If you need to convert a String to a Double in your Python code:

Python doesn’t have a separate double type — float() gives you a 64-bit double-precision floating point number, which is equivalent to double in C or Java. I hit this when parsing numeric strings from CSV files and API responses that needed to be used in calculations.

Option 1 – Convert String to Double using float()

string = '1234.5678'
myfloat = float(string)
print(myfloat)

Option 2 – Convert String to Double using decimal.Decimal()

from decimal import Decimal

string = '1234.5678'
myfloat = Decimal(string)
print(myfloat)

Use Decimal when you need exact precision — financial calculations, for example, where floating-point rounding errors would cause problems. For most general-purpose work, float() is fine.