import sqlite3
from contextlib import closing

class	hiraDB:
	#---------------------------------------
	# 
	#---------------------------------------
	def __init__(self, dbname = 'test.db'):
		self.dbname = dbname
		self.conn	= None
	#---------------------------------------
	#	前
	#---------------------------------------
	def __enter__(self):
		#print("before(__enter__)")
		return self
	#---------------------------------------
	#	後
	#---------------------------------------
	def __exit__(self, exc_type, exc_value, traceback):
		if self.conn != None:
			self.close()
		#print("after(__exit__)")
	#---------------------------------------
	#	open
	#---------------------------------------
	def open(self,dbname=None):
		if dbname != None:
			dn = dbname
		else:
			dn = self.dbname
		try:
			self.conn = sqlite3.connect(dn)
		except Exception as e:
			return	False
		return	True
	#---------------------------------------
	def close(self):
		self.conn.close()
	#---------------------------------------
	def commit(self):
		self.conn.commit()
	#---------------------------------------
	def execSQL(self,sql,dat=None):
		if self.conn == None:
			return	False
		try:
			c = self.conn.cursor()
			if dat != None:
				a = c.execute(sql,dat)
			else:
				a = c.execute(sql)
		except Exception as e:
			return	False
		return	a
	#---------------------------------------
	def execSQLone(self,sql,dat=None):
		a = self.execSQL(sql,dat)
		b = a.fetchone()
		return	a,b
	#---------------------------------------
	def execSQLall(self,sql,dat=None):
		a = self.execSQL(sql,dat)
		b = a.fetchall()
		return	b
	#---------------------------------------
	#with hiraDB() as A:

if __name__ == '__main__':
	with hiraDB() as A:
		a = A.open("/?*a\\%4'")
		print("ret:",a)
		if a == False:
			A.open()
		#a = A.execSQLall('select * from T_user')
		a,b = A.execSQLone('select * from T_user')
		#a = A.execSQLone('select count(*) as hira from T_user')
		print("-------")
		print(b)
		print(len(b))
		print(b[2])
		print("-------")
		print(a.fetchone())
		print(a.fetchone())

ret: False
-------
(1, 'hiraide', 'passMD', 0, 1583326080, 1583326080, None, None)
8
passMD
-------
(2, 'hiraide2', 'passMD', 0, 1583326153, 1583326153, None, None)
(3, 'hiraide3', 'passMD', 0, 1583326356, 1583326356, None, None)