[Sugar-devel] no module named sugar.activity.activity

[Abhishek Tanwar]

I am trying to port https://github.com/sugarlabs/arithmetic to GTk3 but
when i run the activity to understand the working(with GTK) it throws an
error "no module named sugar.activity.activity".I searched google for any
potential solutions but could not find anything .

Traceback (most recent call last):
  File "/usr/bin/sugar-activity", line 219, in <module>
    main()
  File "/usr/bin/sugar-activity", line 214, in main
    instance = create_activity_instance(activity_constructor,
activity_handle)
  File "/usr/bin/sugar-activity", line 48, in create_activity_instance
    activity = constructor(handle)
  File
"/usr/share/sugar/activities/compress-activity.activity/Compress.py", line
42, in _init_
    canvas = PyApp()
  File
"/usr/share/sugar/activities/compress-activity.activity/CompressCanvas3.py",
line 504, in _init_
    if Gdk.Screen.width() >= 1200:
NameError: global name 'Gdk' is not defined
Exited with status 1, pid 1692 data (<open file '<fdopen>', mode 'w' at
0x7f0fd82a3ae0>, 'f5b6d864dcbea56c6345d8d0394716abe77d46e7')


I setup my development environment by following
https://github.com/sugarlabs/sugar/blob/master/docs/ubuntu.md and I am
working on ubuntu 18.04.
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