可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试):
问题:
I have a .ics file in the following format. What is the best way to parse it? I need to retrieve the Summary, Description, and Time for each of the entries.
BEGIN:VCALENDAR X-LOTUS-CHARSET:UTF-8 VERSION:2.0 PRODID:-//Lotus Development Corporation//NONSGML Notes 8.0//EN METHOD:PUBLISH BEGIN:VTIMEZONE TZID:India BEGIN:STANDARD DTSTART:19500101T020000 TZOFFSETFROM:+0530 TZOFFSETTO:+0530 END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTART;TZID="India":20100615T111500 DTEND;TZID="India":20100615T121500 TRANSP:OPAQUE DTSTAMP:20100713T071035Z CLASS:PUBLIC DESCRIPTION:Emails\nDarlene\n Murphy\nDr. Ferri\n UID:12D3901F0AD9E83E65257743001F2C9A-Lotus_Notes_Generated X-LOTUS-UPDATE-SEQ:1 X-LOTUS-UPDATE-WISL:$S:1;$L:1;$B:1;$R:1;$E:1;$W:1;$O:1;$M:1 X-LOTUS-NOTESVERSION:2 X-LOTUS-APPTTYPE:0 X-LOTUS-CHILD_UID:12D3901F0AD9E83E65257743001F2C9A END:VEVENT BEGIN:VEVENT DTSTART;TZID="India":20100628T130000 DTEND;TZID="India":20100628T133000 TRANSP:OPAQUE DTSTAMP:20100628T055408Z CLASS:PUBLIC DESCRIPTION: SUMMARY:smart energy management LOCATION:8778/92050462 UID:07F96A3F1C9547366525775000203D96-Lotus_Notes_Generated X-LOTUS-UPDATE-SEQ:1 X-LOTUS-UPDATE-WISL:$S:1;$L:1;$B:1;$R:1;$E:1;$W:1;$O:1;$M:1 X-LOTUS-NOTESVERSION:2 X-LOTUS-NOTICETYPE:A X-LOTUS-APPTTYPE:3 X-LOTUS-CHILD_UID:07F96A3F1C9547366525775000203D96 END:VEVENT BEGIN:VEVENT DTSTART;TZID="India":20100629T110000 DTEND;TZID="India":20100629T120000 TRANSP:OPAQUE DTSTAMP:20100713T071037Z CLASS:PUBLIC SUMMARY:meeting UID:6011DDDD659E49D765257751001D2B4B-Lotus_Notes_Generated X-LOTUS-UPDATE-SEQ:1 X-LOTUS-UPDATE-WISL:$S:1;$L:1;$B:1;$R:1;$E:1;$W:1;$O:1;$M:1 X-LOTUS-NOTESVERSION:2 X-LOTUS-APPTTYPE:0 X-LOTUS-CHILD_UID:6011DDDD659E49D765257751001D2B4B END:VEVENT
回答1:
The icalendar package looks nice.
For instance, to write a file:
from icalendar import Calendar, Event from datetime import datetime from pytz import UTC # timezone cal = Calendar() cal.add('prodid', '-//My calendar product//mxm.dk//') cal.add('version', '2.0') event = Event() event.add('summary', 'Python meeting about calendaring') event.add('dtstart', datetime(2005,4,4,8,0,0,tzinfo=UTC)) event.add('dtend', datetime(2005,4,4,10,0,0,tzinfo=UTC)) event.add('dtstamp', datetime(2005,4,4,0,10,0,tzinfo=UTC)) event['uid'] = '20050115T101010/27346262376@mxm.dk' event.add('priority', 5) cal.add_component(event) f = open('example.ics', 'wb') f.write(cal.to_ical()) f.close()
Tadaaa, you get this file:
BEGIN:VCALENDAR PRODID:-//My calendar product//mxm.dk// VERSION:2.0 BEGIN:VEVENT DTEND;VALUE=DATE:20050404T100000Z DTSTAMP;VALUE=DATE:20050404T001000Z DTSTART;VALUE=DATE:20050404T080000Z PRIORITY:5 SUMMARY:Python meeting about calendaring UID:20050115T101010/27346262376@mxm.dk END:VEVENT END:VCALENDAR
But what lies in this file?
g = open('example.ics','rb') gcal = Calendar.from_ical(g.read()) for component in gcal.walk(): print component.name g.close()
You can see it easily:
>>> VCALENDAR VEVENT >>>
What about parsing the data about the events:
g = open('example.ics','rb') gcal = Calendar.from_ical(g.read()) for component in gcal.walk(): if component.name == "VEVENT": print(component.get('summary')) print(component.get('dtstart')) print(component.get('dtend')) print(component.get('dtstamp')) g.close()
Now you get:
>>> Python meeting about calendaring 20050404T080000Z 20050404T100000Z 20050404T001000Z >>>
回答2:
You could probably also use the vobject module for this: http://pypi.python.org/pypi/vobject
If you have a sample.ics file you can read it's contents like, so:
# read the data from the file data = open("sample.ics").read() # parse the top-level event with vobject cal = vobject.readOne(data) # Get Summary print 'Summary: ', cal.vevent.summary.valueRepr() # Get Description print 'Description: ', cal.vevent.description.valueRepr() # Get Time print 'Time (as a datetime object): ', cal.vevent.dtstart.value print 'Time (as a string): ', cal.vevent.dtstart.valueRepr()
回答3:
You can also use this new Python Package: http://packages.python.org/pyICSParser/
It parses the file and converts into a Python Array for easy processing.
回答4:
Four years later and understanding ICS format a bit better, if those were the only fields I needed, I'd just use the native string methods:
import io # Probably not a valid .ics file, but we don't really care for the example # it works fine regardless file = io.StringIO(''' BEGIN:VCALENDAR X-LOTUS-CHARSET:UTF-8 VERSION:2.0 DESCRIPTION:Emails\nDarlene\n Murphy\nDr. Ferri\n SUMMARY:smart energy management LOCATION:8778/92050462 DTSTART;TZID="India":20100629T110000 DTEND;TZID="India":20100629T120000 TRANSP:OPAQUE DTSTAMP:20100713T071037Z CLASS:PUBLIC SUMMARY:meeting UID:6011DDDD659E49D765257751001D2B4B-Lotus_Notes_Generated X-LOTUS-UPDATE-SEQ:1 X-LOTUS-UPDATE-WISL:$S:1;$L:1;$B:1;$R:1;$E:1;$W:1;$O:1;$M:1 X-LOTUS-NOTESVERSION:2 X-LOTUS-APPTTYPE:0 X-LOTUS-CHILD_UID:6011DDDD659E49D765257751001D2B4B END:VEVENT '''.strip()) parsing = False for line in file: field, _, data = line.partition(':') if field in ('SUMMARY', 'DESCRIPTION', 'DTSTAMP'): parsing = True print(field) print('\t'+'\n\t'.join(data.split('\n'))) elif parsing and not data: print('\t'+'\n\t'.join(field.split('\n'))) else: parsing = False
Storing the data and parsing the datetime is left as an exercise for the reader (it's always UTC)
old answer below
You could use a regex:
import re text = #your text print(re.search("SUMMARY:.*?:", text, re.DOTALL).group()) print(re.search("DESCRIPTION:.*?:", text, re.DOTALL).group()) print(re.search("DTSTAMP:.*:?", text, re.DOTALL).group())
I'm sure it may be possible to skip the first and last words, I'm just not sure how to do it with regex. You could do it this way though:
print(' '.join(re.search("SUMMARY:.*?:", text, re.DOTALL).group().replace(':', ' ').split()[1:-1])
回答5:
I'd parse line by line and do a search for your terms, then get the index and extract that and X number of characters further (however many you think you'll need). Then parse that much smaller string to get it to be what you need.
