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- from sympy.tensor.tensor import TensorIndexType, tensor_indices, TensorHead
- from sympy import I
- def test_printing_TensMul():
- R3 = TensorIndexType('R3', dim=3)
- p, q = tensor_indices("p q", R3)
- K = TensorHead("K", [R3])
- assert repr(2*K(p)) == "2*K(p)"
- assert repr(-K(p)) == "-K(p)"
- assert repr(-2*K(p)*K(q)) == "-2*K(p)*K(q)"
- assert repr(-I*K(p)) == "-I*K(p)"
- assert repr(I*K(p)) == "I*K(p)"
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