and UserString.MutableString.__delitem__.

unicodedata.east_asian_width().  You can still implement your own
simple width() function using it like this:
    def width(u):
        w = 0
        for c in unicodedata.normalize('NFC', u):
            cwidth = unicodedata.east_asian_width(c)
            if cwidth in ('W', 'F'): w += 2
            else: w += 1
        return w

addition to unicode objects.

and test_support.run_classtests() into run_unittest()
and use it wherever possible.

Also don't use "from test.test_support import ...", but
"from test import test_support" in a few spots.

From SF patch #662807.

between str, unicode, UserString and the string module
as possible. This increases code coverage in stringobject.c
from 83% to 86% and should help keep the string classes
in sync in the future. From SF patch #662807

Closes SF Bug #592573 where inplace add mutated a UserString.
Added unittests to verify the bug is cleared.

string of longer than 1 character.

imports e.g. test_support must do so using an absolute package name
such as "import test.test_support" or "from test import test_support".

This also updates the README in Lib/test, and gets rid of the
duplicate data dirctory in Lib/test/data (replaced by
Lib/email/test/data).

Now Tim and Jack can have at it. :)

The test function's signature should be

    test(methodname, input, output, *args)

but the output argument was omitted.  This caused all tests to fail,
because the expected output was passed as the initial argument to the
method call.  But because of the way the test works (it compares the
results for a regular string to the results for a UserString instance
with the same value, and it's OK if both raise the same exception) the
test never failed!

I've fixed this, and also cleaned up a few warts in the verbose
output.  Finally, I've made it possible to run the test stand-alone in
verbose mode by passing -v as a command line argument.

Now, the test will report failure related to zfill.  That's not my
fault, that's a legitimate problem: the string_tests.py file contains
a test for the zfill() method (just added) but this method is not
implemented.  The responsible party will surely fix this soon now.

(This one was trivial -- no actual string. references in it!)

'verify' iff it's used by a test module...

and replaces them with a new API verify(). As a result the regression
suite will also perform its tests in optimization mode.

Written by Marc-Andre Lemburg. Copyright assigned to Guido van Rossum.

test_string and test_userstring run same tests for string methods