ModuleNotFoundError: No module named 'tkcalendar', Thonny, Windows 10

[Edward_]

I'm trying to learn to use the tkCalendar but getting a "ModuleNotFoundError: No module named 'tkcalendar'".
I have installed it properly I believe, using pip, but when I try to verify it entering >tkcalendar in the command prompt, the response is:

'tkcalendar' is not recognized as an internal or external command,
operable program or batch file.

I'm reading a lot of vague solutions for the environmental variable addition which doesn't match the Environment Variables windows I see in Win 10 Pro.
Everything else imaginable I have done with python and tkinter has worked perfectly without hesitation, until this.

Could the Environment Variable be the problem for this one module?

my test code is:

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import tkinter as tk import tkcalendar from tkcalendar import Calendar   root = tk.Tk() cal = Calendar(root, selectmode="day", date_pattern="yyyy-mm-dd") cal.pack(pady=20)   def get_date():     selected_date = cal.get_date()     print("Selected Date:", selected_date)   button = tk.Button(root, text="Get Date", command=get_date) button.pack(pady=10)   root.mainloop()

[deanhystad]

Does it show up if you type pip list in the shell? Are you using a virtual environment?

[Edward_]

Not using a virtual environment.

pip list result:

C:\Users\Owner>pip list
Package Version
---------- -------
babel 2.17.0
pip 24.3.1
tkcalendar 1.6.1

[Gribouillis]

Depending on how you installed Thonny, it may be using its integrated Python interpreter. Try to install tkcalendar from Thonny's Tools menu.

[Edward_]

Depending on how you installed Thonny, it may be using its integrated Python interpreter. Try to install tkcalendar from Thonny's Tools menu.

Thanks Gribouillis!
That fixed it.