intro/tomo -> error from scipy.sparse when importing pyxu.abc ("TypeError: Bound must be a type. ")

[stisa]

Hi, I am following along the basic tomography tutorial ( https://pyxu-org.github.io/intro/tomo.html ) but I get an error when importing pyxu:

TypeError: Bound must be a type. Got <module 'scipy.sparse' from 'c:\\Users\\silvio.tisato\\AppData\\Local\\miniconda3\\envs\\intel\\lib\.

I installed pyxu by pip install pyxu[complete-cpu] on windows 10, python 3.10, numpy 1.26.4, scipy 1.14.1, pyxu 2.0 in a conda env named intel.
Any idea what is going wrong? Thanks!

Traceback:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
Cell In[5], [line 1](vscode-notebook-cell:?execution_count=5&line=1)
----> [1](vscode-notebook-cell:?execution_count=5&line=1) import pyxu.abc as pxa
      [2](vscode-notebook-cell:?execution_count=5&line=2) import pyxu.operator as pxo
      [3](vscode-notebook-cell:?execution_count=5&line=3) from pyxu.operator.interop import from_source

File [c:\Users\silvio.tisato\AppData\Local\miniconda3\envs\intel\lib\site-packages\pyxu\abc\__init__.py:1](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/__init__.py:1)
----> [1](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/__init__.py:1) from pyxu.abc.operator import *
      [2](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/__init__.py:2) from pyxu.abc.solver import *

File [c:\Users\silvio.tisato\AppData\Local\miniconda3\envs\intel\lib\site-packages\pyxu\abc\operator.py:14](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/operator.py:14)
     [11](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/operator.py:11) import scipy.sparse.linalg as spsl
     [13](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/operator.py:13) import pyxu.info.deps as pxd
---> [14](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/operator.py:14) import pyxu.info.ptype as pxt
     [15](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/operator.py:15) import pyxu.info.warning as pxw
     [16](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/abc/operator.py:16) import pyxu.runtime as pxrt

File [c:\Users\silvio.tisato\AppData\Local\miniconda3\envs\intel\lib\site-packages\pyxu\info\ptype.py:32](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/info/ptype.py:32)
     [30](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/info/ptype.py:30) if len(ssm := pxd.supported_sparse_modules()) == 1:
     [31](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/info/ptype.py:31)     print(tuple(ssm)[0])
---> [32](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/info/ptype.py:32)     SparseModule = typ.TypeVar("SparseModule", bound=tuple(ssm)[0])
     [33](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/info/ptype.py:33) else:
     [34](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/site-packages/pyxu/info/ptype.py:34)     SparseModule = typ.TypeVar("SparseModule", *[typ.Literal[_] for _ in ssm])

File [c:\Users\silvio.tisato\AppData\Local\miniconda3\envs\intel\lib\typing.py:804](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:804), in TypeVar.__init__(self, name, bound, covariant, contravariant, *constraints)
    [801](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:801) def __init__(self, name, *constraints, bound=None,
    [802](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:802)              covariant=False, contravariant=False):
    [803](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:803)     self.__name__ = name
--> [804](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:804)     super().__init__(bound, covariant, contravariant)
    [805](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:805)     if constraints and bound is not None:
    [806](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:806)         raise TypeError("Constraints cannot be combined with bound=...")

File [c:\Users\silvio.tisato\AppData\Local\miniconda3\envs\intel\lib\typing.py:731](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:731), in _TypeVarLike.__init__(self, bound, covariant, contravariant)
    [729](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:729) self.__contravariant__ = bool(contravariant)
    [730](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:730) if bound:
--> [731](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:731)     self.__bound__ = _type_check(bound, "Bound must be a type.")
    [732](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:732) else:
    [733](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:733)     self.__bound__ = None

File [c:\Users\silvio.tisato\AppData\Local\miniconda3\envs\intel\lib\typing.py:176](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:176), in _type_check(arg, msg, is_argument, module, allow_special_forms)
    [174](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:174)     return arg
    [175](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:175) if not callable(arg):
--> [176](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:176)     raise TypeError(f"{msg} Got {arg!r:.100}.")
    [177](file:///C:/Users/silvio.tisato/AppData/Local/miniconda3/envs/intel/lib/typing.py:177) return arg
</details>

[SepandKashani]

Hi @stisa ,

After trying to run the notebook, it seems we forgot to update it to work with Pyxu 2.0: the from_source() function called further down has changed signature for example between v1 and v2. A few other things seem to be problematic too, which may explain your error.

I have my hands full at the moment with a deadline, but will fix this end of next week.