NPZWriter

class numpy::NPZWriter

Input/output operations class.

Example

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

// Use NPZWriter
NPZWriter obj;
// ... operations ...

Constructors

Signature	Location	Example
NPZWriter(const std::string &filename, boolcompress = false, intlevel = 6)	NP_NPZ_UTILS.H:216

Math Operations

Signature	Return Type	Location	Example
void add_array(const std::string &name, const NDArray<T>&array)	void	NP_NPZ_UTILS.H:223	View

Other Methods

Signature	Return Type	Location	Example
void finalize()	void	NP_NPZ_UTILS.H:279	View

Code Examples

The following examples are extracted from the test suite.

add_array (np_test_5_all.cpp:657)

        std::cout << "  [FAIL] : " << message;
        throw std::runtime_error("Test failed: " + message);
      }
    }

    // ============================================================================
    // NPZ FILE OPERATIONS TESTS
    // ============================================================================

    void np_test_io_npz_writer_add_array() {
      std::cout << "========= NPZWriter.add_array() ================================";

      ensure_test_dir();

      // Create test arrays
      numpy::NDArray<int> arr1_flat = numpy::arange<int>(0, 12);
      numpy::NDArray<int> arr1({ 3, 4 });
      for (int i = 0; i < 12; ++i) {
        arr1.setElementAt({ static_cast<size_t>(i / 4), static_cast<size_t>(i % 4) }, i);
      }

finalize (np_test_5_all.cpp:682)

      numpy::npz::NPZWriter writer(filename, false);  // No compression for this test

      // Test add_array functionality
      writer.add_array("integers", arr1);
      writer.add_array("floats", arr2);

      // std::cout << "  Added 2 arrays to NPZ file" << std::endl;
      // std::cout << "  Array 1: integers (3x4)" << std::endl;
      // std::cout << "  Array 2: floats (10,)" << std::endl;

      // Note: File is written in finalize(), tested separately

      std::cout << " -> tests passed" << std::endl;
    }

    void np_test_io_npz_writer_finalize() {
      std::cout << "========= NPZWriter.finalize() =================================";

      ensure_test_dir();

      // Create and finalize an NPZ file