# Measure Lengths of Time in Python Assignment Solution

June 20, 2024
Dr. Matthew
🇨🇭 Switzerland
Python
Dr. Matthew Hernandez, an esteemed Computer Science researcher, obtained his PhD from ETH Zurich, Switzerland. With 6 years of experience under his belt, he has successfully completed over 400 Python assignments, demonstrating his proficiency and commitment to excellence.
Key Topics
• Instructions
• Objective
• Requirements and Specifications
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## Instructions

### Objective

Write a python assignment program to measure lengths of time.

## Requirements and Specifications

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Source Code

```class time: hour = 0 minute = 0 second = 0 def __init__(self, hour, minute, second): self.hour = hour self.minute = minute self.second = second def __str__(self): return str(self.hour) + ':' + '{:02d}'.format(self.minute) + ':' + '{:02d}'.format(self.second) def __repr__(self): return str(self) def __eq__(self, other): return self.hour == other.hour and self.minute == other.minute and self.second == other.second def __le__(self, other): if self.hour < other.hour: return True if self.hour > other.hour: return False if self.minute < other.minute: return True if self.minute > other.minute: return False return self.second <= other.second def __lt__(self, other): if self.hour < other.hour: return True if self.hour > other.hour: return False if self.minute < other.minute: return True if self.minute > other.minute: return False return self.second < other.second def __add__(self, other): s = (other.second + self.second) % 60 carry_s = (other.second + self.second) // 60 m = (other.minute + self.minute + carry_s) % 60 carry_m = (other.minute + self.minute + carry_s) // 60 h = other.hour + self.hour + carry_m return time(h, m, s) def __sub__(self, other): s = (self.second - other.second + 60) % 60 carry_s = 0 if self.second < other.second: carry_s = 1 m = (self.minute - other.minute - carry_s + 60) % 60 carry_m = 0 if self.minute < other.minute + carry_s: carry_m = 1 h = other.hour - self.hour - carry_m return time(h, m, s) if __name__ == '__main__': time1 = time(1, 2, 3) print(time1.minute) print(time1) time2 = time(1, 59, 58) print(time1 < time2) print(time1 == time2) print(time1 <= time2) print(time1 + time2) print(time2 - time1) print(time1 - time2) ```

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