CODEWITHSUNDEEP
pythonregex
nassimhddd
nassimhddd

Reputation: 8510

Efficient nested regular expressions

Is there an efficient and general way to match regular expressions as well as compositions based on them ?

For instance, if I want matches for each of those 3 strings: "I like", "cats", and "I like .* cats", I can obviously make 3 separate queries.

Is there a more efficient way to do this (preferably in python) ?

Upvotes: 1

Views: 50

Answers (1)

Hrabal
Hrabal

Reputation: 2525

patterns = ["I like", "cats", "I like .* cats"]

for stuff in patterns:
    re.search(r'%s' % stuff, string_to_search, flags)

More efficient, stops at the first match ordering patterns by lenght:

for stuff in sorted(patterns,key = len):
    if re.search(r'%s' % stuff, string_to_search):
        break

Upvotes: 1

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