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Miniature operators for Python

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This library makes it almost trivial to add extended operators to the python language, or to transform existing functions into binary operators. For example, one might take the function compose:

def compose(f, g):
    return lambda *args, **kwargs: f(g(*args, **kwargs))

And turn it into an operator, |compose|:

compose = MiniOperator(compose)

Then, the operator can be used as a binary operator [1]:

f = math.sqrt  |compose|  (lambda x: x**2 + 1)
f(0) # 1.0

If one consistently uses this |<name>| notation and parenthesises arguments, no problems should arise [2].

Furthermore, the operator thus created will support overriding through the standard Python convention of __<name>__ and __r<name>__ special methods.


The MiniOperator constructor can be called in three ways. MiniOperator(f) creates an operator named f that uses f as its default operation [3]. A name can also be explicitely passed: MiniOperator(name, f), where name is a string, will create an operator named name that uses f as a default operation. Finally, one can create an operator without specifying a default method: MiniOperator(name), where name is a string, will result in an operator that will throw a NotImplementedError when used on most arguments. However, a class will be able to explicitely override __<name>__ or __r<name>__ to support this operator.


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