IndexDtype

class numpy::IndexDtype

numpy C++ class.

Example

#include <numpy/np_ndarray.h>
using namespace numpy;

// Use IndexDtype
IndexDtype obj;
// ... operations ...

Indexing / Selection

Signature	Return Type	Location	Example
size_t itemsize() const override	size_t	df_index_dtype.h:109	View

Type Checking

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	View
bool is_object() const	bool	df_index_dtype.h:206
bool is_timedelta() const	bool	df_index_dtype.h:220

Other Methods

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	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	View

Code Examples

The following examples are extracted from the test suite.

itemsize (np_test_2_all.cpp:3540)

      }

      // 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);

is_numeric (np_test_1_all.cpp:7511)

    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;

name (np_test_1_all.cpp:24865)

      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
    // ============================================================================

type (np_test_1_all.cpp:2240)

        std::string description = std::string("testArrayEdgeCases():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(multi_array.getElementAt({0, 1}).is_type<std::string>())";
        std::cout << std::string("[FAIL] ") + description << std::endl;
        throw std::runtime_error(description);
    }
    if (!(multi_array.getElementAt({0, 2}).is_type<double>())) {
        std::string description = std::string("testArrayEdgeCases():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(multi_array.getElementAt({0, 2}).is_type<double>())";
        std::cout << std::string("[FAIL] ") + description << std::endl;
        throw std::runtime_error(description);
    }

    // Test 4: Arrays with all same type (homogeneous)
    NDArray<object_> homo_array = createObjectZeros({5});
    for (size_t i = 0; i < 5; ++i) {
        homo_array.setElementAt({i}, object_(static_cast<int>(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<int>())) {
            std::string description = std::string("testArrayEdgeCases():") + __FILE__ + ":" + std::to_string(__LINE__) + ": !(obj.is_type<int>())";