method to remove zero digits from fraction in decimal

[wavic]

In [1]: import math

In [2]: x = lambda num: int(f[1]) if (f := math.modf(num))[0] == 0 else f[0] + f[1]

In [3]: x(4.0)
Out[3]: 4

In [4]: x(4.1)
Out[4]: 4.1

Just noticed you are talking about decimal.Decimal numbers.
It works with those too. Just tested

In [5]: import decimal

In [6]: num = decimal.Decimal('37')

In [7]: x(4.1)
Out[7]: 4.1

In [8]: x(4.0)
Out[8]: 4

In [9]: x(num)
Out[9]: 37

In [10]: num = decimal.Decimal('37.0')

In [11]: x(num)
Out[11]: 37

In [12]: num = decimal.Decimal('37.1')

In [13]: x(num)
Out[13]: 37.1

Ignore in/out 7 and 8. I repeated them by mistake