CODEWITHSUNDEEP
pythonlistcomparetuples
Marjoram
Marjoram

Reputation: 413

Checking if a list of tuples are the same

Is there an easy way to see if a list of tuples in python are the same (same tuple in each position, where a tuple is the same if their corresponding elements are the the same)? I know how to manually loop through the list and compare each element, but was wondering if there were any library functions that could do this?

Upvotes: 4

Views: 2274

Answers (3)

Chidi
Chidi

Reputation: 991

In python 3.x, you can check if two lists of tuples a and b thus:

import operator

a = [(1,2),(3,4)]
b = [(3,4),(1,2)]
# convert both lists to sets before calling the eq function
print(operator.eq(set(a),set(b))) #True

Upvotes: 0

Haresh Shyara
Haresh Shyara

Reputation: 1886

You can use cmp() compares elements of two lists.

list1 = [('a', 1), ('b', 1)]
list2 = [('a', 1), ('b', 1)]

print cmp(list1, list2)

If we reached the end of one of the lists, the longer list is "larger." If we exhaust both lists and share the same data, the result is a tie, meaning that 0 is returned.

Upvotes: 4

Mark Ransom
Mark Ransom

Reputation: 308206

len(list1) == len(list2) and all(a == b for a,b in zip(list1, list2))

That was my first guess, but I just tried the obvious and simple solution and that worked too:

list1 == list2

Upvotes: 2

Related Questions