import re
a = ['\ntest_ dev\n$', 'pro gra', 'test\n', 'test\n']
def remove_tags_newline(text):
return "".join(re.sub('(?s)\n.*', '', text.strip()).split())
print( [remove_tags_newline(x) for x in a] )
aW1wb3J0IHJlCmEgPSBbJ1xudGVzdF8gZGV2XG4kJywgJ3BybyBncmEnLCAndGVzdFxuJywgJ3Rlc3RcbiddCmRlZiByZW1vdmVfdGFnc19uZXdsaW5lKHRleHQpOgogICAgcmV0dXJuICIiLmpvaW4ocmUuc3ViKCcoP3MpXG4uKicsICcnLCB0ZXh0LnN0cmlwKCkpLnNwbGl0KCkpCnByaW50KCBbcmVtb3ZlX3RhZ3NfbmV3bGluZSh4KSBmb3IgeCBpbiBhXSAp