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Python MutableDenseNDimArray.zeros方法代码示例

本文整理汇总了Python中sympy.tensor.array.dense_ndim_array.MutableDenseNDimArray.zeros方法的典型用法代码示例。如果您正苦于以下问题:Python MutableDenseNDimArray.zeros方法的具体用法?Python MutableDenseNDimArray.zeros怎么用?Python MutableDenseNDimArray.zeros使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在sympy.tensor.array.dense_ndim_array.MutableDenseNDimArray的用法示例。


在下文中一共展示了MutableDenseNDimArray.zeros方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。

示例1: test_ndim_array_initiation

# 需要导入模块: from sympy.tensor.array.dense_ndim_array import MutableDenseNDimArray [as 别名]
# 或者: from sympy.tensor.array.dense_ndim_array.MutableDenseNDimArray import zeros [as 别名]
def test_ndim_array_initiation():
    arr_with_one_element = MutableDenseNDimArray([23])
    assert len(arr_with_one_element) == 1
    assert arr_with_one_element[0] == 23
    assert arr_with_one_element.rank() == 1
    raises(ValueError, lambda: arr_with_one_element[1])

    arr_with_symbol_element = MutableDenseNDimArray([Symbol('x')])
    assert len(arr_with_symbol_element) == 1
    assert arr_with_symbol_element[0] == Symbol('x')
    assert arr_with_symbol_element.rank() == 1

    number5 = 5
    vector = MutableDenseNDimArray.zeros(number5)
    assert len(vector) == number5
    assert vector.shape == (number5,)
    assert vector.rank() == 1
    raises(ValueError, lambda: arr_with_one_element[5])

    vector = MutableSparseNDimArray.zeros(number5)
    assert len(vector) == number5
    assert vector.shape == (number5,)
    assert vector._sparse_array == {}
    assert vector.rank() == 1

    n_dim_array = MutableDenseNDimArray(range(3**4), (3, 3, 3, 3,))
    assert len(n_dim_array) == 3 * 3 * 3 * 3
    assert n_dim_array.shape == (3, 3, 3, 3)
    assert n_dim_array.rank() == 4
    raises(ValueError, lambda: n_dim_array[0, 0, 0, 3])
    raises(ValueError, lambda: n_dim_array[3, 0, 0, 0])
    raises(ValueError, lambda: n_dim_array[3**4])

    array_shape = (3, 3, 3, 3)
    sparse_array = MutableSparseNDimArray.zeros(*array_shape)
    assert len(sparse_array._sparse_array) == 0
    assert len(sparse_array) == 3 * 3 * 3 * 3
    assert n_dim_array.shape == array_shape
    assert n_dim_array.rank() == 4

    one_dim_array = MutableDenseNDimArray([2, 3, 1])
    assert len(one_dim_array) == 3
    assert one_dim_array.shape == (3,)
    assert one_dim_array.rank() == 1
    assert one_dim_array.tolist() == [2, 3, 1]

    shape = (3, 3)
    array_with_many_args = MutableSparseNDimArray.zeros(*shape)
    assert len(array_with_many_args) == 3 * 3
    assert array_with_many_args.shape == shape
    assert array_with_many_args[0, 0] == 0
    assert array_with_many_args.rank() == 2
开发者ID:abhi98khandelwal,项目名称:sympy,代码行数:54,代码来源:test_mutable_ndim_array.py


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