(no subject)

Vasilis Vlachoudis <[email protected]> Wed, 4 Mar 2020 15:33:07 +0000
Newsgroups	gmane.comp.python.tkinter
Message-ID	<[email protected]>
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I had the impression that tkinter is single threaded, but it seems that the=
 breakpoint() or input()
does not block the mainloop to continue
If one clicks the second button that waits for an input or enter in the bre=
akpoint()
the mainloop is still responsive while it waits for an input. So one can cl=
ick any button
the first to display the message or the second that will abort with a messa=
ge that readline cannot
be re-entered?

Why is that? What other commands can trigger such a behavior?

import tkinter as tk

def boinc():
for i in range(10):
print("boinc...")

def debug():
#breakpoint()
print("Breakpoint")
print("Input: ",end=3D"")
s =3D input()
print("Entered:", s)

#--------------------------------------------------------------------------=
-----
if __name__ =3D=3D "__main__":
root =3D tk.Tk()
b =3D tk.Button(root, text=3D"Boinc", command=3Dboinc)
b.pack()
b =3D tk.Button(root, text=3D"Debug", command=3Ddebug)
b.pack()
root.mainloop()

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</head>
<body fpstyle=3D"1" ocsi=3D"0">
<div style=3D"direction: ltr;font-family: Tahoma;color: #000000;font-size: =
10pt;">I had the impression that tkinter is single threaded, but it seems t=
hat the breakpoint() or input()
<div>does not block the mainloop to continue<br>
<div>If one clicks the second button that waits for an input or enter in th=
e breakpoint()</div>
<div>the mainloop is still responsive while it waits for an input. So one c=
an click any button</div>
<div>the first to display the message or the second that will abort with a =
message that readline cannot</div>
<div>be re-entered?</div>
<div><br>
</div>
<div>Why is that? What other commands can trigger such a behavior?</div>
<div><br>
</div>
<div>
<div><span style=3D"font-size: 13.3333px;">import tkinter as tk</span></div=
>
<div><span style=3D"font-size: 13.3333px;"><br>
</span></div>
<div><span style=3D"font-size: 13.3333px;">def boinc():</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>for i in range(10):</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>print(&quot;boinc...&quot;)</span></div>
<div><span style=3D"font-size: 13.3333px;"><br>
</span></div>
<div><span style=3D"font-size: 13.3333px;">def debug():</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>#breakpoint()</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>print(&quot;Breakpoint&quot;)</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>print(&quot;Input: &quot;,end=3D&quot;&quot;)</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>s =3D input()</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>print(&quot;Entered:&quot;, s)</span></div>
<div><span style=3D"font-size: 13.3333px;"><br>
</span></div>
<div><span style=3D"font-size: 13.3333px;">#-------------------------------=
------------------------------------------------</span></div>
<div><span style=3D"font-size: 13.3333px;">if __name__ =3D=3D &quot;__main_=
_&quot;:</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>root =3D tk.Tk()</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>b =3D tk.Button(root, text=3D&quot;Boinc&quot;, command=3Dboinc)</sp=
an></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>b.pack()</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>b =3D tk.Button(root, text=3D&quot;Debug&quot;, command=3Ddebug)</sp=
an></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>b.pack()</span></div>
<div><span style=3D"font-size: 13.3333px;"><span style=3D"white-space:pre">=
</span>root.mainloop()</span></div>
</div>
</div>
</div>
</body>
</html>

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