CODEWITHSUNDEEP
pythonmacrospython-2.7
Fla-Hyd
Fla-Hyd

Reputation: 279

Python macro in regular expression

In the below case i have used "|" condition in matching multiple search patterns and replacing all the search patterns with the value. It worked fine. But Does python has any MACRO type of thing where i can write all the patterns in it and call that in the search pattern? and replace all the patterns at once. Because i have to write almost 20 to 30 search patterns. Please help me in implementing this.

Thanks in Advance.

import re

st = '''<h5>Reglar</h5>
<h5>Lateral</h5>
<h5>Daily</h5>
<h5>Weekly</h5>
<h5>Monthly</h5>
<h5>Quaterly</h5>
<h5>Yearly</h5>
<h5>Halfyearly</h5>'''

vr = re.sub(r'(?i)<h5>(Lateral|Halfyearly|Monthly)</h5>', "<h5>FINAL</h5>", st)
print vr

Upvotes: 0

Views: 599

Answers (1)

lgautier
lgautier

Reputation: 11545

Python does not have macros.

I am not certain to understand for sure what you are after but:

Strings containing the regular expression can be build programmatically:

frequncy_str = ('Lateral', 'Daily', 'Weekly', 'Monthly')
re_str = '(?i)<h5>(' + '|'.join(frequency_str) + ')</h5>'

For better performances, if the match is going to be performed several times one should compile the regular expression:

  re_pat = re.compile(re_str)

Upvotes: 2

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