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pythonstringlowercase

Detect index of lower case letters

How do I get the index of all lower case letters of a string?

For example, the string "AbCd" would lead to [1,3].

Solution

  • A simple iteration over the string would do it:

    s = "AbCd"
result = []
for i, a in enumerate(s):
    if a.islower():
        result.append(i)

    Another way would be a list comprehension:

    s = "AbCd"
result = [i for i, a in enumerate(s) if a.islower()]

    Both cases result in the same:

    result = [1,3]