python - Find strings from text same pattern as given words -


here words 

'x201i' 'b-442n-5' '00.55005.001' ...

i want write python script learn pattern given words. fixed length, same special character @ same position, same type(digit or letter) @ same position.

so can find out similar strings like

'b304d'  => 'letter|number|number|number|letter' 'e-472n-5' =>'letter|-|number|number|number|letter|-|number'

any suggestion or hints?

you need define 2 seperate patterns matching both type of formats. 

r'^(?:[a-za-z]\d{3}[a-za-z]|[a-za-z]-\d{3}[a-za-z]-\d)$'

example:

>>> import re >>> s = ['x201i', 'b-442n-5', '00.55005.001'] >>> [i in s if re.match(r'^(?:[a-za-z]\d{3}[a-za-z]|[a-za-z]-\d{3}[a-za-z]-\d)$', i)] ['x201i', 'b-442n-5']

[a-za-z] matches letter , \d matches digit.


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