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import pymysql
def create_db(hostname="localhost", port=3306, username=None, password=None, dbname=None):
"""Create test database.
:param hostname: string
:param port: int
:param username: string
:param password: string
:param dbname: string
:return:
"""
cn = pymysql.connect(
host=hostname, port=port, user=username, password=password, charset="utf8mb4", cursorclass=pymysql.cursors.DictCursor
)
with cn.cursor() as cr:
cr.execute("drop database if exists " + dbname)
cr.execute("create database " + dbname)
cn.close()
cn = create_cn(hostname, port, password, username, dbname)
return cn
def create_cn(hostname, port, password, username, dbname):
"""Open connection to database.
:param hostname:
:param port:
:param password:
:param username:
:param dbname: string
:return: psycopg2.connection
"""
cn = pymysql.connect(
host=hostname, port=port, user=username, password=password, db=dbname, charset="utf8mb4", cursorclass=pymysql.cursors.DictCursor
)
return cn
def drop_db(hostname="localhost", port=3306, username=None, password=None, dbname=None):
"""Drop database.
:param hostname: string
:param port: int
:param username: string
:param password: string
:param dbname: string
"""
cn = pymysql.connect(
host=hostname, port=port, user=username, password=password, db=dbname, charset="utf8mb4", cursorclass=pymysql.cursors.DictCursor
)
with cn.cursor() as cr:
cr.execute("drop database if exists " + dbname)
close_cn(cn)
def close_cn(cn=None):
"""Close connection.
:param connection: pymysql.connection
"""
if cn:
cn.close()
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