24-hour time in Python

Suppose we have a string s. Here s is representing a 12-hour clock time with suffixes am or pm, we have to find its 24-hour equivalent.

So, if the input is like "08:40pm", then the output will be "20:40"

To solve this, we will follow these steps −

• hour := (convert the substring of s [from index 0 to 2] as integer) mod 12

• minutes := convert the substring of s [from index 3 to 5] as integer

• if s[5] is same as 'p', then

  • hour := hour + 12

• return the result as hour:minutes

Let us see the following implementation to get better understanding −

Example

class Solution:
   def solve(self, s):
      hour = int(s[:2]) % 12
      minutes = int(s[3:5])
      if s[5] == 'p':
         hour += 12
      return "{:02}:{:02}".format(hour, minutes)
ob = Solution()
print(ob.solve("08:40pm"))

Input

"08:40pm"

Output

20:40