[Answered ]-If the value recieved in a Decimal Form is an empty string how can I convert it to a float number?

You can use or; given a string s, s or 0 will evaluate to 0 if s is empty:

s = ''
print(float(s or 0)) # 0.0

s = '123'
print(float(s or 0)) # 123.0

This happens because (in python) x or y returns x if x is true, and y if x is false. Since an empty string is "falsy", '' or 0 is equal to 0.