TypeError on running example from Docs.

[bhaumik-tripathi]

I have successfully installed fabric matching all the dependencies, then headed to "Write you first widget section". Running the first example which I named first.py is giving the following error?

Traceback (most recent call last):
  File "/home/username/custom-widgets/./first.py", line 1, in <module>
    import fabric # importing the base pacakge
    ^^^^^^^^^^^^^
  File "/home/username/custom-widgets/venv/lib64/python3.13/site-packages/fabric/__init__.py", line 1, in <module>
    from fabric.core.service import Service, Signal, Property, Builder
  File "/home/username/custom-widgets/venv/lib64/python3.13/site-packages/fabric/core/__init__.py", line 2, in <module>
    from .application import Application
  File "/home/username/custom-widgets/venv/lib64/python3.13/site-packages/fabric/core/application.py", line 196, in <module>
    class Application(Gtk.Application, Service):
    ...<267 lines>...
            )
  File "/home/username/custom-widgets/venv/lib64/python3.13/site-packages/fabric/core/application.py", line 200, in Application
    @Property(list[Gtk.Window])
     ~~~~~~~~^^^^^^^^^^^^^^^^^^
  File "/home/username/custom-widgets/venv/lib64/python3.13/site-packages/fabric/core/service.py", line 121, in __init__
    type=type if issubclass(type, (bool, int, float, str)) else object,
                 ~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: issubclass() arg 1 must be a class

Few things to note here is that I am using fedora 41 with hyprland. Since the instructions were a bit unclear so I created this widget in the same directory in which I installed fabric. I have the following questions:-

1. First and foremost, how can I fix this error?
2. Do I need to create the widgets in future in the same directory in which I installed fabric?
   Any help would be appreciated, please pardon if any of above is too basic, my knowledge of python is bare bones.

[its-darsh]

For now. My reply on Your econd question:

Do I need to create the widgets in future in the same directory in which I installed fabric?
Any help would be appreciated, please pardon if any of above is too basic, my knowledge of python is bare bones.

No, Fabric is a just a Python module. just like all others. You can create a file wherever you want and it is going to run as long as Fabric is installed in the environment which You're going launch Fabric from (i.e. python /path/to/config.py)

[its-darsh]

For the first question. I might need more information on how exactly have You installed Fabric (or how to reproduce error)