Find the leftmost digit that occurs in a given string.

Example

    • For inputString = "var_1__Int", the output should be
      firstDigit(inputString) = '1';
    • For inputString = "q2q-q", the output should be
      firstDigit(inputString) = '2';
    • For inputString = "0ss", the output should be
      firstDigit(inputString) = '0'.

我的解答：

def firstDigit(inputString):

    return [i for i in inputString if i.isdigit()][0]
def firstDigit(inputString):

    for i in inputString:

        if i.isdigit():

            return i

膜拜大佬

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