Rational with Symbol

[Nico Schlömer]

I have a function that takes in an integer value and returns a symbolic fraction of it, e.g.,

```

def r(n):

    return sympy.Rational(n, 261)

```

I would like to be able to provide integers and sympy.Symbols alike, but the latter fails with

```

TypeError: invalid input: n

```

-- Right, one can simply use `n/261`.

Since Rationals appear quite frequently in my code, I would like to avoid constructions like

```

x = n/261 if isinstance(n, sympy.Atom) else sympy.Rational(n, 261)

```

(where sympy.Atom wouldn't even cover cases like `2n+1` in either numerator or denominator).

Is there a way to support integer and symbolic fractions from one interface?

Cheers,

Nico

[Kalevi Suominen]

You could probably use  n/sympy.Integer(261),  or briefly  n/S(261)  where  S = sympy.sympify.

Kalevi Suominen