Convert Rational to Float

[sandona...@gmail.com]

Hello,

consider this trivial example:

x = symbols("x")

expr = S(10) / 3 * exp(S(5) / 2) * x**(S(5) / 2)

I would like to convert all rational numbers to float. I though it would be easy, for example:

expr.replace(lambda e: e.is_Rational, lambda e: e.evalf())

However, Rational numbers in the exponents are not converted. Why?

Thanks in advance!

[Oscar Benjamin]

I'm not sure why that doesn't work but you can just use evalf directly:

In [7]: expr
Out[7]:
5/2 5/2
10⋅x ⋅ℯ
────────────
3

In [8]: expr.n()
Out[8]:
2.5
40.6083132023449⋅x

Oscar

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[Aaron Meurer]

Possibly related issue https://github.com/sympy/sympy/issues/19774

Aaron Meurer

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