Revision 070b780d lib/cmdlib.py

b/lib/cmdlib.py
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    uuid = self.cfg.LookupNetwork(self.op.network_name)
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    if uuid:
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      raise errors.OpPrereqError("Network '%s' already defined" %
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                                 self.op.network, errors.ECODE_EXISTS)
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      raise errors.OpPrereqError(("Network with name '%s' already exists" %
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                                  self.op.network_name), errors.ECODE_EXISTS)
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    # Check tag validity
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    for tag in self.op.tags:

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