CODEWITHSUNDEEP
pythonstring
Paul
Paul

Reputation: 5974

searching string, exclude certain substrings

I am searching a string [email protected] for 108352, this should return true. However if I search for a substring of this it should not return true. Eg if I searched for 08352, this is missing the 1 so that would be false. How should I accomplish this?

I was searching like this:

for item in parse:          
            if element in item:

where element is 08352 and parse is several strings in a list. This is returning the positives I don't want.

perhaps I should look for a pattern? After each string I search for is a @ I notice, also before each one is a 0. So perhaps a regex? And somehow incorporate it into my for and if?

Edit: what if I prepend "00" to the search string and add @ at the end? Like:

if "00"+access_point_id+"@" in item:

Upvotes: 0

Views: 160

Answers (2)

Janne Karila
Janne Karila

Reputation: 25207

If you are looking for a string of 10 digits, you can add padding to the string you search for:

>>> '{:0>10}'.format('08352')
'0000008352'
>>> '-{:0>10}@'.format('08352')
'-0000008352@'

Upvotes: 1

Thomas Jung
Thomas Jung

Reputation: 33092

A simple infix search should suffice:

found = ("0%s@" % element) in item

a regular expression like -0+(\d+)@ is safer, though:

m = re.search(r"-0+(\d+)@", item)
found = m and m.group(1) == element

Upvotes: 1

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