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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def verify_full_extraction():
 """This is an experimental endpoint to simultaneously verify data statistics and extraction for training, test, and holdout datasets. With this, the other three verification methods will no longer be necessary. """

    path = functions.get_path_from_query_string(request)

    if request.method == 'POST':
        rqtasks.extraction_data_statistics(path)

    with functions.DBContextManager(path) as session:
        extraction = session.query(models.Extraction).first()
        return jsonify(extraction.data_statistics)