Hangs after maybe between 4 and 50 screen rewrites. sometimes CTRL C under Ubuntu starts it up again. Click go rewrites al the fonts the thing can find in a few windows.... Repeated.

TKinter has a cult following. I don''t really expect others to fix my problems, but you know, es since its a cult thing to love TCL ( or something .... ) Here is is.

Same on two different computers in Python 3.6 and 3.8

Plus I suppose you get to see for sure all your finest fonts as rendered in a real TK thing, not that this changes the worlds so much.

Thanks for the advice so far...
Regards,
Dan Kolis

# Code version 18Jan2023 19:48 EST Dan Kolis
# Click 'go' on main page. when run over and over after a while it freezes

import tkinter as tk
from tkinter import ttk
from tkinter import font as luFont

# Empty object maker ( M T ) ... get it say it !
class MT():
pass

# Module level variables
mod = MT()
mod.itsPlaces = MT()
mod.itsPlaces = []

# Apply XY Size to things like windows, variable place 31Jul22
def apply_Width_Height_Position( toThis, aWidth, aHeight, *argsPlace ):

# Width and height is expected

# Argument overflow is quite variable size is it its usual hint for me
aLen = len( argsPlace )

# Sometimes, just width and height are given ( not that + position )
wAndH = str( int( aWidth ) ) +'x' + str( int( aHeight ) ) # Size has a funny text line interface
toThis.geometry( wAndH ) # Apply

# Sometimes position too
if aLen == 2:
eP = "+" + str( argsPlace[ 0 ] ) + "+" + str( argsPlace[ 1 ] )
param4 = wAndH + eP # Combine size and position
toThis.geometry( param4 ) # Apply

jjjjjj = 560

# Create local toplevel to whoever calls me 11Dec22 bc-endive
def make_Tk_Window( sReason, *attribKc ):

# Top level window maker and rememberer
# Kc = 'Kind code'

aCode = "na" # Not available
if attribKc:
aCode = attribKc [ 0 ] # Better code then 'na'

# Make window
ansWin = tk.Toplevel()

# Keep track of this creation step
newEntry = {}
newEntry[ 'tkaddress' ] = ansWin # Real TK window accessor
newEntry[ 'ideanamed' ] = sReason # Casual description
newEntry[ 'kindcode' ] = aCode # So can be worked with together

mod.itsPlaces.append( newEntry )

return ansWin

# Idle time rewrite
def justRedisplayNow( wThings, *argsR ):

# Redisplay a named tj thing
# Dont use this frivolously, if it's needed its here you have to study it

wThings.update()

# Look at fonts possible 6Oct22
def showAllFonts():

# Show fonts possible

mod.lines_In_Window = 30; mod.window_Seq_Number = 1

# What we want to see
mod.seeFonts = list( luFont.families() )
mod.seeFonts.sort() # Alpha order is nice

# Fill windows as a look at me report
try:
populateW()
except:
tttttt = 456

rrrrrr = 245

# Show fonts regarding avoiding BAD ones that crash, etc size limits in buffers too 19Dec22
def populateW():

# Put in the fonts

aLen = len( mod.seeFonts ) # Fun to know, debug really
last_considered_name = "gghfjhljfl" # Don't show doubles

# Loop through all fonts the system named
thisPassMakeWindow = True; a_Line_Count = 0; list_Number = 0
for item in mod.seeFonts:

# Multiple windows ( Python has funny ideas on this, ok like this )
if thisPassMakeWindow:
winTk_Now = winMakerFontsW(); thisPassMakeWindow = False; a_Line_Count = 0 # We gots one now

if a_Line_Count < mod.lines_In_Window: # Will a window we made
list_Number += 1 # Counts
aN = str( list_Number ) + " "; name_In_lower = item.lower()

# Various reasons to not render this one
isOk = True
if name_In_lower == last_considered_name:
isOk = False
a_Bad_Thing = name_In_lower.find( 'emoji' ) > -1
if a_Bad_Thing:
isOk = False
a_Bad_Thing = item.find( 'Noto Sans Mono CJK' ) > -1
if a_Bad_Thing:
isOk = False

# Good good
if isOk:
label = "listlabel" + str( list_Number )
label = tk.Label( winTk_Now, text=aN + item, font=( item, 18 ), anchor='w' ).pack()
a_Line_Count += 1
last_considered_name = name_In_lower
else:
justRedisplayNow( winTk_Now )
thisPassMakeWindow = True; mod.window_Seq_Number += 1 # New window next time

# Done
a_Msg = "on this machine"

# Look at fonts possible 6Oct22
def showAllFonts():

# Show fonts possible

mod.lines_In_Window = 30; mod.window_Seq_Number = 1

# What we want to see
mod.seeFonts = list( luFont.families() )
mod.seeFonts.sort() # Alpha order is nice

# Fill windows as a look at me report
try:
populateW()
except:
tttttt = 456

rrrrrr = 245

# Just window shape aka size
def applyWidthHeight( toThis, aWidth, aHeight ):

# TK window size no change in code anyway, to placement

# Op sys like thing likes this x that numbers
wAndH = str( int( aWidth ) ) +'x' + str( int( aHeight ) ) # Size
toThis.geometry( wAndH ) # Apply
tttttt = 385

# Window making
def winMakerFontsW():

# Window with scroll bars, etc canvassy, ready to fill up

# The real window gets created
mInf = ' ' + str( mod.window_Seq_Number )
wsFr = make_Tk_Window( 'Font peek' + mInf, 'fontpeek' );
wsFr.title( 'Fonts' + mInf )
start_Hor = 50; Kh = 110; start_Ver = 35; Kv = 40
moved_Some_H = start_Hor + ( mod.window_Seq_Number * ( Kh - 1 ) )
moved_Some_V = start_Ver + ( mod.window_Seq_Number * ( Kv - 1 ) )
apply_Width_Height_Position( wsFr, 480, 500, moved_Some_H, moved_Some_V )

# Canvas is the form pretty much
my_Canvas = tk.Canvas( wsFr, borderwidth=0 )
myFrm = tk.Frame( my_Canvas ) # Now the 'do it on me' thing

# Vertical scroll bars go onto form
vsb = tk.Scrollbar( wsFr, orient="vertical", command=my_Canvas.yview )
my_Canvas.configure( yscrollcommand=vsb.set )

# Assemble via relations of pieces
vsb.pack( side="right", fill="y" )
my_Canvas.pack( side="left", fill="both", expand=True )
my_Canvas.create_window( (4, 4 ), window=myFrm, anchor="nw" )

return myFrm

def callIt():

# A click do it

showAllFonts()

# This is main
root = tk.Tk()

applyWidthHeight( root, 300, 300 )

b1 = tk.Button( root, text='go', command=callIt )
b1.grid( row=0, column=0 )

root.mainloop()

On 1/18/23 18:01, Dan Kolis wrote:
> Hangs after maybe between 4 and 50 screen rewrites. sometimes CTRL C under Ubuntu starts it up again. Click go rewrites al the fonts the thing can find in a few windows.... Repeated.
>

Not sure what you mean by "screen rewrites."

I ran your test program here and it generates 25 windows on my machine,
and I can click "run" at least half a dozen times. I tried closing the
font windows before clicking run again, and also just leaving the
windows up and generating many more windows. 300 windows. No hangs here
at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.

On 1/18/2023 8:56 PM, Michael Torrie wrote:
> On 1/18/23 18:01, Dan Kolis wrote:
>> Hangs after maybe between 4 and 50 screen rewrites. sometimes CTRL C under Ubuntu starts it up again. Click go rewrites al the fonts the thing can find in a few windows.... Repeated.
>>
>
> Not sure what you mean by "screen rewrites."
>
> I ran your test program here and it generates 25 windows on my machine,
> and I can click "run" at least half a dozen times. I tried closing the
> font windows before clicking run again, and also just leaving the
> windows up and generating many more windows. 300 windows. No hangs here
> at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.

It could be using up some system resource. tk could have some memory or
resource leak, possibly specific to the OP's machine. Try looking at
system memory with the system monitor as the program goes through its
paces. Maybe you will notice something suspicious.

On 1/18/2023 11:46 PM, Thomas Passin wrote:
> On 1/18/2023 8:56 PM, Michael Torrie wrote:
>> On 1/18/23 18:01, Dan Kolis wrote:
>>> Hangs after maybe between 4 and 50 screen rewrites. sometimes CTRL C
>>> under Ubuntu starts it up again. Click go rewrites al the fonts the
>>> thing can find in a few windows.... Repeated.
>>>
>>
>> Not sure what you mean by "screen rewrites."
>>
>> I ran your test program here and it generates 25 windows on my machine,
>> and I can click "run" at least half a dozen times. I tried closing the
>> font windows before clicking run again, and also just leaving the
>> windows up and generating many more windows.  300 windows. No hangs here
>> at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.
>
> It could be using up some system resource.  tk could have some memory or
> resource leak, possibly specific to the OP's machine.  Try looking at
> system memory with the system monitor as the program goes through its
> paces.  Maybe you will notice something suspicious.
>

Also reduce the number of windows that get opened to a small number. If
there are no freezes, increase the number little by little. This may
give you some bounds on what's going on, or at least let your ultimate
program work by keeping the resource use under control.

Works fine on my work machine. (Ubuntu 20.04 / 32 G / 32 CPUS). Scalene (https://github.com/plasma-umass/scalene) shows it using 9 MB of memory.

From: Python-list <python-list-bounces+gweatherby=uchc.edu@python.org> on behalf of Michael Torrie <torriem@gmail.com>
Date: Wednesday, January 18, 2023 at 8:58 PM
To: python-list@python.org <python-list@python.org>
Subject: Re: A natural magnet for the craziest TKinter lovers out there
*** Attention: This is an external email. Use caution responding, opening attachments or clicking on links. ***

On 1/18/23 18:01, Dan Kolis wrote:
> Hangs after maybe between 4 and 50 screen rewrites. sometimes CTRL C under Ubuntu starts it up again. Click go rewrites al the fonts the thing can find in a few windows.... Repeated.
>

Not sure what you mean by "screen rewrites."

I ran your test program here and it generates 25 windows on my machine,
and I can click "run" at least half a dozen times. I tried closing the
font windows before clicking run again, and also just leaving the
windows up and generating many more windows. 300 windows. No hangs here
at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.

--
https://urldefense.com/v3/__https://mail.python.org/mailman/listinfo/python-list__;!!Cn_UX_p3!iGQaGdd9t2QPVQJDhyDTQmXgCwx4YG7m8jFbRd11dF1BweJHCd0wC4UyZUfQGQjqxeulMYagnDqInfA81A$<https://urldefense.com/v3/__https:/mail.python.org/mailman/listinfo/python-list__;!!Cn_UX_p3!iGQaGdd9t2QPVQJDhyDTQmXgCwx4YG7m8jFbRd11dF1BweJHCd0wC4UyZUfQGQjqxeulMYagnDqInfA81A$>

Works fine through 10 "go" button presses on my Windows 10 machine. You
might want to run pylint and pyflakes on it

On 1/19/2023 7:34 AM, Weatherby,Gerard wrote:
> Works fine on my work machine. (Ubuntu 20.04 / 32 G / 32 CPUS). Scalene (https://github.com/plasma-umass/scalene) shows it using 9 MB of memory.
>
> From: Python-list <python-list-bounces+gweatherby=uchc.edu@python.org> on behalf of Michael Torrie <torriem@gmail.com>
> Date: Wednesday, January 18, 2023 at 8:58 PM
> To: python-list@python.org <python-list@python.org>
> Subject: Re: A natural magnet for the craziest TKinter lovers out there
> *** Attention: This is an external email. Use caution responding, opening attachments or clicking on links. ***
>
> On 1/18/23 18:01, Dan Kolis wrote:
>> Hangs after maybe between 4 and 50 screen rewrites. sometimes CTRL C under Ubuntu starts it up again. Click go rewrites al the fonts the thing can find in a few windows.... Repeated.
>>
>
> Not sure what you mean by "screen rewrites."
>
> I ran your test program here and it generates 25 windows on my machine,
> and I can click "run" at least half a dozen times. I tried closing the
> font windows before clicking run again, and also just leaving the
> windows up and generating many more windows. 300 windows. No hangs here
> at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.
>
> --
> https://urldefense.com/v3/__https://mail.python.org/mailman/listinfo/python-list__;!!Cn_UX_p3!iGQaGdd9t2QPVQJDhyDTQmXgCwx4YG7m8jFbRd11dF1BweJHCd0wC4UyZUfQGQjqxeulMYagnDqInfA81A$<https://urldefense.com/v3/__https:/mail.python.org/mailman/listinfo/python-list__;!!Cn_UX_p3!iGQaGdd9t2QPVQJDhyDTQmXgCwx4YG7m8jFbRd11dF1BweJHCd0wC4UyZUfQGQjqxeulMYagnDqInfA81A$>

Hello !

> Works fine on my work machine. (Ubuntu 20.04 / 32 G / 32 CPUS). Scalene (https://github.com/plasma-umass/scalene) shows it using 9 MB of memory.

> I ran your test program here and it generates 25 windows on my machine,
> and I can click "run" at least half a dozen times. I tried closing the
> font windows before clicking run again, and also just leaving the
> windows up and generating many more windows. 300 windows. No hangs here
> at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.

Thanks a lot These reports are very helpful !

I seemed to have 'fixed it' by changing one line, really. I used:

# Do each thing
...for aWs in workWsL:
.....aWs.update()

TO:
# Do each thing
...for aWs in workWsL:
.....aWs.update_idletasks()

Dan says:
Thanks a lot ! This helps me visualise this is managed as a problem in a technical sense. I mean, there is always a requirement for real integration testing of all sorts for an attempt to release a program on a larger scale.

Now I know it works without stopping on 4 computers. Better then yesterday hugely.

Thank you.

Regs
Daniel B. Kolis

my ref: nafl, 19 Jan 2023, https://groups.google.com/g/comp.lang.python/c/FNlXg0Od39o/m/9stiUtLSAQAJ

Works through 20 presses of the "go" button on a Linux Mint VM. Because
of limited RAM allocated for the VM, after some iterations the program
slowed down because the VM had to start using swap memory. But there
did not seem to be any glitches or failures.

Python 3.9.5
Linux Mint 20 Ulyana /Cinnamon 3.07 GB
Linux kernel 5.4.0-137-generic
tk: 0.1.0

On 1/19/2023 10:06 AM, Thomas Passin wrote:
> Works fine through 10 "go" button presses on my Windows 10 machine.  You
> might want to run pylint and pyflakes on it
>
> On 1/19/2023 7:34 AM, Weatherby,Gerard wrote:
>> Works fine on my work machine. (Ubuntu 20.04 / 32 G / 32 CPUS).
>> Scalene (https://github.com/plasma-umass/scalene) shows it using 9 MB
>> of memory.
>>
>> From: Python-list <python-list-bounces+gweatherby=uchc.edu@python.org>
>> on behalf of Michael Torrie <torriem@gmail.com>
>> Date: Wednesday, January 18, 2023 at 8:58 PM
>> To: python-list@python.org <python-list@python.org>
>> Subject: Re: A natural magnet for the craziest TKinter lovers out there
>> *** Attention: This is an external email. Use caution responding,
>> opening attachments or clicking on links. ***
>>
>> On 1/18/23 18:01, Dan Kolis wrote:
>>> Hangs after maybe between 4 and 50 screen rewrites. sometimes CTRL C
>>> under Ubuntu starts it up again. Click go rewrites al the fonts the
>>> thing can find in a few windows.... Repeated.
>>>
>>
>> Not sure what you mean by "screen rewrites."
>>
>> I ran your test program here and it generates 25 windows on my machine,
>> and I can click "run" at least half a dozen times. I tried closing the
>> font windows before clicking run again, and also just leaving the
>> windows up and generating many more windows.  300 windows. No hangs here
>> at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.
>>
>> --
>> https://urldefense.com/v3/__https://mail.python.org/mailman/listinfo/python-list__;!!Cn_UX_p3!iGQaGdd9t2QPVQJDhyDTQmXgCwx4YG7m8jFbRd11dF1BweJHCd0wC4UyZUfQGQjqxeulMYagnDqInfA81A$<https://urldefense.com/v3/__https:/mail.python.org/mailman/listinfo/python-list__;!!Cn_UX_p3!iGQaGdd9t2QPVQJDhyDTQmXgCwx4YG7m8jFbRd11dF1BweJHCd0wC4UyZUfQGQjqxeulMYagnDqInfA81A$>
>

On 1/19/2023 10:21 AM, Dan Kolis wrote:
> Hello !
>
>> Works fine on my work machine. (Ubuntu 20.04 / 32 G / 32 CPUS). Scalene (https://github.com/plasma-umass/scalene) shows it using 9 MB of memory.
>
>> I ran your test program here and it generates 25 windows on my machine,
>> and I can click "run" at least half a dozen times. I tried closing the
>> font windows before clicking run again, and also just leaving the
>> windows up and generating many more windows. 300 windows. No hangs here
>> at all. Fedora 35 with Mate Desktop on X11 with compositing enabled.
>
>
> Thanks a lot These reports are very helpful !
>
> I seemed to have 'fixed it' by changing one line, really. I used:
>
> # Do each thing
> ..for aWs in workWsL:
> ....aWs.update()
>
>
> TO:
> # Do each thing
> ..for aWs in workWsL:
> ....aWs.update_idletasks()

I was going to suggest update_idletasks(), but I forgot to scan your
code to see it it was already being done.

> Dan says:
> Thanks a lot ! This helps me visualise this is managed as a problem in a technical sense. I mean, there is always a requirement for real integration testing of all sorts for an attempt to release a program on a larger scale.
>
> Now I know it works without stopping on 4 computers. Better then yesterday hugely.
>
> Thank you.
>
> Regs
> Daniel B. Kolis
>
> my ref: nafl, 19 Jan 2023, https://groups.google.com/g/comp.lang.python/c/FNlXg0Od39o/m/9stiUtLSAQAJ
>
>
>
>
>
>
>
>