P_008.python string intercept substring __python

There is no method like sub () or substring () in Python, but the interception of strings is simpler.

Just think of the string as a character array, and it's convenient to intercept the substring.

Needless words will not be long-winded, look at the following example to understand.

str = ' 0123456789′
Print Str[0:3] #截取第一位到第三位的字符
Print str[:] #截取字符串的全部字符
Print Str[6:] #截取第七个字符到结尾
Print Str[:-3] #截取从头开始到倒数第三个字符之前
Print Str[2] #截取第三个字符
Print Str[-1] #截取倒数第一个字符
Print Str[::-1] #创造一个与原字符串顺序相反的字符串
Print Str[-3:-1] #截取倒数第三位与倒数第一位之前的字符
Print str[-3:] #截取倒数第三位到结尾
Print str[:-5:-3] #逆序截取, what do you mean?

The corresponding output results are:

012
0123456789
6789
0123456
2
9
9876543210
78
789
96