Python 2.6 + str.format () и регулярные выражения

Question

Python 2.6 + str.format () и регулярные выражения

Представьте несколько команд в виде строки вместе с помощью & & команда:

./run.sh && tail -f log.txt

или

kill -9 1111 && ./start.sh

18

python regex format string-formatting

задан agf 29 September 2011 в 14:17

2 ответа

Per the documentation, if you need a literal { or } to survive the formatting opertation, use {{ and }} in the original string.

'^(w{{3}}\.)?([0-9A-Za-z-]+\.){{1}}{domainName}$'.format(domainName = 'delivery.com')

11

ответ дан 30 November 2019 в 07:12

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score 28 · Accepted Answer

you first would need to format string and then use regex. It really doesn't worth it to put everything into a single line. Escaping is done by doubling the curly braces:

>>> pat= '^(w{{3}}\.)?([0-9A-Za-z-]+\.){{1}}{domainName}$'.format(domainName = 'delivery.com')
>>> pat
'^(w{3}\\.)?([0-9A-Za-z-]+\\.){1}delivery.com$'
>>> re.match(pat, str1)

Also, re.match is matching at the beginning of the string, you don't have to put ^ if you use re.match, you need ^ if you're using re.search, however.

Please note, that {1} in regex is rather redundant.