Serhiy Storchaka added the comment:
There are two methods: splitlist() and split(). The splitlist() method splits
only one level and always returns a tuple (even if it is empty or one-element).
The split() method splits recursive and can returns a string if it is not
splittable. I.e. result type of split() depends on if the argument contains
spaces.
Before issue18101 split() was broken on Python 3. It splitted recursively only
bytes objects but not unicode strings. After "fixing" it becomes split already
parsed tuples of strings.
Perhaps split() shouldn't recursive parse tuples. But in this case its purpose
is questionable. Recursive parse only string argument? But how it can
distinguish the list of two strings "a" and "b c" from the list of the "a"
string and the ["b", "c"] list? Both are spelled as {a {b c}} in Tcl.
The proposed patch gets rid from split() in the configure result parsing code
and uses two-level splitline() instead. Perhaps we should replace all left
split()-s to the appropriate number of splitline()-s.
----------
assignee: -> serhiy.storchaka
components: +IDLE, Tkinter
keywords: +patch
nosy: +gpolo
stage: needs patch -> patch review
Added file: http://bugs.python.org/file31766/tkinter_configure_splitlist.patch
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<http://bugs.python.org/issue19020>
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