call site 0 for path.local.__add__
path/local/testing/test_local.py - line 212
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   def test_sysfind_absolute(self):
->     x = py.path.local.sysfind('test')
       assert x.check(file=1)
       y = py.path.local.sysfind(str(x)) 
       assert y.check(file=1) 
       assert y == x 
path/local/local.py - line 535
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   def sysfind(cls, name, checker=None):
       """ return a path object found by looking at the systems
               underlying PATH specification. If the checker is not None
               it will be invoked to filter matching paths.  If a binary
               cannot be found, None is returned
               Note: This is probably not working on plain win32 systems
               but may work on cygwin.
           """
       if os.path.isabs(name):
           p = py.path.local(name)
           if p.check(file=1):
               return p
       else:
           if py.std.sys.platform == 'win32':
               paths = py.std.os.environ['Path'].split(';')
               try:
                   systemroot = os.environ['SYSTEMROOT']
               except KeyError:
                   pass
               else:
                   paths = [re.sub('%SystemRoot%', systemroot, path)
                            for path in paths]
               tryadd = '', '.exe', '.com', '.bat' # XXX add more?
           else:
               paths = py.std.os.environ['PATH'].split(':')
               tryadd = ('',)
   
           for x in paths:
               for addext in tryadd:
->                 p = py.path.local(x).join(name, abs=True) + addext
                   try:
                       if p.check(file=1):
                           if checker:
                               if not checker(p):
                                   continue
                           return p
                   except py.error.EACCES:
                       pass
       return None