529: while True:
ConfigParser.py:478: while True:
decimal.py:2141: while True:
decimal.py:2331: while True:
decimal.py:2681: while True:
decimal.py:2990: while True:
decimal.py:3124: while True:
decimal.py:3205: while True:
decimal.py:5695: while True:
difflib.py:1466: while True:
difflib.py:1556: while True:
difflib.py:1573: while True:
difflib.py:1580: while True:
filecmp.py:67: while True:
fractions.py:245: while True:
gzip.py:202: while True:
gzip.py:208: while True:
gzip.py:248: while True:
gzip.py:502: while True:
httplib.py:273: while True:
httplib.py:406: while True:
httplib.py:411: while True:
httplib.py:572: while True:
httplib.py:610: while True:
httplib.py:747: while True:
locale.py:134: while True:
mailbox.py:217: while True:
mailbox.py:534: while True:
mailbox.py:652: while True:
mailbox.py:814: while True:
mailbox.py:850: while True:
mailbox.py:856: while True:
mailbox.py:1221: while True:
mailbox.py:1227: while True:
mailbox.py:1246: while True:
mailbox.py:1251: while True:
mailbox.py:1279: while True:
mailbox.py:1342: while True:
mailbox.py:1352: while True:
mailbox.py:1359: while True:
mailbox.py:1364: while True:
mailbox.py:1385: while True:
mailbox.py:1395: while True:
mimetypes.py:243: while True:
pdb.py:1312: while True:
pickletools.py:1841: while True:
posixpath.py:299: while True:
pty.py:146: while True:
pyclbr.py:196: while True:
pyclbr.py:284: while True:
pyclbr.py:308: while True:
py_compile.py:146: while True:
pydoc.py:537: while True:
pydoc.py:1762: while True:
_pyio.py:559: while True:
_pyio.py:953: while True:
_pyio.py:1013: while True:
_pyio.py:1896: while True:
sets.py:356: while True:
shlex.py:123: while True:
socket.py:349: while True:
socket.py:372: while True:
socket.py:427: while True:
socket.py:445: while True:
socket.py:474: while True:
socket.py:514: while True:
SocketServer.py:153: while True:
ssl.py:196: while True:
subprocess.py:476: while True:
sysconfig.py:406: while True:
tarfile.py:529: while True:
tarfile.py:534: while True:
tarfile.py:566: while True:
tarfile.py:836: while True:
tarfile.py:859: while True:
tarfile.py:902: while True:
tarfile.py:1168: while True:
tarfile.py:1384: while True:
tarfile.py:1579: while True:
tarfile.py:2317: while True:
tarfile.py:2379: while True:
tarfile.py:2508: while True:
threading.py:255: while True:
uu.py:105: while True:
_weakrefset.py:97: while True:
zipfile.py:579: while True:
和 116 次出现while 1。请注意，较旧的代码更有可能具有这种形式，因为bool在早期的 python 中并不总是存在。
/usr/lib/python2.7$ grep -rn "while 1:" *.py
aifc.py:309: while 1:
aifc.py:962: while 1:
audiodev.py:252: while 1:
binhex.py:257: while 1:
binhex.py:265: while 1:
binhex.py:295: while 1:
binhex.py:377: while 1:
binhex.py:481: while 1:
binhex.py:492: while 1:
cgi.py:251: while 1:
cgi.py:683: while 1:
cgi.py:696: while 1:
cgi.py:729: while 1:
code.py:227: while 1:
compileall.py:141: while 1:
DocXMLRPCServer.py:41: while 1:
fpformat.py:141: while 1:
ftplib.py:199: while 1:
ftplib.py:407: while 1:
ftplib.py:431: while 1:
ftplib.py:462: while 1:
ftplib.py:484: while 1:
ftplib.py:691: while 1:
ftplib.py:709: while 1:
ftplib.py:731: while 1:
ftplib.py:747: while 1:
ftplib.py:904: while 1:
getpass.py:97: while 1:
heapq.py:346: while 1:
heapq.py:348: while 1:
imaplib.py:864: while 1:
imaplib.py:987: while 1:
_LWPCookieJar.py:111: while 1:
mailbox.py:2021: while 1:
mailbox.py:2039: while 1:
mailbox.py:2050: while 1:
mailbox.py:2109: while 1:
mailbox.py:2117: while 1:
mailbox.py:2164: while 1:
mailbox.py:2172: while 1:
mailcap.py:63: while 1:
markupbase.py:269: while 1:
markupbase.py:323: while 1:
markupbase.py:345: while 1:
markupbase.py:358: while 1:
mhlib.py:305: while 1:
mhlib.py:616: while 1:
mhlib.py:915: while 1:
mhlib.py:920: while 1:
mimetools.py:240: while 1:
mimetools.py:247: while 1:
mimetypes.py:213: while 1:
mimify.py:86: while 1:
mimify.py:98: while 1:
mimify.py:111: while 1:
mimify.py:135: while 1:
mimify.py:164: while 1:
mimify.py:241: while 1:
mimify.py:266: while 1:
mimify.py:292: while 1:
mimify.py:315: while 1:
mimify.py:390: while 1:
mimify.py:407: while 1:
_MozillaCookieJar.py:58: while 1:
multifile.py:15:while 1:
multifile.py:114: while 1:
netrc.py:38: while 1:
netrc.py:58: while 1:
netrc.py:73: while 1:
nntplib.py:239: while 1:
nntplib.py:559: while 1:
nntplib.py:583: while 1:
os.py:545: while 1:
pdb.py:40: while 1:
pickle.py:856: while 1:
platform.py:166: while 1:
platform.py:966: while 1:
quopri.py:70: while 1:
quopri.py:128: while 1:
random.py:394: while 1:
random.py:464: while 1:
random.py:517: while 1:
random.py:540: while 1:
re.py:310: while 1:
rfc822.py:148: while 1:
shlex.py:287: while 1:
shutil.py:48: while 1:
site.py:424: while 1:
smtplib.py:352: while 1:
smtplib.py:847: while 1:
sre_parse.py:307: while 1:
sre_parse.py:325: while 1:
sre_parse.py:393: while 1:
sre_parse.py:406: while 1:
sre_parse.py:425: while 1:
sre_parse.py:536: while 1:
sre_parse.py:549: while 1:
sre_parse.py:573: while 1:
sre_parse.py:600: while 1:
sre_parse.py:640: while 1:
sre_parse.py:708: while 1:
sre_parse.py:718: while 1:
telnetlib.py:587: while 1:
telnetlib.py:608: while 1:
telnetlib.py:616: while 1:
telnetlib.py:732: while 1:
tokenize.py:286: while 1: # loop over lines in stream
urllib.py:266: while 1:
urlparse.py:282: while 1:
wave.py:135: while 1:
weakref.py:153: while 1:
weakref.py:359: while 1:
xdrlib.py:214: while 1:
xmllib.py:187: while 1:
xmlrpclib.py:1461: while 1:
zipfile.py:1095: while 1:
于 2013-03-14T06:51:51.110 回答