Text Decompression. One of my test cases failed

Question

This is the first medium difficulty challenge I have done and although I have probably done it in the most convoluted and messy way possible, I feel somewhat accomplished in that I have at least passed most of the test cases. My questions are, how could my code be tidied up, and how could I make sure the final test case also passed?

txt=input()
def split(txt):
return[char for char in txt]

def num(lst):
nums=[]
letts=[]
for x in lst:
if x.isdigit()==True:
nums.append(x)
else:
letts.append(x)
for i in range(0, len(nums)):
nums[i]=int(nums[i])
zip1=zip(letts, nums)
dict1=dict(zip1)
return(dict1)

def decom(y):
fin=""
for key in y:
fin+=(key*y[key])
return(fin)

print(decom(num(split(txt))))

Answer 1

The one testcase that failed probably has double or higher digit numbers. You only split off single digits.

Answer 2

If it helps, itertools has a groupby function. For example,

import itertools as it

iter(''.join(x) for (_, x) in it.groupby(s, str.isdigit))

This will give you an iterator over all strings and numbers in a string s separated. For example,

s = '1a33b54q2a'
will be split into
['1', 'a', '33', 'b', '54', 'q', '2', 'a']

Answer 3

Good luck 🍀👍

Answer 4

Ah that makes sense, back to the drawing board then

Answer 5

Ah thank you, that sounds ideal, I think I'm going to need to go back to the lessons on lambda

Answer 6

here is a try, that is following a different approach. i am sure that it will not win the first price in pythonocness. 😁

i have included some comments, also some print-outs, thst can be removed. so finally it is just 4 lines of code.

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