New submission from Serhiy Storchaka:
A long time Tcl got support first 64-bit integers, and then arbitrary size
integers. Python also supports arbitrary size integers. However Tkinter
supports only C long integers. For example, on 32-bit platform:
>>> import tkinter
>>> t = tkinter.Tk()
>>> t.tk.call('expr', 2**30)
1073741824
>>> t.tk.call('expr', 2**31)
<wideInt object at 0x9122518>
>>> t.tk.call('expr', 2**63)
<bignum object at 0x9126010>
Those <wideInt object> and <bignum object> are not usable from Python.
Potentially this can cause errors in some rare circumstances.
I'm working on a patch, but was faced with a problem. Tcl provides functions
for conversions between Bignum Tcl object and mp_int, but it does not provide
all functions for conversions between mp_int and bytes sequence. Which is
better, add libtommath library to CPython dependencies, or implement the
missing functionality manually? Or may be use haxadecimal representation for
conversions?
----------
assignee: serhiy.storchaka
components: Tkinter
messages: 178815
nosy: gpolo, serhiy.storchaka
priority: normal
severity: normal
stage: needs patch
status: open
title: Tkinter doesn't support large integers
type: behavior
versions: Python 2.7, Python 3.2, Python 3.3, Python 3.4
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue16840>
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