[Python-bugs-list] [ python-Bugs-725916 ] Tkinter.DoubleVar data corruption

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Bugs item #725916, was opened at 2003-04-22 19:01
Message generated for change (Comment added) made by tim_one
You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=725916&group_id=5470

Category: Tkinter
Group: None
>Status: Closed
>Resolution: Duplicate
Priority: 5
Submitted By: Lonnie Princehouse (caprice_of_mind)
Assigned to: Nobody/Anonymous (nobody)
Summary: Tkinter.DoubleVar data corruption

Initial Comment:
Tkinter.DoubleVar is performing the equivalent of float(str
(x)), resulting in the unnecessary amputation of a few 
siginificant digits because str() does not return enough 
digits to represent the full range of a 64-bit float.

Example:

x = 0.33333333333333098
from Tkinter import *
y = DoubleVar(Tk())
y.set(x)

# x == 0.33333333333333098
# y.get() == 0.33333333333300003

if y.get() == x:
  print "Good!"
else:
  print "Bad!"



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>Comment By: Tim Peters (tim_one)
Date: 2003-04-22 21:33

Message:
Logged In: YES 
user_id=31435

This is a duplicate of bug 721171, already fixed for 2.3.

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You can respond by visiting: 
https://sourceforge.net/tracker/?func=detail&atid=105470&aid=725916&group_id=5470