cf.Data.__nonzero__

Data.__nonzero__()[source]

Truth value testing and the built-in operation bool

x.__nonzero__() <==> x != 0

Examples:
>>> bool(cf.Data(1))
True
>>> bool(cf.Data([[False]]))
False
>>> bool(cf.Data([1, 2]))
ValueError: The truth value of Data with more than one element is ambiguous. Use d.any() or d.all()

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