How to create new dictionary by selecting particular keys using fromkey() in python Dictionary?

Question

I created the dictionary named as Colors.

Colors = {'col1': 'Red', 'col2': 'Orange', 'col3': 'Yellow', 'col4': 'Yellow'}

Q) Create a new Dictionary object colors_new from the colors Dictionary, having the keys col1 and col2 (Instruction – Use the fromkeys() method)? is it possible to use fromkeys()?

My coding is :

Colors = {'col1': 'Red', 'col2': 'Orange', 'col3': 'Yellow', 'col4': 'Yellow'}

print(Colors)

Col={ }

Colors_new={ }

print(Colors_new)

Colors_new = dict.fromkeys(Colors.keys())

print(Colors_new)

OUTPUT

{'col1': 'Red', 'col2': 'Orange', 'col3': 'Yellow', 'col4': 'Yellow'}
{}
{'col1': None, 'col2': None, 'col3': None, 'col4': None}

Welcome to SO. It seems a program assignment. What have you done till now? Show us your attempts and then we can start from them — Nikaido, Nov 08 '19 at 10:48
I assume you want something like colors_new = dict.fromkeys(colors.keys()) — Vaghinak, Nov 08 '19 at 10:51

Tim Körner · Answer 1 · 2019-11-08T12:18:40.623

1

Yes this is indeed possible.

colors_new = dict.fromkeys(Colors.keys()[:2])

edited Nov 08 '19 at 12:18

answered Nov 08 '19 at 10:51

Tim Körner

385
2
9

Nope. I need only col1 and col2. – SHENBGA BHARATHA PRIYA Nov 08 '19 at 11:28
while using dictionary slicing, i got error as follows .. .. .. TypeError: 'dict_keys' object is not subscriptable – SHENBGA BHARATHA PRIYA Nov 09 '19 at 04:28

score 0 · Answer 2 · answered Nov 08 '19 at 13:46

0

Is this maybe what you want?

Colors = {'col1': 'Red', 'col2': 'Orange', 'col3': 'Yellow', 'col4': 'Yellow'}
print(Colors)
Col={ }
Colors_new={ }
print(Colors_new)
# if you want the new dictionary with only the keys
Colors_new = dict.fromkeys([k for k in Colors.keys() if k in ["col1", "col2"]])
print(Colors_new)
# if you want the new dictionary with keys and values
Colors_new = {k:v for k,v in Colors.items() if k in ["col1", "col2"]}
print(Colors_new)

answered Nov 08 '19 at 13:46

Nikaido

4,443
5
30
47

Good work . Tanq. One more thing i need to clarify is... is it possible to create new dictionary without "none", while using fromkeys() . – SHENBGA BHARATHA PRIYA Nov 09 '19 at 04:25

How to create new dictionary by selecting particular keys using fromkey() in python Dictionary?

2 Answers2