Comparing two lists in Python

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So to give a rough example without any code written for it yet, I'm curious on how I would be able to figure out what both lists have in common.

Example:

listA = ['a', 'b', 'c']
listB = ['a', 'h', 'c']

I'd like to be able to return:

['a', 'c']

How so?

Possibly with variable strings like:

john = 'I love yellow and green'
mary = 'I love yellow and red'

And return:

'I love yellow and'
list python variables comparison string
4 Answers

i think this is what u want ask me anything about it i will try to answer it

    listA = ['a', 'b', 'c']
listB = ['a', 'h', 'c']
new1=[]
for a in listA:
    if a in listB:
        new1.append(a)

john = 'I love yellow and green'
mary = 'I love yellow and red'
j=john.split()
m=mary.split()
new2 = []
for a in j:
    if a in m:
        new2.append(a)
x = " ".join(new2)
print(x)
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