In Python, strings are immutable, so you have to create a new string. You have a few options of how to create the new string. ... <看更多>

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Python starts counting at 0 . Here's what a quick test looks like: >>> x = '18885556607' >>> y = '8665558411' >>> x[0] '1' >>> x[1:] '8885556607' >>>. ... <看更多>