CODEWITHSUNDEEP
pythonlistfor-loopwhile-loop
lincplus htm
lincplus htm

Reputation: 95

How to convert while loop to for loop in python?

list_from=[1,2,3,4,5,6,7,8,9,10]
list_from2=[a,b,c,d,e,f,g,h,i,j]
from_dict={list_from[i]:list_from2[i] for i in range(len(list_from2))}
list_to = [1,2,5,10]
save=[]
num=0
while num<=len(list_to):
    try:
        if list_to[num] in list_from:
            save.append(from_dict[list_to[num]])
        else:
            save.append('')
       num+=1
   except:
        break

I have the code like the above. I want to convert this while loop code to for loop. (Also, if possible, I want convert to list comprehension code) How can I do this? Thanks for your help.

Upvotes: 0

Views: 658

Answers (2)

Adept
Adept

Reputation: 554

You can just replace your

num = 0
while num <= len(list_to):

By

for num in range(0, len(list_to)):

This way, your variable "num" would automatically take value 0, then 1, ... len(list_to)-1

Upvotes: 4

Niranjan Krishna
Niranjan Krishna

Reputation: 11

With For loop

for i in range(len(list_to)):
    if list_to[i] in list_from:
        save.append(from_dict[list_to[i]])
    else:
        save.append('')

Upvotes: 1

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