Count the number of spaces between words in a string

Question

I am doing this problem on Hackerrank,and I came up with the idea, which includes splitting the input and join it afterwards (see my implementation below). However, one of the test cases contains the input (hello< multiple spaces> world), which crashed my code because the input string has more than 1 space between each words. So, I am just wondering if anyone could please help me out fix my code, and I am just wondering how to count how many spaces(esp multiple spaces) in a string in Python. I found how to count spaces in Java, but not in Python. For testcase, I attached the pic.

Thanks in advance.

My implementation:

input_string = input()

splitter = input_string.split()

final = []

for i in range(0,len(splitter)):
    for j in range(0,len(splitter[i])):
        if(j==0):
            final.append(splitter[i][j].upper())
        else:
            final.append(splitter[i][j])
    # Assumed that there is one space btw each words
    final.append(' ')
print(''.join(final))

For Test case pic,

Answer 1

You can fix it by splitting with pattern ' ' (whitespace)

splitter = input_string.split(' ')

You can also use .capitalize() method instead of splitting the token again

s = "hello  world         4lol"
a = s.split(' ')

new_string = ''
for i in range(0, len(a)) :
   new_string = a[i].capitalize() if len(new_string)==0 else new_string +' '+ a[i].capitalize()
print(new_string)

Output:

Hello  World         4lol

For counting number of spaces between two words, you can use python's regular expressions module.

import re    
s = "hello       world  loL"
tokens = re.findall('\s+', s)

for i in range(0, len(tokens)) :
    print(len(tokens[i]))

Output :

7
2