Question

How to join tuples if the initial element are similar in Python

Answer 1

from collections import defaultdict

list_tpl = [(4, 9), (4, 0), (5, 6), (5, 83), (4, 3), (6, 11)]
 
_map = defaultdict(list)
for key, val in list_tpl:
    _map[key].append(val)

result = [(key, *val) for key, val in _map.items()]
 
print(result)




'''
run:

[(4, 9, 0, 3), (5, 6, 83), (6, 11)]

'''

 

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Answer 2

list_tpl = [(4, 9), (4, 0), (5, 6), (5, 83), (4, 3), (6, 11)]
 
dict = {}
for t in list_tpl:
    dict[t[0]] = dict.get(t[0], []) + list(t[1:])
 
result = [(key,) + tuple(val) for key, val in dict.items()]
 
print(result)





'''
run:

[(4, 9, 0, 3), (5, 6, 83), (6, 11)]

'''

 

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