How to accept the input of both int and float types?

Question

I am making a currency converter. How do I get python to accept both integer and float?

This is how I did it:

def aud_brl(amount,From,to):
    ER = 0.421         


        

Answer 1

amount==int doesn't make sense. input gives us a string. int (and float) is a function. A string never equals a function.

In [42]: x=input('test')
test12.23
In [43]: x
Out[43]: '12.23'
In [44]: int(x)
....
ValueError: invalid literal for int() with base 10: '12.23'
In [45]: float(x)
Out[45]: 12.23

float('12.23') returns a float object. int('12.23') produces an error, because it isn't a valid integer string format.

If the user might give either '12' or '12.23', it is safer to use float(x) to convert it to a number. The result will be a float. For many calculations you don't need to worry whether it is a float or integer. The math is the same.

You can convert between int and floats if needed:

In [45]: float(x)
Out[45]: 12.23
In [46]: float(12)
Out[46]: 12.0
In [47]: int(12.23)
Out[47]: 12
In [48]: round(12.23)
Out[48]: 12

You can also do instance tests

In [51]: isinstance(12,float)
Out[51]: False
In [52]: isinstance(12.23,float)
Out[52]: True
In [53]: isinstance(12.23,int)
Out[53]: False
In [54]: isinstance(12,int)
Out[54]: True

But you probably don't need to do any those.