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"""
MySQLdb - A DB API v2.0 compatible interface to MySQL.

This package is a wrapper around _mysql, which mostly implements the
MySQL C API.

connect() -- connects to server

See the C API specification and the MySQL documentation for more info
on other items.

For information on how MySQLdb handles type conversion, see the
MySQLdb.converters module.
"""

from .release import version_info
from . import _mysql

if version_info != _mysql.version_info:
    raise ImportError(
        f"this is MySQLdb version {version_info}, "
        f"but _mysql is version {_mysql.version_info!r}\n"
        f"_mysql: {_mysql.__file__!r}"
    )


from ._mysql import (
    NotSupportedError,
    OperationalError,
    get_client_info,
    ProgrammingError,
    Error,
    InterfaceError,
    debug,
    IntegrityError,
    string_literal,
    MySQLError,
    DataError,
    DatabaseError,
    InternalError,
    Warning,
)
from MySQLdb.constants import FIELD_TYPE
from MySQLdb.times import (
    Date,
    Time,
    Timestamp,
    DateFromTicks,
    TimeFromTicks,
    TimestampFromTicks,
)

threadsafety = 1
apilevel = "2.0"
paramstyle = "format"


class DBAPISet(frozenset):
    """A special type of set for which A == x is true if A is a
    DBAPISet and x is a member of that set."""

    def __eq__(self, other):
        if isinstance(other, DBAPISet):
            return not self.difference(other)
        return other in self


STRING = DBAPISet([FIELD_TYPE.ENUM, FIELD_TYPE.STRING, FIELD_TYPE.VAR_STRING])
BINARY = DBAPISet(
    [
        FIELD_TYPE.BLOB,
        FIELD_TYPE.LONG_BLOB,
        FIELD_TYPE.MEDIUM_BLOB,
        FIELD_TYPE.TINY_BLOB,
    ]
)
NUMBER = DBAPISet(
    [
        FIELD_TYPE.DECIMAL,
        FIELD_TYPE.DOUBLE,
        FIELD_TYPE.FLOAT,
        FIELD_TYPE.INT24,
        FIELD_TYPE.LONG,
        FIELD_TYPE.LONGLONG,
        FIELD_TYPE.TINY,
        FIELD_TYPE.YEAR,
        FIELD_TYPE.NEWDECIMAL,
    ]
)
DATE = DBAPISet([FIELD_TYPE.DATE])
TIME = DBAPISet([FIELD_TYPE.TIME])
TIMESTAMP = DBAPISet([FIELD_TYPE.TIMESTAMP, FIELD_TYPE.DATETIME])
DATETIME = TIMESTAMP
ROWID = DBAPISet()


def test_DBAPISet_set_equality():
    assert STRING == STRING


def test_DBAPISet_set_inequality():
    assert STRING != NUMBER


def test_DBAPISet_set_equality_membership():
    assert FIELD_TYPE.VAR_STRING == STRING


def test_DBAPISet_set_inequality_membership():
    assert FIELD_TYPE.DATE != STRING


def Binary(x):
    return bytes(x)


def Connect(*args, **kwargs):
    """Factory function for connections.Connection."""
    from MySQLdb.connections import Connection

    return Connection(*args, **kwargs)


connect = Connection = Connect

__all__ = [
    "BINARY",
    "Binary",
    "Connect",
    "Connection",
    "DATE",
    "Date",
    "Time",
    "Timestamp",
    "DateFromTicks",
    "TimeFromTicks",
    "TimestampFromTicks",
    "DataError",
    "DatabaseError",
    "Error",
    "FIELD_TYPE",
    "IntegrityError",
    "InterfaceError",
    "InternalError",
    "MySQLError",
    "NUMBER",
    "NotSupportedError",
    "DBAPISet",
    "OperationalError",
    "ProgrammingError",
    "ROWID",
    "STRING",
    "TIME",
    "TIMESTAMP",
    "Warning",
    "apilevel",
    "connect",
    "connections",
    "constants",
    "converters",
    "cursors",
    "debug",
    "get_client_info",
    "paramstyle",
    "string_literal",
    "threadsafety",
    "version_info",
]