AttributeError: module 'collections' has no attribute 'Mapping'

[karapapas]

Python Python 3.10.9
Jupyter Notebook 6.5.2

!pip install experta
Requirement already satisfied: experta in c:\programdata\anaconda3\lib\site-packages (1.9.4)
Requirement already satisfied: frozendict==1.2 in c:\programdata\anaconda3\lib\site-packages (from experta) (1.2)
Requirement already satisfied: schema==0.6.7 in c:\programdata\anaconda3\lib\site-packages (from experta) (0.6.7)

from experta import *

AttributeError Traceback (most recent call last)
Cell In[9], line 1
----> 1 from experta import *

File C:\ProgramData\anaconda3\lib\site-packages\experta_init_.py:5
3 try:
4 from .conditionalelement import AND, OR, NOT, TEST, EXISTS, FORALL
----> 5 from .engine import KnowledgeEngine
6 from .fact import Fact, InitialFact, Field
7 from .fieldconstraint import L, W, P

File C:\ProgramData\anaconda3\lib\site-packages\experta\engine.py:13
10 from experta import abstract
12 from experta.agenda import Agenda
---> 13 from experta.fact import InitialFact
14 from experta.factlist import FactList
15 from experta.rule import Rule

File C:\ProgramData\anaconda3\lib\site-packages\experta\fact.py:9
6 from schema import Schema
8 from experta.pattern import Bindable
----> 9 from experta.utils import freeze, unfreeze
10 from experta.conditionalelement import OperableCE
11 from experta.conditionalelement import ConditionalElement

File C:\ProgramData\anaconda3\lib\site-packages\experta\utils.py:4
1 from functools import singledispatch
2 import collections.abc
----> 4 from frozendict import frozendict
6 from .fieldconstraint import P
9 class frozenlist(tuple):

File C:\ProgramData\anaconda3\lib\site-packages\frozendict_init_.py:16
10 OrderedDict = NotImplemented
13 iteritems = getattr(dict, 'iteritems', dict.items) # py2-3 compatibility
---> 16 class frozendict(collections.Mapping):
17 """
18 An immutable wrapper around dictionaries that implements the complete :py:class:collections.Mapping
19 interface. It can be used as a drop-in replacement for dictionaries where immutability is desired.
20 """
22 dict_cls = dict

AttributeError: module 'collections' has no attribute 'Mapping'

---

After deleting the site-packages
!pip install experta
Collecting experta
Using cached experta-1.9.4-py3-none-any.whl (35 kB)
Requirement already satisfied: frozendict==1.2 in c:\programdata\anaconda3\lib\site-packages (from experta) (1.2)
Requirement already satisfied: schema==0.6.7 in c:\programdata\anaconda3\lib\site-packages (from experta) (0.6.7)
Installing collected packages: experta
Successfully installed experta-1.9.4

from experta import *
...
AttributeError: module 'collections' has no attribute 'Mapping'

[horaciogacevedo]

This is a problem with python 3.10 upwards. If you create a conda environment with python 3.9 it works in ubuntu.

[mohamedamara1]

This is a problem with python 3.10 upwards. If you create a conda environment with python 3.9 it works in ubuntu.

Any other fix for this? I tested with 3.9.18 on python venv and I got the same error

[mohamedamara1]

Using

This is a problem with python 3.10 upwards. If you create a conda environment with python 3.9 it works in ubuntu.

Any other fix for this? I tested with 3.9.18 on python venv and I got the same error

Installing python 3.8.18 worked for me

[tomordonez]

Tested in Python 3.12.3.
It looks like collections.Mapping was moved to collections.abc.Mapping. The file frozendict/__init__.py has to be changed to correct this. The class is defined like this:

class frozendict(collections.Mapping)

Change to

class frozendict(collections.abc.Mapping)