How to combine 2 lists into 1 dictionary in Python?

Question

Python

There are 2 lists:
ID_Masterok = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
ID_Master = ['Master ID', '654', '2425', '654', ' 654', '—', '—', '—', '—', '—', '—'] Executing

:
ID_Mastework = dict(zip(ID_Master, ID_Masterok))
Returns: {'Master ID': 0, '654': 4, '2425': 2 , '—': 10}

I want something like this: {'Master ID': 0, '654': [1, 3, 4], '2425': 2, '—': [7, 8, 9, 10]}

Answer 1

def mastework(id_key, id_value):
    id_join = {}
    for k, v in zip(id_key, id_value):
        id_join[k] = id_join.get(k, []) + [v]
    return {k:v if len(v) > 1 else v[0] for k, v in id_join.items()}

Example:

ID_Masterok = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
ID_Master = ['Интендификатор мастера', '654', '2425', '654', '654', '—', '—', '—', '—', '—', '—']

ID_Mastework = mastework(ID_Master, ID_Masterok)
print(ID_Mastework)

In [55]:
{'Интендификатор мастера': 0, '654': [1, 3, 4], '2425': 2, '—': [5, 6, 7, 8, 9, 10]}

Answer 2

I did not see such a function, it's easier to write by hand:

def zzip(ID_Master,ID_Masterok):
  result = {}
  for i in ID_Masterok:
    if ID_Master[i] in result:
      if isinstance(result[ID_Master[i]],list):
        result[ID_Master[i]].append(i)
      else:
        result[ID_Master[i]] = [result[ID_Master[i]],i]
    else:
      result[ID_Master[i]] = i
  return result