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1. String can be assigned.

str='xxxx'str1="xxxx" If a special character needs to be escaped with a backslash, Example: str="xxx\nccc" print(str) //output is two lines, the first line is Ru, the second line is oob If you don't want to escape, you can prefix the string with an r, Example: str=r"xxx\nccc" print(str) //output is xxx\nccc

2. Slice the string to facilitate the interception of some of the characters.

Syntax format: String variable name [head subscript: tail subscript] Get results with head and no tail.// The subscripts start at 0 and increase in sequence, but can also be negative, meaning going backwards.

Example: a="abcdefg" print(a[0:3]) //output abc print(a[0:-3]) //output abcd

3. Use the plus sign to splice between strings, and output multiple times through multiplication.

Example: a="abcdefg" print(a+"123") //output is abcdefg123 print(a*2) //output is abcdefgabcdefg

Python strings are immutable, so you cannot assign a value to a subscript.

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