CODEWITHSUNDEEP
python-3.x
eekfonky
eekfonky

Reputation: 855

Iterate over text file and replace in a loop python 3

I am very new to Python and need help with a simple issue.

I have a text file "alias.txt" and need to iterate over the aliases in the file and create a new file (or stdout) where the text looks like this;

#!/bin/python3
import alias.txt

alias_str = "ma <alias>\nmda -a <alias> mail-relay <alias>@ant.domain.com\n"
print (alias_str.replace("<alias>", "<aliases from alias.txt>"))

So the output should be something like;

ma alias1
mda -a alias1 mail-relay [email protected]

ma alias2
mda -a alias2 mail-relay [email protected]

etc...

Where the alias file looks like;

alias1
alias2
alias3
etc...

Upvotes: 1

Views: 1265

Answers (1)

Nordle
Nordle

Reputation: 3001

You would have to open and read the file, as opposed to importing it:

with open('alias.txt') as f:
    for alias in f:
        alias_str = "ma <alias>\nmda -a <alias> mail-relay <alias>@ant.domain.com\n"
        print (alias_str.replace("<alias>", alias.strip()))

and if you want to create a new file, instead of just printing the lines:

with open('alias.txt') as f:
    with open('alias2.txt', 'w') as f2:
        for alias in f:
            alias_str = "ma <alias>\nmda -a <alias> mail-relay <alias>@ant.domain.com\n"
            f2.write(alias_str.replace("<alias>", alias.strip()))

Upvotes: 3

Related Questions