## Question

Asked By – tehryan

I want to take two lists and find the values that appear in both.

```
a = [1, 2, 3, 4, 5]
b = [9, 8, 7, 6, 5]
returnMatches(a, b)
```

would return `[5]`

, for instance.

**Now we will see solution for issue: How can I compare two lists in python and return matches **

## Answer

Not the most efficient one, but by far the most obvious way to do it is:

```
>>> a = [1, 2, 3, 4, 5]
>>> b = [9, 8, 7, 6, 5]
>>> set(a) & set(b)
{5}
```

if order is significant you can do it with list comprehensions like this:

```
>>> [i for i, j in zip(a, b) if i == j]
[5]
```

(only works for equal-sized lists, which order-significance implies).

This question is answered By – SilentGhost

**This answer is collected from stackoverflow and reviewed by FixPython community admins, is licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 **