Python equivalent to sed [solved]

[nilamo]

time ="14:00"
content = os.popen("sed -n '/time/, +3p' mon").read()

It would be a crazy world indeed, if all your variables were just injected into strings. You need to specifically let python know in some way that you expect interpolation to be taking place:

>>> time = "14:00"
>>> "spam /time/ eggs"
'spam /time/ eggs'
>>> "spam /{0}/ eggs".format(time)
'spam /14:00/ eggs'
>>> f"spam /{time}/ eggs"
'spam /14:00/ eggs'