Changing text using Python

Question

I am attempting to replace text from a source file into a new file. The replacing of text works for one line, but a few lines down and I fail to replace text sitting in the middle of a statement.

Here is the source text. The words in brackets are what I am trying to replace, without changing the characters around the words:

[set interfaces] ge-0/0/0 [description] "OoB Mgmt Connection"

This is what I would like to output:

interface x/x name "xxx" (also adding quotations for the xxx text after "name")

However the output text replaces once, and then keeps three copies of the original text:

    hostname "EX4300"
    set system host-name EX4300
    set system host-name EX4300
    set system auto-snapshot
    set system auto-snapshot
    set system auto-snapshot

Here is my code:

    with open("SanitizedFinal_E4300.txt", "rt") as fin:
         with open("output6.txt", "wt") as fout:
              for line in fin:
                  fout.write(line.replace('set system host-name EX4300', 'hostname "EX4300"'))
                  fout.write(line.replace('set interfaces ge-0/0/0 unit 0 family inet address', 'ip address'))

Please let me know where I went wrong or if there is a better way of approaching this. I am using Visual Studio Code.

It is unclear to me what you're trying to do. Can you give a complete source text, and a complete desired output? — theherk
– theherk, Commented Jan 18, 2022 at 21:08
just like your previous version of this question, it is still unclear what you want to search and replace — rioV8
– rioV8, Commented Jan 18, 2022 at 22:45

rioV8 · Accepted Answer · 2022-01-18 22:45:05Z

1

Only use 1 fout.write(), call the replace function al often as you want.

with open("SanitizedFinal_E4300.txt", "rt") as fin:
    with open("output6.txt", "wt") as fout:
        for line in fin:
            line = line.replace('set system host-name EX4300', 'hostname "EX4300"')
            line = line.replace('set interfaces ge-0/0/0 unit 0 family inet address', 'ip address')
            fout.write(line)

answered Jan 18, 2022 at 22:45

rioV8

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