Extract email addresses from text file using regex with bash or command line

Question

How can I grep out only the email address using a regex from a file with multiple lines similar to this. (a sql dump to be precise)

Unfortunately I cannot just go b

Answer 1

You can solve it using python with the help of the built-in csv module and the external validators module, like this:

import validators
import csv
import sys

with open(sys.argv[1], newline='') as csvfile:
    csvreader = csv.reader(csvfile)
    for row in csvreader:
        for field in row:
            if validators.email(field):
                print(field)

Run it like:

python3 script.py infile

That yields:

cgreen@blah.com