Question

How to group a list of tuple by using dictionary in Python

Answer 1

lst_tpl = [(1, 30), (6, 50), (7, 30), (2, 50), (0, 50), (3, 20)] 
  
dic = {} 
for x, y in lst_tpl: 
    if y in dic: 
        dic[y].append((x, y)) 
    else: 
        dic[y] = [(x, y)] 
  
print(dic) 


'''
run:

{30: [(1, 30), (7, 30)], 50: [(6, 50), (2, 50), (0, 50)], 20: [(3, 20)]}

'''

 

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Answer 2

lst_tpl = [(1, 'aa'), (6, 'bb'), (7, 'aa'), (2, 'bb'), (0, 'bb'), (3, 'cc')] 
  
dic = {} 
for x, y in lst_tpl: 
    if y in dic: 
        dic[y].append((x, y)) 
    else: 
        dic[y] = [(x, y)] 
  
print(dic) 


'''
run:

{'aa': [(1, 'aa'), (7, 'aa')], 'bb': [(6, 'bb'), (2, 'bb'), (0, 'bb')], 'cc': [(3, 'cc')]}

'''

 

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