Check Overlap in a List

Question

List = [[10,17],[13,15],[13,17]]

for x in list:
    x_list = x_list + [x[0]]
    y_list = y_list + [x[1]]

Result:

x_list = [10, 13, 13]
y_list = [17, 15, 17]

This is what I did to separate the values. How do I check if there is an overlap in x_list or y_list?

Overlap means to check if a one list has a same value for example, x_list has 13 and y_list has 17 — Ya3goobs, Oct 14 '21 at 21:31
the expexted output is x_overlap = 13 and y_overlap = 17 becuse there are more than one 13 in x_list and more than one 17 in y_list — Ya3goobs, Oct 14 '21 at 21:33

score 2 · Accepted Answer · answered Oct 14 '21 at 21:34

Use collections.Counter to count duplicates (i.e overlaps) as follows:

from collections import Counter

List = [[10,17],[13,15],[13,17]]

x_list, y_list = list(zip(*List))

overlaps_x = [e for e, c in Counter(x_list).items() if c > 1]
overlaps_y = [e for e, c in Counter(y_list).items() if c > 1]

print(overlaps_x)
print(overlaps_y)

Output

[13]
[17]

The idea is to first count the items and then output those elements with count greater than 1.

Check Overlap in a List

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