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Distance class

Every day you have morning running. You want to store your result. For easier calculating, comparison and printing your result write class Distance.

Distance's __init__ method takes only one argument km and saves it to self.km.

For Distance class you should implement such magic methods:

__init__
distance = Distance(20)  # distance.km == 20

__str__
distance = Distance(20)
print(distance)  # "Distance: 20 kilometers."

__repr__
distance = Distance(20)
repr(distance)  # "Distance(km=20)"

__add__
distance1 = Distance(20)
distance2 = Distance(30)
distance3 = distance1 + distance2  

# isinstance(distance3, Distance) is True
# distance3.km == 50

distance1 = Distance(20)
distance2 = distance1 + 10

# isinstance(distance2, Distance) is True
# distance2.km == 30
# both variants ^ are possible

__iadd__
distance1 = Distance(20)
distance2 = Distance(30)
distance1 += distance2  # distance1.km is 50

distance = Distance(20)
distance += 30  # distance.km == 50

__mul__
distance1 = Distance(20)
distance2 = distance1 * 5  

# isinstance(distance2, Distance) is True
# distance2.km == 100

__truediv__
distance1 = Distance(20)
distance2 = distance1 / 7  

# isinstance(distance2, Distance) is True
# distance2.km == 2.85
# Note: rounded to 2 decimals

__lt__, __gt__, __eq__, __le__, __ge__
distance = Distance(50)
distance < Distance(60)  # True  # distance.km < 60 == True
distance > Distance(120)  # False
distance == Distance(100)  # False
distance <= Distance(49)  # False
distance >= Distance(50)  # True

distance < 60  # True  # distance.km < 60 == True
distance > 120  # False
distance == 100  # False
distance <= 49  # False
distance >= 50  # True

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