How to remove leading and trailing zeros in a string Python

Question

I have several alphanumeric strings like these  listOfNum     000231512-n   1209123100000-n00000   alphanumeric0000    000alphanumeric     The desired output for removing trailing zeros would be   listOfNum     000231512-n   1209123100000-n   alphanumeric    000alphanumeric     The desired output for leading trailing zeros would be   listOfNum     231512-n   1209123100000-n00000   alphanumeric0000    alphanumeric     The desire output for removing both leading and trailing zeros would be   listOfNum     231512-n   1209123100000-n    alphanumeric    alphanumeric     For now i ve been doing it the following way  please suggest a better way if there is   listOfNum     000231512-n   1209123100000-n00000   alphanumeric0000      000alphanumeric   trailingremoved      leadingremoved      bothremoved         Remove trailing for i in listOfNum    while i -1      0       i   i  -1    trailingremoved append i     Remove leading for i in listOfNum    while i 0      0       i   i 1     leadingremoved append i     Remove both for i in listOfNum    while i 0      0       i   i 1     while i -1      0       i   i  -1    bothremoved append i

User · Answer

Did you try with strip      listOfNum     231512-n   1209123100000-n00000   alphanumeric0000    alphanumeric   print  item strip  0   for item in listOfNum    gt  gt  gt    231512-n    1209123100000-n    alphanumeric    alphanumeric

User · Answer

Remove leading   trailing  0    list    i strip  0   for i in listOfNum     Remove leading  0    list     i lstrip  0   for i in listOfNum     Remove trailing  0    list     i rstrip  0   for i in listOfNum

User · Answer

Assuming you have other data types  and not only string  in your list try this  This removes trailing and leading zeros from strings and leaves other data types untouched  This also handles the special case s    0   e g   a     001    200    akdl00   200  100   0    b     lambda x  x strip  0   if isinstance x str  and len x     1 else x  x  for x in a   b  gt  gt  gt   1    2    akdl   200  100   0

User · Answer

You can simply do this with a bool   if int number     float number       number   int number   else      number   float number

User · Answer

str strip is the best approach for this situation  but more itertools strip is also a general solution that strips both leading and trailing elements from an iterable   Code  import more itertools as mit   iterables     231512-n n     12091231000-n00000   alphanum0000    00alphanum   pred   lambda x  x in   0     n        list    join mit strip i  pred   for i in iterables      231512-n    12091231000-n    alphanum    alphanum       Details  Notice  here we strip both leading and trailing  0 s among other elements that satisfy a predicate   This tool is not limited to strings     See also docs for more examples of    more itertools strip  strip both ends more itertools lstrip  strip the left end more itertools rstrip  strip the right end   more itertools is a third-party library installable via  gt  pip install more itertools

User · Answer

What about a basic your string strip  quot 0 quot    to remove both trailing and leading zeros   If you re only interested in removing trailing zeros  use  rstrip instead  and  lstrip for only the leading ones   More info in the doc  You could use some list comprehension to get the sequences you want like so  trailing removed    s rstrip  quot 0 quot   for s in listOfNum  leading removed    s lstrip  quot 0 quot   for s in listOfNum  both removed    s strip  quot 0 quot   for s in listOfNum

[python] How to remove leading and trailing zeros in a string? Python

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