finding similar objects in a list

[DRPR]

[quote='DRPR' pid='50443' dateline='1529650625'] I am new to python and programming in general.I wanted to write a code which prints the similar elements from 2 lists .For example if a=[1,2,3,4,5] and b=[0,2,4,6] , I would want a c=[2,4]. Of course, experienced Pythonista would write it at least as

[elem for elem in list1 if elem in list2]

and there are couple of other ways to write it - but that will come in the future. Good luck with your studies!

I did the method for the experienced pythonista! but it returned a an error:

def simi1(list1,list2):
    c=[]
    [elem for elem in list1 if elem in list2]
    c.append(elem)
    return(c)

Error:
NameError: name 'elem' is not defined

Any tips?