How to save changes in a dictionary in a loop?

Question

I added key and value to my dictionary in a loop but I want to save the changes but we don't have a method like append in dictionary.
My code:
for i in range(1):
a = input()
a = a.split()
for i in range(len(a)-1):
b = {a[i+1]:a[0]}
print(b)
______
Now for example:

Sample input:
hi hola hao

Sample output:
{'hola':'hi','hao':'hi'}
_____
But my output is:
{'hao':'hi'}
Is there any method which I can save it to dictionary?

Answer 1

Your expectation can be written as :

a = input().split()
c =dict()
for i in range(len(a)-1):
c[a[i+1]]=a[0]
print(c)

Hope it helps..

Answer 2

Amirreza Hashemi ,

i am not sure if it can help you, but you can use dict.update(...) to add a new key : value pair. here is a sample what you can do with it:

https://code.sololearn.com/cQ0kf0HzeK36/?ref=app

Answer 3

Jayakrishna🇮🇳 my expected output is:
Writing a number first! It will be th number of inputs
For example:
2
hi hola hel
hey hello hiya

Output:
{'hola' : 'hi' , 'hel' : 'hi' , 'hello' : 'hey' , 'hiya' : 'hey' }

Answer 4

Oh.. I did not checked code output..
You can run above correct working code in twice in a loop.. or define function with above working code and call twice or use like this with update() method :

d={}
for i in range(2):
a = input().split()
v=[]
for i in a:
v.append(i)
c =dict()
for i in range(len(v)-1):
c[v[i+1]]=v[0]
d.update(c)
print(d)

#i created global dictionary and added inner dictionary to global dictionary.

Answer 5

Jayakrishna🇮🇳 thx now It really helped me!

Answer 6

Lothar thank you I didn't know about it. Thanks for sharing good things

Answer 7

Jayakrishna🇮🇳
Thanks. Now what if we change the range?
v=[]
for i in range(2):
a = input().split()
for i in a:
v.append(i)
c =dict()
for i in range(len(v)-1):
c[v[i+1]]=v[0]
print(c)
_______
In this case for example Range 2:
Sample input:
Hi hello
Hey hola hiya
Output:
{'hello':'Hi','hola':'Hey', 'hiya':'Hey'}
Do you have any solution for that ?

Answer 8

The output is correct only...
What is your expected output..?

In previous code, you have only one iteration and so there is no need of loop so I removed it. If you want more than once, you can use loop..