在python中将CSV解析为模板

Question

I want to write simple python script which will first load .csv file and then output it to another file using provided template:

FirstVariable Cleartext-Password := "SecondVariable", Service-Type := Framed-User
    Framed-IP-Address := ThirdVariable,
    MS-Primary-DNS-Server := 8.8.8.8,
    Fall-Through = Yes,
    Mikrotik-Rate-Limit = 4thVariableM/5thVariableM

example:

input file:

john;lovelycat;192.168.1.1;40;30

output:

john Cleartext-Password := "lovelycat", Service-Type := Framed-User
    Framed-IP-Address := 192.168.1.1,
    MS-Primary-DNS-Server := 8.8.8.8,
    Fall-Through = Yes,
    Mikrotik-Rate-Limit = 40M/30M

Other parameters above should stay as they are, i only need to paste the mentioned values.

At this moment i know only how to read and write files, but i have no clue how to tell python to output text to file and how to use variables in the text so i can save the parameters from .csv to variables and then output it.

Could you please help me with tips how can i accomplish it?

Answer 1

Using csv module with f-string

Ex:

import csv


with open(filename) as infile:
    reader = csv.reader(infile, delimiter=";")
    for row in reader:
        template_data = f"""{row[0]} Cleartext-Password := "{row[1]}", Service-Type := Framed-User
                    Framed-IP-Address := {row[2]},
                    MS-Primary-DNS-Server := 8.8.8.8,
                    Fall-Through = Yes,
                    Mikrotik-Rate-Limit = {row[3]}M/{row[4]}M"""
        print(template_data)

Output:

john Cleartext-Password := "lovelycat", Service-Type := Framed-User
                    Framed-IP-Address := 192.168.1.1,
                    MS-Primary-DNS-Server := 8.8.8.8,
                    Fall-Through = Yes,
                    Mikrotik-Rate-Limit = 40M/30M