Extracting words from a text file-CodePudding

I have a text file, and I want to extract certain words. I would want to extract:

Astrid et al. 1980
Bertrand & Calbert 1985
Dilbert et al. 1990
Egbert, Fluff & Gilbert 2000

Here is a snippet of my code:

f=open("filename.txt", "r")

words = []
intergers  =[]
for line in f:
    # # print lines
    print(line)

    # splitted words
    words.append(line.split())
    # print(words)

    intergers = line.split('(', 1)[1].split(')')[0]

The text file contains the following:

In the beginning Astrid et al. (1980) claimed that the world was flat. 
Bertrand & Calbert (1985) regarded the world as pear-shaped (though it 
wasnâ€™t really) and it was also claimed that the world was oval (Dilbert
et al. 1990). It is now known, however, that the world is square,
following the work of Egbert, Fluff & Gilbert (2000).

CodePudding user response：

I would suggest you look into regular expressions, which you can read about

You can check the repl here: https://replit.com/@veedata/AssuredViolentSynergy