Execute .py file -> not recognizing Symbol, when file isn't inside of sympy dir

[Michał Pawłowski]

Hi.

I have such problem.

I've created py file:

#!/usr/bin/python3

from sympy import *

x = Symbol('x')

print(expand(sin(x)*(x-1)*(x+1)))

When it is inside of SymPy lib dir, it returns correct result in console.

But, when I put it not inside the lib dir, it tells me, that:

NameError: name 'Symbol' is not defined

How can I fix it, to be able to execute this file from anywhere in my directory tree?

Thanks

Mike

[Oscar Benjamin]

That should work fine. Have you actually installed sympy or have you
just downloaded the code?

By any chance have you created a file somewhere called "sympy.py"
because that would be picked up by "import sympy".

--
Oscar

[Michał Pawłowski]

Thanks.

I used git clone ... thats all 

[Oscar Benjamin]

Do you particularly want to use the master version of sympy from git?

It's usually better to use the latest release (currently 1.7.1) unless
you are planning to work on making changes to sympy itself.

You can install the latest release by running e.g "pip install sympy"
(or "conda install sympy" if you are using Anaconda).

If you do want to install the master version of sympy then you need to
run "python setup.py install" (after "git clone").

Oscar

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[Michał Pawłowski]

Thank you so much, it works great now! :)

I haven't installed it. I have newest version I used to used git pull ..

Thank U

Mike

środa, 10 lutego 2021 o 22:14:07 UTC+1 Oscar napisał(a):

Do you particularly want to use the master version of sympy from git?

It's usually better to use the latest release (currently 1.7.1) unless
you are planning to work on making changes to sympy itself.

You can install the latest release by running e.g "pip install sympy"
(or "conda install sympy" if you are using Anaconda).

If you do want to install the master version of sympy then you need to
run "python setup.py install" (after "git clone").

Oscar