I have several alphanumeric strings like these
listOfNum = [\'000231512-n\',\'1209123100000-n00000\',\'alphanumeric0000\', \'000alphanumeric\']
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
>>>['1', '2', 'akdl', 200, 100, '0']
You can simply do this with a bool:
if int(number) == float(number):
number = int(number)
else:
number = float(number)
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 ]
Did you try with strip() :
listOfNum = ['231512-n','1209123100000-n00000','alphanumeric0000', 'alphanumeric']
print [item.strip('0') for item in listOfNum]
>>> ['231512-n', '1209123100000-n', 'alphanumeric', 'alphanumeric']
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 is a third-party library installable via > pip install more_itertools
.
What about a basic
your_string.strip("0")
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("0") for s in listOfNum]
leading_removed = [s.lstrip("0") for s in listOfNum]
both_removed = [s.strip("0") for s in listOfNum]