How to use the macholib.dyld.framework_find function in macholib

self.dylib_excludes = []
        for fn in dylib_excludes:
            try:
                res = macholib.dyld.framework_find(fn)
            except ValueError:
                try:
                    res = macholib.dyld.dyld_find(fn)
                except ValueError:
                    res = fn
            self.dylib_excludes.append(res)
        self.resources = fancy_split(self.resources)
        frameworks = fancy_split(self.frameworks)
        self.frameworks = []
        for fn in frameworks:
            try:
                res = macholib.dyld.framework_find(fn)
            except ValueError:
                res = macholib.dyld.dyld_find(fn)
            while res in self.dylib_excludes:
                self.dylib_excludes.remove(res)
            self.frameworks.append(res)
        if not self.plist:
            self.plist = {}
        if isinstance(self.plist, basestring):
            self.plist = plistlib.Plist.fromFile(self.plist)
        if isinstance(self.plist, plistlib.Dict):
            self.plist = dict(self.plist.__dict__)
        else:
            self.plist = dict(self.plist)

        self.set_undefined_options('bdist',
                                   ('dist_dir', 'dist_dir'),

# included by apptemplate
        self.excludes.add('site')
        if getattr(self.distribution, 'install_requires', None):
            self.includes.add('pkg_resources')
            self.eggs = pkg_resources.require(self.distribution.install_requires)

        # Setuptools/distribute style namespace packages uses
        # __import__('pkg_resources'), and that import isn't detected at the
        # moment. Forcefully include pkg_resources.
        self.includes.add('pkg_resources')

        dylib_excludes = fancy_split(self.dylib_excludes)
        self.dylib_excludes = []
        for fn in dylib_excludes:
            try:
                res = macholib.dyld.framework_find(fn)
            except ValueError:
                try:
                    res = macholib.dyld.dyld_find(fn)
                except ValueError:
                    res = fn
            self.dylib_excludes.append(res)
        self.resources = fancy_split(self.resources)
        frameworks = fancy_split(self.frameworks)
        self.frameworks = []
        for fn in frameworks:
            try:
                res = macholib.dyld.framework_find(fn)
            except ValueError:
                res = macholib.dyld.dyld_find(fn)
            while res in self.dylib_excludes:
                self.dylib_excludes.remove(res)