It is causing trouble like e.g. hanging processes.

Some third-party projects, such as matplotlib and PIL/Pillow,
depended on being able to build with Tcl and Tk frameworks in
/Library/Frameworks.  They were unable to build with the built-in
Tcl/Tk and/or execute correctly.

screen refresh problem.

pseudo-random number generator on fork().

100 headers are read.  Adapted from patch by Jyrki Pulliainen.

prevent readline() calls from consuming too much memory.  Patch by Jyrki
Pulliainen.

prevent readline() calls from consuming too much memory.  Patch by Jyrki
Pulliainen.

for security reasons.  It now doesn't match multiple wildcards nor wildcards
inside IDN fragments.

line length.  Patch by Emil Lind.

This mitigates the current Aqua Tk refresh problem on OS X 10.9
by backporting 2.7.x behavior and is transparent to the user.

Make it easier for users to make use of the backup _tkinter linked
with the third-party Tcl and Tk frameworks in /Library/Frameworks.
The two tkinter variants are now installed in separate directories
under a new lib-tkinter.  This allows per-user selection by
manipulating sys.path, directly or with PYTHONPATH.  If this
proves useful, we can supply a more convenient user interface
to supply the paths.  For now, this remains somewhat experimental.

compute timeout.

10.8+ when using a universal Python that included a PPC architecture,
such as with a python.org 32-bit-only binary installer.

being defined on top of __name__.

of OPT for special build options.  By setting OPT, some compiler-specific
options like -fwrapv were overridden and thus not used, which could result
in broken interpreters when building with clang.

64-bit/32-bit installer for 10.6+.  It is no longer necessary
to install a third-party version of Tcl/Tk 8.5 to work around the
problems in the Apple-supplied Tcl/Tk 8.5 shipped in OS X 10.6
and later releases.

when building _tkinter.  configure has two new options; if used, both must
be specified:

  ./configure \
      --with-tcltk-includes="-I/opt/local/include" \
      --with-tcltk-libs="-L/opt/local/lib -ltcl8.5 -ltk8.5"

In addition, the options can be overridden with make:

   make \
       TCLTK_INCLUDES="-I/opt/local/include" \
       TCLTK_LIBS="-L/opt/local/lib -ltcl8.6 -ltk8.6"

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

argument.  Original patch by Arfrever Frehtes Taifersar Arahesis.

Issue #19352: Fix unittest discovery when a module can be reached through several paths (e.g. under Debian/Ubuntu with virtualenv).

Patch by Sunny K.