CODEWITHSUNDEEP
tuples
stasisOo
stasisOo

Reputation: 133

Checking if at least 1 tuple is in another list of tuples in python

I'm trying to build a function to check 2 lists of tuples, and return True if at least one of the tuples is in the other list:

def g32(x, y):

    for i in range(len(x)):
        for j in range(len(y)):
            if x[i] in y[j]:
                return True
    return False

g32( [(3,5),(2,8)] , [(6,5),(3,5),(7,2)])
False

Expected True since (3,5) is in both lists, ideas? Thanks

p.s would like to use simple syntax like this since it's for school and some built in python functions can't be used

Upvotes: 0

Views: 36

Answers (1)

eyllanesc
eyllanesc

Reputation: 244301

If you use the in operator in a tuple, it will return the elements of this. In your case you will be comparing: if (3, 5) in 3: and if (3, 5) in 5:, in each case returns False.

Must be use: 

def g32(x, y):
    for i in range(len(x)):
        if x[i] in y:
            return True
    return False

print(g32( [(3,5),(2,8)] , [(6,5),(3,5),(7,2)]))

Output:

True

Suggestion:

def g32(x, y):
    for X in x:
        if X in y:
            return True
    return False

If there is a change of order:

def g32(x, y):
    for X in x:
        if X in y:
            return True
        if (X[1], X[0]) in y:
            return True

    return False

print(g32( [(3,5),(2,7),(4,4),(8,3)] , [(6,5),(3,3),(7,2)] ))

Output:

True

Upvotes: 1

Related Questions