Z3 solver installed but I can't import anything

Question

I've installed z3-solver package from PyPi in my Python3 environment using Anaconda Prompt ( pip install z3-solver ) and that's it.
The package appears in the site-packages/ directory ( the package has _init__.py and all essential files including z3.py ). However, when I tried running this example from Jupyter Notebook, it returns the following message: NameError : name 'Int' is not defined.
I've only used Anaconda for a short time so I'm not sure how installation works. It's really odd because the 'pip install' command works fine most of the times. Did I do something wrong or this package requires more configuration?

Answer 1

You can run conda install pip and then run the pip install z3-solver .

Answer 2

Sorry for the late update.

I've managed to solve the problem based on this guide .

To permanently change the sys.path variable in Anaconda, I created a .PTH file which contains the path to z3 and put it in site-packages directory.

You might need to copy the libz3.dll file to the right directory in order for it to work. Running pip install z3-solver does download the required files and put them in site-packages but I can't import z3 from anywhere.

Maybe you also need to fix the path after using pip so Anaconda can recognize it. I did everything manually so I'm not sure why pip doesn't work in this case.

That's all I did to install z3 on my Windows . Hope it helps !

Answer 3

you have to write:

from z3 import *

which solved my NameError: name 'Solver' is not defined Exception

prerequisites:

pip install z3
pip install z3-solver

code example

from z3 import *
 
def main(): 
    
    s = Solver()
    x = Int('x')
    y = Int('y')
    s.add(x < 10)