Python 3.5+operatorfunction

operator.matmul

matrix multiplication

Matrix multiplication: a @ b (invokes __matmul__).

Syntax

operator.matmul(a, b)

No built-in type supports @: matmul(2, 3) raises TypeError. The operator arrived in Python 3.5 (PEP 465) specifically for linear-algebra libraries such as NumPy and PyTorch. Your own class gains support through __matmul__ and the reflected __rmatmul__.

Examples

import operator
class M:
    def __matmul__(self, other): return 'mm'
print(operator.matmul(M(), M()))   # → mm

See also

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