On 2015-06-18 18:57, Gilcan Machado wrote:
Hi,
I'm trying to write a list of dictionaries like:
people = (
{'name':'john', 'age':12} ,
{'name':'kacey', 'age':18}
)
That's not a list; it's a tuple. If you want a list, use '[' and ']'.
I've thought the code below would do the task.
But it doesn't work.
And if I "print(people)" what I get is not the organize data structure
like above.
Thanks of any help!
[]s
Gilcan
#!/usr/bin/env python
from collections import defaultdict
You don't need a defaultdict, just a normal dict.
This creates an empty defaultdict whose default value is a dict:
person = defaultdict(dict)
people = list()
This puts some items into the dict:
person['name'] = 'jose'
person['age'] = 12
This puts the dict into the list:
people.append(person)
This _reuses_ the dict and overwrites the items:
person['name'] = 'kacey'
person['age'] = 18
This puts the dict into the list again:
people.append(person)
The list 'people' now contains 2 references to the _same_ dict.
for person in people:
print( person['nome'] )
Initially there's no such key as 'nome' (not the spelling), so it
creates one with the default value, a dict.
If you print out the people list, you'll see:
[defaultdict(<class 'dict'>, {'name': 'kacey', 'age': 18, 'nome': {}}),
defaultdict(<class 'dict'>, {'name': 'kacey', 'age': 18, 'nome': {}})]
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