Decimalize floats with the python decimal module

decimalize.py

import decimal

value1 = 29.458699990
value2 = 0.458699990
decimal_places = 2

def decimalize(value, decimal_places):
    """Round a value to a specified decimal place."""
    left_of_decimal, the_decimal, right_of_decimal = str(value).partition(".")
    if left_of_decimal == str(0):
        decimal_places -= 1
    decimal.getcontext().prec = len(left_of_decimal) + decimal_places
    return decimal.Decimal(value) * 1

# decimalize(value1, decimal_places)
# decimalize(value2, decimal_places)

# Output
# ------
# 29.46
# 0.46