Indexed position editing of a lst

[perfringo]

If its about string replacement then there can be different scenarios:

(1) Replace one item in list (use assignment as suggested by buran):

>>> foods = ['ham', 'spam']
>>> foods[0] = ' '.join([foods[0], 'and eggs'])
>>> foods
['ham and eggs', 'spam']

(2) Replace all values, same text:

>>> foods = ['ham', 'spam']
>>> foods = [' '.join([food, 'and eggs']) for food in foods]
>>> foods
['ham and eggs', 'spam and eggs']

(3) Replace all values, different text:

>>> foods = ['ham', 'spam']
>>> add_ons = ['and eggs', 'and spam']
>>> foods = [' '.join(pair) for pair in zip(foods, add_ons)]
>>> foods
['ham and eggs', 'spam and spam']