Python-сообщество

import re
import datetime
 
 
_td_names = [
    'days',
    'hours',
    'minutes',
    'seconds',
]
td_regexps = {name : re.compile(r"(\d+)%s" % name[0]) for name in _td_names}
 
def parse_timedelta(text):
    fields = {}
    for name, pattern in td_regexps.items():
        m = pattern.search(text)
        if m:
            fields[name] = float(m.group(1))
    if not fields:
        return None  # or raise exception
    return datetime.timedelta(**fields)
 
test_strings = [
    "3d 5h 15m",
    "23d 5m",
    "6h",
    "25h 150m",
    "aasdf",
]
for text in test_strings:
    print parse_timedelta(text)

import re
import datetime
 
 
_td_names = {
    'd': 'days',
    'h': 'hours',
    'm': 'minutes',
    's': 'seconds'
}
td_regexp = re.compile(r"\b(\d+)(%s)\b" % '|'.join(_td_names.keys()))
 
def parse_timedelta(text):
    fields = {}
    for value, name in td_regexp.findall(text):
        fields[_td_names[name]] = float(value)
    if not fields:
        return None
    return datetime.timedelta(**fields)
 
test_strings = [
    "3d 5h 15m",
    "23d 5m",
    "6h",
    "25h 150m",
    "aasdf",
]
for text in test_strings:
    print parse_timedelta(text)

>>> import re
>>> 
>>> s = """
... 23d 5m
... 6h
... 25h 150m
... 3d 5h 15m
... 23d 5m
... 6h
... 25h 150m
... aasdf
... """
>>> 
>>> pat = re.compile(r'((?P<day>\d+)d)?((?P<hour>\d+)h)?((?P<min>\d+)m)?')
>>> 
>>> for line in s.splitlines():
...     mo = pat.match(line.replace(' ', ''))
...     if mo is not None and mo.group(0):
...         print(mo.group('day', 'hour', 'min'))
... 
('23', None, '5')
(None, '6', None)
(None, '25', '150')
('3', '5', '15')
('23', None, '5')
(None, '6', None)
(None, '25', '150')
>>>

pat = re.compile(r'((?P<days>\d+)d)?((?P<hours>\d+)h)?((?P<minutes>\d+)m)?')
for line in s.splitlines():
    mo = pat.match(line.replace(' ', ''))
    if mo is not None and mo.group(0):
        fields = {name: int(value)
                  for name, value in mo.groupdict().items()
                  if value is not None}
        print(datetime.timedelta(**fields))