I don't get the processes behind "import" and "from xyz import". When I code:
from tkinter import *
then I import, I thought, the whole tkinter names into my namespace. But I can't use neither
tkinter.messagebox.showinfo("title", "someinfo")
nor
messagebox.showinfo(...)
To use that, I have to
from tkinter import messagebox
to access it. the same with
import tkinter as tk
... there is no:
tk.messagebox.showinfo...
@fatrat from … import * doesn’t import everything. The module’s author can decide what’s included.
But note that it’s generally considered bad practice to use from … import * as it dumps lots of stuff into the main namespace. It is safer to keep namespaces separate
"import * doesn’t import everything. The module’s author can decide what’s included."
Thank you! I've stumbled into this several times and did not realize what was happening.
@JHB17 @fatrat A good way to explore this is to try it out. Create a script, let’s call it test.py and include the following variables:
some_variable = 10_another_variable = 20__yet_another_one = 30
Then try from test import * in the REPL/Console. You’ll see that only some_variable is public so only that variable is imported.
But now, add the following at the top of the script:
__all__ = ["_another_variable", "__yet_another_one"]
and try from test import * in a new REPL/Console (not the same one as before, as the old version is already imported there)
@s_gruppetta @JHB17 great, thx again, tried it.