list behavior

[Rene Aguirre]

Hello everybody,

I needed to add a list to a dictionary, something very simple:

d = {}
l = []
l.append(1)
d["one"] = l
d

{'one': [1]}

Buen, when I just move the 'append' statement to the dictionary
assigment then:

l = []
d = {}
d["one"] = l.append(1)
d

{'one': None}

Not what I expected, then I came to the conclusion that
[].append(value) returns 'None', why?

Rene A.

 

[anton muhin]

Hello everybody,

I needed to add a list to a dictionary, something very simple:

d = {}
l = []
l.append(1)
d["one"] = l
d

{'one': [1]}

Buen, when I just move the 'append' statement to the dictionary
assigment then:

l = []
d = {}
d["one"] = l.append(1)
d

{'one': None}

Not what I expected, then I came to the conclusion that
[].append(value) returns 'None', why?

Rene A.

append is what is called procedure in other languages.

d["one"].append(1) should work

hth,
anton.