import unicodedata
from fractions import Fraction
def fraction_to_float(fraction: str) -> float:
"""Convert string representation of a fraction to float.
Also supports unicode characters.
Args:
fraction (str): String representation of fraction, ie. "3/4", "1 1/2", etc.
Returns:
float: Converted fraction
"""
# For fractions with weird divider character (ie. "1⁄2")
fraction = fraction.replace("⁄", "/")
try:
# Convert unicode fractions (ie. "½")
fraction_out = unicodedata.numeric(fraction)
except TypeError:
try:
# Convert normal fraction (ie. "1/2")
fraction_out = float(sum(Fraction(s) for s in fraction.split()))
except ValueError:
# Convert combined fraction with unicode (ie. "1 ½")
fraction_split = fraction.split()
fraction_out = float(fraction_split[0]) + unicodedata.numeric(
fraction_split[1]
)
return fraction_out
def string_to_float(input: str) -> float:
"""Convert string to float, if possible
Args:
input (str): Input string (ie. "1.5")
Returns:
float: Casted value (ie. 1.5), or None if conversion was not possible
"""
try:
output = float(input)
except ValueError:
output = None
return output
