IArrayLike

class pandas::IArrayLike

pandas C++ class.

Example

#include <pandas/pandas.h>
using namespace pandas;

// Use IArrayLike
IArrayLike obj;
// ... operations ...

I/O

Signature	Return Type	Location	Example
virtual std::shared_ptr<NDFrameBase> to_series() const = 0	virtual std::shared_ptr<NDFrameBase>	pd_callable_handle.h:111	View

Other Methods

Signature	Return Type	Location	Example
virtual std::string dtype_name() const = 0	virtual std::string	pd_callable_handle.h:105	View
virtual std::size_t size() const = 0	virtual std::size_t	pd_callable_handle.h:106	View

Code Examples

The following examples are extracted from the test suite.

to_series (pd_test_3_all.cpp:5788)

        throw std::runtime_error("to_frame use_index should be false when index=false");
    }
    if (frame3.column_name != "0") {
        throw std::runtime_error("to_frame column_name should be '0' when no name");
    }

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

void pd_test_3_all_period_index_to_series() {
    std::cout << "========= PeriodIndex.to_series() =====================";

    pandas::PeriodIndex idx = make_period_index({1, 2, 3}, "M").rename("periods");

    // Test to_series() with default parameters
    pandas::PeriodIndex::SeriesData series = idx.to_series();

    // values should have same size
    if (series.values.size() != 3) {
        throw std::runtime_error("to_series values size should be 3");
    }

dtype_name (pd_test_1_all.cpp:10104)

}

void pd_test_extension_index_array_constructor() {
    std::cout << "========= array constructor =========================";

    pandas::CategoricalArray arr({"apple", "banana", "apple", "cherry"});
    pandas::CategoricalIndex idx(arr, "fruits");

    bool passed = (idx.size() == 4 && !idx.empty() &&
                   idx.name().has_value() && *idx.name() == "fruits" &&
                   idx.dtype_name() == "category");
    if (!passed) {
        std::cout << "  [FAIL] : in pd_test_extension_index_array_constructor() : array constructor check failed" << std::endl;
        throw std::runtime_error("pd_test_extension_index_array_constructor failed");
    }

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

void pd_test_extension_index_copy_constructor() {
    std::cout << "========= copy constructor =========================";

size (pd_test_1_all.cpp:22)

#include "../pandas/pd_boolean_array.h"

namespace dataframe_tests {

namespace dataframe_tests_boolean_array {
    void pd_test_boolean_array_constructors() {
        std::cout << "========= BooleanArray: constructors ======================= ";

        // Default constructor
        pandas::BooleanArray arr1;
        if (arr1.size() != 0) {
            std::cout << "  [FAIL] : in pd_test_boolean_array_constructors() : default constructor size != 0" << std::endl;
            throw std::runtime_error("pd_test_boolean_array_constructors failed: default constructor size != 0");
        }

        // Initializer list constructor
        pandas::BooleanArray arr2({
            std::optional<bool>(true),
            std::optional<bool>(false),
            std::nullopt,
            std::optional<bool>(true)