有没有办法在 Python 中子串一个字符串？

Question

Is there a way to substring a string in Python, to get a new string from the 3rd character to the end of the string?

Maybe like myString[2:end]?

If leaving the second part means 'till the end', if you leave the first part, does it start from the start?

转载于:https://stackoverflow.com/questions/663171/is-there-a-way-to-substring-a-string-in-python

Answer 1

>>> x = "Hello World!"
>>> x[2:]
'llo World!'
>>> x[:2]
'He'
>>> x[:-2]
'Hello Worl'
>>> x[-2:]
'd!'
>>> x[2:-2]
'llo Worl'

Python calls this concept "slicing" and it works on more than just strings. Take a look here for a comprehensive introduction.