如何解析xsd：dateTime格式？
答
它实际上是一个非常有限制的格式，尤其是与所有ISO 8601相比。使用正则表达式大多与使用strptime加上自己处理偏移量（哪个strptime不做）相同。
import datetime
import re
def parse_timestamp(s):
"""Returns (datetime, tz offset in minutes) or (None, None)."""
m = re.match("""^
(?P<year>-?[0-9]{4}) - (?P<month>[0-9]{2}) - (?P<day>[0-9]{2})
T (?P<hour>[0-9]{2}) : (?P<minute>[0-9]{2}) : (?P<second>[0-9]{2})
(?P<microsecond>\.[0-9]{1,6})?
(?P<tz>
Z | (?P<tz_hr>[-+][0-9]{2}) : (?P<tz_min>[0-9]{2})
)?
$ """, s, re.X)
if m is not None:
values = m.groupdict()
if values["tz"] in ("Z", None):
tz = 0
else:
tz = int(values["tz_hr"]) * 60 + int(values["tz_min"])
if values["microsecond"] is None:
values["microsecond"] = 0
else:
values["microsecond"] = values["microsecond"][1:]
values["microsecond"] += "0" * (6 - len(values["microsecond"]))
values = dict((k, int(v)) for k, v in values.iteritems()
if not k.startswith("tz"))
try:
return datetime.datetime(**values), tz
except ValueError:
pass
return None, None
无法处理把时区偏移的日期时间，和消极年与日期时间的问题。这两个问题都可以通过处理xsd：dateTime所需全部范围的不同时间戳类型来解决。
valid = [
"2001-10-26T21:32:52",
"2001-10-26T21:32:52+02:00",
"2001-10-26T19:32:52Z",
"2001-10-26T19:32:52+00:00",
#"-2001-10-26T21:32:52",
"2001-10-26T21:32:52.12679",
]
for v in valid:
print
print v
r = parse_timestamp(v)
assert all(x is not None for x in r), v
# quick and dirty, and slightly wrong
# (doesn't distinguish +00:00 from Z among other issues)
# but gets through the above cases
tz = ":".join("%02d" % x for x in divmod(r[1], 60)) if r[1] else "Z"
if r[1] > 0: tz = "+" + tz
r = r[0].isoformat() + tz
print r
assert r.startswith(v[:len("CCYY-MM-DDThh:mm:ss")]), v
print "---"
invalid = [
"2001-10-26",
"2001-10-26T21:32",
"2001-10-26T25:32:52+02:00",
"01-10-26T21:32",
]
for v in invalid:
print v
r = parse_timestamp(v)
assert all(x is None for x in r), v
你问的是如何解析CCYY-MM-DDThh： mm：ss [Z |（+ | - ）hh：mm]'带有'datetime.datetime.strptime'？还是有更多不在引用的页面上？ –
@ S.Lott：稍微多一点或那个页面是因为它将微秒显示为有效输入（朝底部）。 – 2010-02-06 01:07:15