How to remove all strings from a list of tuples python

Use a nested tuple comprehension and isinstance:

output = [tuple(j for j in i if not isinstance(j, str)) for i in ListTuples]

Output:

[(100,), (80,), (20,), (40,), (40,)]

Note that there are trailing commas in the tuples to distinguish them from e.g. (100) which is identical to 100.

Since extracting the first item of each tuple is sufficient, you can unpack and use a list comprehension. For a list of tuples:

res = [(value,) for value, _ in ListTuples]  # [(100,), (80,), (20,), (40,), (40,)]

If you need just a list of integers:

res = [value for value, _ in ListTuples]     # [100, 80, 20, 40, 40]

For a functional alternative to the latter, you can use operator.itemgetter:

from operator import itemgetter
res = list(map(itemgetter(0), ListTuples))   # [100, 80, 20, 40, 40]

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