您如何有条件地检查转义字符？

Question

I have a string which contains the escape character \\x . However if i try to check for it with:

if char == "\x":

I receive the error

ValueError: invalid \x escape

Answer 1

I have a string which contains the escape character \\x

No you don't. There is no such things as "the escape character \\x ". \\x is two characters, not one. The first character is the backslash, the second character is lower-case x.

You have to escape the backslash in order to defeat its meaning.

if two_character_string == "\\x":

or perhaps

if first_char == "\\" and second_char == "x":