Python String corrupted with character \
I have a program that creates for its operation another program on the user's computer. In a snippet, I set the directory the new program will be destined to as
diret = "C:\\Users\\" + d_user
Where d_user is the rest of the directory. However, when created and executed, the string is converted to
'C:\Users\'
With one bar only, which raises
SyntaxError: EOL while scanning string literal
Because the string is not closed in the second ['].
How can I prevent this from happening in order for my code run fully?
EDIT:
The code within the main code, which will be created, is available at https://ideone.com/KTAQxf from lines 4 to 24; the rest are just Main Code context. The error happens with Line 10.
1 answers
The line
diret = "C:\\Users\\" + d_user
Is correct. What happens is that \ is an escape character; that is, when you need for example to use quotes without ending the string, you can do
s = "aspas: \" <- interpretado como aspas sem fechar a string"
Thus, he is interpreted in a special way and he himself also needs to be escaped with \. When you want to put a character \ in the string, you need to use \\ (the first "escapes" the second and the second is interpreted literally).
What do you write in a new file is escaped, but therefore results in writing only one \ at a time. When the second file is read, there is only one \ and it escapes the double end quotes of the string.
To solve your problem, there are two possible solutions. The first is to fold the bars in key_file.write:
...
diret = "C:\\\\Users\\\\" + d_user
...
And the second and perhaps most elegant is to use a raw string, or raw, prefixing it with r. Thus, \ is treated as a normal character.
key_file.write(r'''
import sys
[...]
input()''')