human
Solve the following python programming problem given the following code:
def ant_glob(self, * k, **kw) : 
    "
        This method is used for finding files across folders. It behaves like ant patterns:

        * ``**/*`` find all files recursively
        * ``**/*.class`` find all files ending by .class
        * ``..`` find files having two dot characters

        For example::

            def configure(cfg):
                cfg.path.ant_glob('**/*.cpp') # find all .cpp files
                cfg.root.ant_glob('etc/*.txt') # using the filesystem root can be slow
                cfg.path.ant_glob('*.cpp', excl=['*.c'], src=True, dir=False)

        For more information see http://ant.apache.org/manual/dirtasks.html

        The nodes that correspond to files and folders that do not exist will be removed

        :param incl: ant patterns or list of patterns to include
        :type incl: string or list of strings
        :param excl: ant patterns or list of patterns to exclude
        :type excl: string or list of strings
        :param dir: return folders too (False by default)
        :type dir: bool
        :param src: return files (True by default)
        :type src: bool
        :param remove: remove files/folders that do not exist (True by default)
        :type remove: bool
        :param maxdepth: maximum depth of recursion
        :type maxdepth: int
        " 
    src = kw.get ('src', True) 
    dir = kw.get ('dir', False) 
    excl = kw.get ('excl', exclude_regs) 
    incl = ((k and k [0]) or kw.get ('incl', '**')) 
    def to_pat(s) : 
        lst = to_list (s) 
        ret = [] 
        for x in lst : 
            x = x.replace ('\\', '/').replace ('//', '/') 
            if x.endswith ('/') : 
                x += '**' 
lst2 = x.split ('/') 
            accu = [] 
            for k in lst2 : 
                if (k == '**') : 
                    accu.append (k) 
else : 
                    k = k.replace ('.', '[.]').replace ('*', '.*').replace ('?', '.').replace ('+', '\\+') 
                    k = ('^%s$' % k) 
                    accu.append (re.compile (k))...

    
    

    Fix the buggy line: return ' '.join ([x.path_from (self) for x in excl])
assistant
#Here is Python program to find all files recursively
.

return ' '.join ([x.path_from (self) for x in ret])