How to extract a specific line out of a text file

August 29, 2022

I have the code from the attached picture in a .can-file, which is in this case a text file. The task is to open the file and extract the content of the void function. In this case it would be "$LIN::Kl_15 = 1;"

This is what I already got:

Masterfunktionsliste = open("C:/.../Masterfunktionsliste_Beispiel.can", "r")
Funktionen = []
Funktionen = Masterfunktionsliste.read() 
Funktionen = Funktionen.split('\n')
print(Funktionen)

I receive the following list:

['', '', 'void KL15 ein', '{', '\t$LIN::Kl_15 = 1;', '}', '', 'void Motor ein', '{', '\t$LIN::Motor = 1;', '}', '', '']

And now i want to extract the $LIN::Kl_15 = 1; and the $LIN::Motor = 1; line into variables.

>Solution :

You can loop through the list, search for your variables and save it as dict:

can_file_content = ['', '', 'void KL15 ein', '{', '\t$LIN::Kl_15 = 1;', '}', '', 'void Motor ein', '{', '\t$LIN::Motor = 1;', '}', '', '']
extracted = {}

for line in can_file_content:
    if "$LIN" in line:  # extract the relevant line
        parsed_line = line.replace(";", "").replace("\t", "")  # remove ";" and "\t"
        variable, value = parsed_line.split("=")  # split on "="
        extracted[variable.strip()] = value.strip()  # remove whitespaces

output is {'$LIN::Kl_15': '1', '$LIN::Motor': '1'}
now you can access your new variables with extracted['$LIN::Motor'] which is 1