case-sensitivity

Ron Adam radam2 at tampabay.rr.com
Fri Nov 14 13:24:54 CET 2003


On Fri, 14 Nov 2003 10:46:04 GMT, Alex Martelli <aleax at aleax.it>
wrote:

>Ron Adam wrote:
>    ...
>> I wonder how difficult it would be to write a program that searches
>> the library and counts the number of instances like spelling with
>> differing case are used?
>
>You mean "used within the same namespace"?  Not too hard, since the
>key test is nothing more than something like:
>
>o
>
>so basically it boils down to finding all namespaces of interest.
>
>Easy for modules, easy for classes, NOT easy for class-instances
>as you'd really have to create the instances to check for such
>cases as, e.g.:
>
>class Foo(object):
>    def blab(self): return self.BLAB
>    def __init__(self, BLAB): self.BLAB = BLAB
>
>So here's a q&d check for such module-level conflicts I just
>cobbled together (avoiding obsolete modules):
>
>import sys, glob, os.path, sets
>
>avoid = sets.Set('''
>    FCNTL posixfile pre regsub statcache TERMIOS this tzparse xmllib
>    '''.split())
>
>for where in sys.path:
>    modules = glob.glob(os.path.join(where, '*.py'))
>    modnams = [os.path.basename(m)[:-3] for m in modules]
>    for m in modnams:
>        if m in avoid: continue
>        try: modobj = __import__(m)
>        except ImportError: continue
>        dd = dir(modobj)
>        lowdd = [ n.lower() for n in dd ]
>        slowd = sets.Set(lowdd)
>        if len(dd) != len(slowd):
>            print '%s:'%m,
>            n = 0
>            for d in dd:
>                if lowdd.count(d.lower()) != 1:
>                    print d,
>                    n += 1
>            print
>
>The hits in the top-level of the standard libraries are:
>
>binhex: BinHex HexBin binhex hexbin
>copy: Error error
>popen2: Popen3 Popen4 popen3 popen4
>pydoc: Doc doc
>random: Random random
>repr: Repr repr
>sre_parse: SUBPATTERN SubPattern
>sre: TEMPLATE template
>tarfile: VERSION version
>threading: _VERBOSE _Verbose
>tokenize: COMMENT Comment NAME NUMBER Name Number STRING String string
>xmlrpclib: Boolean boolean
>
>
>there are more in lib-tk and Numeric, but not everybody will be
>interested in those, I guess.
>
>
>Alex

Thanks Alex,  I'll play around with this a bit.

It looks like the number of them is low enough to build in exceptions
for already existing instances,  and it may be possible to have a
policy of avoiding it in the future.

In any case,  this is helping understand how python works.  I'm
finding it very interesting that so much of python is programmed in
python.

_Ron Adam






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