Creating a dictionary from a list

[Inkanus]

Hello. I'm having trouble creating a dictionary from a list. I have a list with names. I am supposed to build a dictionary on its basis. Each name has to be assigned the number of characters for the name. Using 'len', John is 4 characters. I have a list

name_list = ["John", "Michael", "Terry", "Eric", "Graham"]

Now I don't know how to make a dictionary out of this list. I did something like this but it's a collection.

name_dictionary = {'John', 'Michael', 'Terry', 'Eric', 'Graham'}
for i in name_dictionary:
  print(i, len(i))

Generally, there is to be a list first, and then a dictionary from that list. Does anyone know how to do this? best regards

[deanhystad]

Do you know how to add a key/value to a dictionary?

[Axel_Erfurt]

name_list = ["John", "Michael", "Terry", "Eric", "Graham"]

name_dictionary = { i : name_list[i] for i in range(0, len(name_list) ) }

print(name_dictionary)

for v in name_dictionary.items():
  print(v)

Output:
{0: 'John', 1: 'Michael', 2: 'Terry', 3: 'Eric', 4: 'Graham'}
(0, 'John')
(1, 'Michael')
(2, 'Terry')
(3, 'Eric')
(4, 'Graham')

look at https://thispointer.com/python-how-to-co...ictionary/

[perfringo]

If I correctly understand the objective then I would do:

>>> name_list = ["John", "Michael", "Terry", "Eric", "Graham"]
>>> d = dict(enumerate(name_list))
>>> d
{0: 'John', 1: 'Michael', 2: 'Terry', 3: 'Eric', 4: 'Graham'}
>>> d = dict(enumerate(name_list, start=1))
>>> d
{1: 'John', 2: 'Michael', 3: 'Terry', 4: 'Eric', 5: 'Graham'}

[deanhystad]

From the original post:

Each name has to be assigned the number of characters for the name.

name_list = ["John", "Michael", "Terry", "Eric", "Graham"]
name_len = {name:len(name) for name in name_list}

[DeaD_EyE]

name_dictionary = {'John', 'Michael', 'Terry', 'Eric', 'Graham'}
for i in name_dictionary:
    print(i, len(i))

name_dictionary is a set and not a dictionary.

# this is a dictionary
color_mapping = {'blue': (0,0,255), 'green': (0,255,0), 'red': (255,0,0)}

color_keys = list(color_mapping) # implicit keys
color_keys = list(color_mapping.keys()) # it's explicit
color_values = list(color_mapping.values())
color_items = list(color_mapping.items())


print(color_keys)
print(color_values)
print(color_items)

Adding a value to a key of an existing dict:

my_dict = {} # empty curly braces == dict
my_dict["a_string"] = "some value asigned to key a_string"