decimal_to_fraction.py

defdecimal_to_fraction(decimal: float|str) ->tuple[int, int]:
"""
 Return a decimal number in its simplest fraction form
 >>> decimal_to_fraction(2)
 (2, 1)
 >>> decimal_to_fraction(89.)
 (89, 1)
 >>> decimal_to_fraction("67")
 (67, 1)
 >>> decimal_to_fraction("45.0")
 (45, 1)
 >>> decimal_to_fraction(1.5)
 (3, 2)
 >>> decimal_to_fraction("6.25")
 (25, 4)
 >>> decimal_to_fraction("78td")
 Traceback (most recent call last):
 ValueError: Please enter a valid number
 >>> decimal_to_fraction(0)
 (0, 1)
 >>> decimal_to_fraction(-2.5)
 (-5, 2)
 >>> decimal_to_fraction(0.125)
 (1, 8)
 >>> decimal_to_fraction(1000000.25)
 (4000001, 4)
 >>> decimal_to_fraction(1.3333)
 (13333, 10000)
 >>> decimal_to_fraction("1.23e2")
 (123, 1)
 >>> decimal_to_fraction("0.500")
 (1, 2)
 """
try:
decimal=float(decimal)
exceptValueError:
raiseValueError("Please enter a valid number")
fractional_part=decimal-int(decimal)
iffractional_part==0:
returnint(decimal), 1
else:
number_of_frac_digits=len(str(decimal).split(".")[1])
numerator=int(decimal* (10**number_of_frac_digits))
denominator=10**number_of_frac_digits
divisor, dividend=denominator, numerator
whileTrue:
remainder=dividend%divisor
ifremainder==0:
break
dividend, divisor=divisor, remainder
numerator, denominator=numerator//divisor, denominator//divisor
returnnumerator, denominator


if__name__=="__main__":
print(f"{decimal_to_fraction(2) =}")
print(f"{decimal_to_fraction(89.0) =}")
print(f"{decimal_to_fraction('67') =}")
print(f"{decimal_to_fraction('45.0') =}")
print(f"{decimal_to_fraction(1.5) =}")
print(f"{decimal_to_fraction('6.25') =}")
print(f"{decimal_to_fraction('78td') =}")