Source code for getml.sqlite3.read_list

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"""
Reads data into an sqlite3 table.
"""

import sqlite3

from .helpers import _get_num_columns, _log


[docs]def read_list(conn, table_name, data): """ Reads data into an sqlite3 table. Args: conn: A sqlite3 connection created by :func:`~getml.sqlite3.connect`. table_name (str): The name of the table to write to. data (List[List[Object]]): The data to insert into the table. Every list represents one row to be read into the table. """ # ------------------------------------------------------------ if not isinstance(conn, sqlite3.Connection): raise TypeError("'conn' must be an sqlite3.Connection object") if not isinstance(table_name, str): raise TypeError("'table_name' must be a string") if not isinstance(data, list): raise TypeError("'data' must be a list of lists") # ------------------------------------------------------------ ncols = _get_num_columns(conn, table_name) old_length = len(data) data = [line for line in data if len(line) == ncols] placeholders = "(" + ",".join(["?"] * ncols) + ")" query = 'INSERT INTO "' + table_name + '" VALUES ' + placeholders conn.executemany(query, data) conn.commit() _log( "Read " + str(len(data)) + " lines. " + str(old_length - len(data)) + " invalid lines." )