import re
patron = r'\/\/([^\/]+)\/.+\.(zip|rar)'
file = open('text.txt', 'r+')
text = file.read()
for linea in text:
m = re.search(patron, linea)
if m:
linea = linea.replace(m.group(1), "miserver.com")
file.seek(0)
file.write(linea)
file.truncate()
file.close()
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