The solution for the problem I previously posted this month.

Of course, I had eval() in my mind:

>>> import math >>> x=1.234 >>> s=str(eval("math.sin(x)")) >>> s '0.9438182093746337' >>> s=str(eval("math.sin(1.234)")) >>> s '0.9438182093746337' >>>

Warning: it's to be used with care...

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