Python Raw string

1 str1='let's go'2   "<input> ", line 13     str1='s Go'4               ^5 syntaxerror:invalid syntax

Because str1 inside has "'", so the compiler can not escape and error, the correct code is as follows

str1='let\ ' Go'str1' Let'sgo '

Use \ as escape character to escape symbols in a string

1 str2='C:\now'2str23'C:\now ' 4 Print (STR2) 5 C: 6 ow

Because the str2 inside is the escape character of the line break, the output is wrapped, and the original string escape characters R can be used.

Str2=r'C:\now'print(str2) C:\now

The backslash cannot be at the end of the string.

Str2=r'c:now\ '  <input>', line 1    str2=r'  c:now\ '                 ^

So the compiler will think \ as an escape character escapes ', you can write this

1 str2=r'C:\now'+'\ \'2 Print (STR2) 3 C:\now\

Python Raw string