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openAnything

def openAnything(source):
    # try open with urllib (http, ftp, file URL)
    import urllib
    try:
        return urllib.urlopen(source)
    except (IOError, OSError):
        pass

    # try open with native open
    try:
        return open(source)
    except (IOError, OSError):
        pass

    # treat source as string
    import StringIO
    return StringIO.StringIO(str(source))


Now you can use this openAnything function in conjunction with minidom.parse to make a function that takes
a source that refers to an XML document somehow (either as a URL, or a local filename, or a hard−coded XML
document in a string) and parses it.
 

def _load(self, source):
    sock = toolbox.openAnything(source)
    xmldoc = minidom.parse(sock).documentElement
    sock.close()
    return xmldoc

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