Unicode symbol as variable

[Diego Mundo]

Trying to use 'γ' as a custom variable in parse_expr with python 2. ...Is this at all possible? I was able to do it with python 3, but my particular project requires python 2.

[Jason Moore]

Python 2 does not support unicode variable names:

http://stackoverflow.com/questions/2649544/unicode-identifiers-in-python

Can you paste the code you are trying to execute so we can see what you are trying to do?

Jason
moorepants.info
+01 530-601-9791

On Sun, Apr 3, 2016 at 6:05 PM, Diego Mundo <diego...@gmail.com> wrote:

Trying to use 'γ' as a custom variable in parse_expr with python 2. ...Is this at all possible? I was able to do it with python 3, but my particular project requires python 2.

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[Aaron Meurer]

Not without changing how parse_expr works. It uses the syntax of the
Python it runs in, and Python 2 doesn't allow non-ASCII identifiers.
You can make it work with Symbol(u'γ') (i.e., manually wrap it with
Symbol). Or set

Gamma = Symbol(u'γ')

and use Gamma in the code. You can also just use "gamma", but you'll
have to remove it from the default locals ('gamma' defaults to the
gamma function).

Aaron Meurer

> https://groups.google.com/d/msgid/sympy/CAP7f1AjMuOb0iwy6KgxSH%2BnOBsUOZ0WqHxmC3xmNDz5J1-txoQ%40mail.gmail.com.