PartialKeyResult

class pandas::PartialKeyResult

pandas C++ class.

Example

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

// Use PartialKeyResult
PartialKeyResult obj;
// ... operations ...

Type Checking

Signature	Return Type	Location	Example
bool is_single_level() const { return single_index.has_value()	bool	pd_multiindex.h:3273	View

Code Examples

The following examples are extracted from the test suite.

is_single_level (pd_test_3_all.cpp:26357)

    std::vector<std::vector<std::string>> arrays = {
        {"foo", "foo", "bar", "bar"},
        {"one", "two", "one", "two"}
    };
    std::vector<std::optional<std::string>> names = {"first", "second"};
    auto mi = ::pandas::MultiIndex::from_arrays<std::string>(arrays, names);

    auto pk = ::pandas::select_by_first_level(mi,"foo");
    if (pk.matched_indices.size() != 2) throw std::runtime_error("Expected 2 matches for 'foo'");
    if (pk.matched_indices[0] != 0 || pk.matched_indices[1] != 1) throw std::runtime_error("Wrong indices for 'foo'");
    if (!pk.is_single_level()) throw std::runtime_error("Expected single level for 2-level MI");
    auto idx = *pk.single_index;
    if (idx.size() != 2) throw std::runtime_error("Expected index size 2");
    if (idx[0] != "one" || idx[1] != "two") throw std::runtime_error("Wrong index values");
    if (!idx.name().has_value() || *idx.name() != "second") throw std::runtime_error("Wrong index name");
    std::cout << "    PASSED" << std::endl;
}

void pd_test_multiindex_partial_key_bar() {
    std::cout << "  Testing select_by_first_level 2-level 'bar'..." << std::endl;
    std::vector<std::vector<std::string>> arrays = {