A group of args, of which either zero or one may be set, but not more.
Members:
- subargs
- a list [(
argname, arg), ...] of Arg instances.
argname is used to identify the corresponding arg in
error messages. (The name of the corresponding keyword
args is determined internally by each arg.)
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Methods
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__call__
__init__
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__call__
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__call__ ( self, keyw )
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Exceptions
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Errors.OptionError('Arguments %s and %s cannot both be specified' %( foundargname, argname, ) )
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__init__
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__init__ ( self, *subargs )
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