IndexDtype ========== .. cpp:class:: numpy::IndexDtype numpy C++ class. Example ------- .. code-block:: cpp #include using namespace numpy; // Use IndexDtype IndexDtype obj; // ... operations ... Indexing / Selection -------------------- .. list-table:: :widths: 40 20 15 25 :header-rows: 1 * - Signature - Return Type - Location - Example * - ``size_t itemsize() const override`` - size_t - df_index_dtype.h:109 - :ref:`View ` Type Checking ------------- .. list-table:: :widths: 40 20 15 25 :header-rows: 1 * - Signature - Return Type - Location - Example * - ``bool is_datetime() const`` - bool - df_index_dtype.h:213 - * - ``bool is_floating() const`` - bool - df_index_dtype.h:199 - * - ``bool is_integer() const`` - bool - df_index_dtype.h:192 - * - ``bool is_nullable() const override`` - bool - df_index_dtype.h:138 - * - ``bool is_numeric() const`` - bool - df_index_dtype.h:185 - :ref:`View ` * - ``bool is_object() const`` - bool - df_index_dtype.h:206 - * - ``bool is_timedelta() const`` - bool - df_index_dtype.h:220 - Other Methods ------------- .. list-table:: :widths: 40 20 15 25 :header-rows: 1 * - Signature - Return Type - Location - Example * - ``std::string inferred_type() const`` - std::string - df_index_dtype.h:166 - * - ``std::string kind() const override`` - std::string - df_index_dtype.h:118 - * - ``std::string name() const override`` - std::string - df_index_dtype.h:39 - :ref:`View ` * - ``numpy::DType numpy_dtype() const override`` - numpy::DType - df_index_dtype.h:75 - * - ``std::string repr() const override`` - std::string - df_index_dtype.h:154 - * - ``const std::type_info& type() const override`` - const std::type_info& - df_index_dtype.h:146 - :ref:`View ` Code Examples ------------- The following examples are extracted from the test suite. .. _example-indexdtype-itemsize-0: .. dropdown:: itemsize (np_test_2_all.cpp:3540) :class-title: example-dropdown .. code-block:: cpp :linenos: :lineno-start: 3530 :emphasize-lines: 11 } // Test size if (!(size(arr) == 24)) { std::string description = std::string("testArrayInfo():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(size(arr) == 24)"; std::cout << std::string("[FAIL] ") + description << std::endl; throw std::runtime_error(description); } // Test itemsize if (!(itemsize(arr) == sizeof(double))) { std::string description = std::string("testArrayInfo():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(itemsize(arr) == sizeof(double))"; std::cout << std::string("[FAIL] ") + description << std::endl; throw std::runtime_error(description); } // Test nbytes if (!(nbytes(arr) == 24 * sizeof(double))) { std::string description = std::string("testArrayInfo():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(nbytes(arr) == 24 * sizeof(double))"; std::cout << std::string("[FAIL] ") + description << std::endl; throw std::runtime_error(description); .. _example-indexdtype-is_numeric-1: .. dropdown:: is_numeric (np_test_1_all.cpp:7511) :class-title: example-dropdown .. code-block:: cpp :linenos: :lineno-start: 7501 :emphasize-lines: 11 std::cout << " -> tests passed" << std::endl; } void testNumericConversionStringTypes() { std::cout << "========= testNumericStringOperationsStringTypes ======================="; str32 num_str1("123.45"); str32 num_str2("67.89"); str32 not_num("hello"); // std::cout << "String '" << num_str1 << "' is numeric: " << is_numeric(num_str1) << std::endl; // std::cout << "String '" << not_num << "' is numeric: " << is_numeric(not_num) << std::endl; if (is_numeric(num_str1)) { double val1 = to_numeric(num_str1); // std::cout << "Numeric value of '" << num_str1 << "': " << val1 << std::endl; } if (is_numeric(num_str2)) { double val2 = to_numeric(num_str2); // std::cout << "Numeric value of '" << num_str2 << "': " << val2 << std::endl; .. _example-indexdtype-name-2: .. dropdown:: name (np_test_1_all.cpp:24865) :class-title: example-dropdown .. code-block:: cpp :linenos: :lineno-start: 24855 :emphasize-lines: 11 uint64_t before_restore = rng.next_uint64(); rng.set_state(state); uint64_t after_restore = rng.next_uint64(); if (before_restore != after_restore) { std::cout << " [FAIL] : in np_test_bitgen_mt19937() : state restore failed"; throw std::runtime_error("np_test_bitgen_mt19937 failed: state"); } // Test name if (rng.name() != "MT19937") { std::cout << " [FAIL] : in np_test_bitgen_mt19937() : incorrect name"; throw std::runtime_error("np_test_bitgen_mt19937 failed: name"); } std::cout << " -> tests passed" << std::endl; } // ============================================================================ // PCG64 TESTS // ============================================================================ .. _example-indexdtype-type-3: .. dropdown:: type (np_test_1_all.cpp:2240) :class-title: example-dropdown .. code-block:: cpp :linenos: :lineno-start: 2230 :emphasize-lines: 11 std::string description = std::string("testArrayEdgeCases():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(multi_array.getElementAt({0, 1}).is_type())"; std::cout << std::string("[FAIL] ") + description << std::endl; throw std::runtime_error(description); } if (!(multi_array.getElementAt({0, 2}).is_type())) { std::string description = std::string("testArrayEdgeCases():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(multi_array.getElementAt({0, 2}).is_type())"; std::cout << std::string("[FAIL] ") + description << std::endl; throw std::runtime_error(description); } // Test 4: Arrays with all same type (homogeneous) NDArray homo_array = createObjectZeros({5}); for (size_t i = 0; i < 5; ++i) { homo_array.setElementAt({i}, object_(static_cast(i * 10))); } // Verify all are same type for (size_t i = 0; i < 5; ++i) { object_ obj = homo_array.getElementAt({i}); if (!(obj.is_type())) { std::string description = std::string("testArrayEdgeCases():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(obj.is_type())";