How to convert a Treasury price to decimal in python and vice versa

TreasuryPricing.py

# Convert Treasury price to decimal in python
# calculating US treasury pricing in python

def treasury_to_decimal(price):
    """
    Converts a treasury priced in 32nds into a decimal. This works for
    treasurys priced up to 3dp i.e. "99-126"
    """
    price_split = price.split("-")
    integer_part = int(price_split[0])
    frac_part = price_split[1]

    frac_part_one = float(frac_part[0:2])
    frac_part_two = float(0)

    if len(frac_part) == 3:
        last_digit = frac_part[-1]
        if last_digit == "+":
            frac_part_two = float(4)
        else:
            frac_part_two = float(last_digit)
    elif len(frac_part) > 3:
        raise ValueError("4 decimal places are not supported")

    return integer_part + (frac_part_one + (frac_part_two/8))/32


# Convert decimal price to treasury in python
def decimal_to_treasury(price):
    """
    Converts a treasury priced in 32nds into a decimal. This works for
    treasurys priced up to 2dp i.e. "99-12"
    """
    integral = int(price.partition(".")[0])
    price = float(price)
    decimal_part = str((price-integral)*32)
    conversion = ""
    if ".5" in decimal_part:
        decimal_part = decimal_part.partition(".")[0]
        if float(decimal_part) < 10:
            conversion = f"{integral}-0{decimal_part}+"
        else:
            conversion = f"{integral}-{decimal_part}+"
    else:
        decimal_part = decimal_part.partition(".")[0]
        if float(decimal_part) < 10:
            conversion = f"{integral}-0{decimal_part}"
        else:
            conversion = f"{integral}-{decimal_part}"
    return conversion


# EXAMPLES
treasurys = ["99-226", "103-27+", "99-032"]
for t in treasurys:
    print(treasury_to_decimal(t))

decimals = ["99.421875", "108.03125", "105.71875"]
for d in decimals:
    print(decimal_to_treasury(d))