4
python3을 사용하면 pymysql을 사용하여 mysql에 연결할 수 있습니다. 모두 예상대로 작동합니다. 동봉 된 코드가 작동합니다.python3 sqlalchemy pymysql 연결 문자열
import pymysql
conn = pymysql.connect(host='127.0.0.1', unix_socket='/home/jhgong/mysql/tmp/mysql.sock', user='root', passwd='my_pass', db='my_db', port='3333')
cur = conn.cursor()
cur.execute('select user from auth_users')
for i in cur:
print(i)
sqlalchemy와 pymysql을 연결하려고하면 기본 예제 문자열이 작동하지 않는 것 같습니다. 위의 예는 포트 번호와 unix_socket을 모두 선언하지 않으면 작동하지 않습니다.
아래에 제가 sqlalchemy를 연결하려고 시도했습니다. 소켓과 포트 번호가 모두 필요하다고 가정합니다. 나는 여분의 unix_socket 위치를 가진 해시로 피드하기 위해 connect_args를 사용했다. 기쁨이 없다.
동봉 된 snippit을 사용하면 오류가 발생합니다. 또는 나는 다음과 같은 오류가 conarg 해시의 데시벨없이
conarg = {
'unix_socket':'/home/jhgong/mysql/tmp/mysql.sock',
'db' :'ice'
}
engine = create_engine('mysql+pymysql://root:[email protected]:3333/my_db', connect_args = conarg, echo=True)
connection = engine.connect()
는 :
>>> connection = engine.connect()
2013-01-17 13:04:20,819 INFO sqlalchemy.engine.base.Engine b'SELECT DATABASE()'
2013-01-17 13:04:20,819 INFO sqlalchemy.engine.base.Engine()
Traceback (most recent call last):
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/pool.py", line 724, in _do_get
return self._pool.get(wait, self._timeout)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/util/queue.py", line 163, in get
raise Empty
sqlalchemy.util.queue.Empty
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/base.py", line 1574, in connect
return self._connection_cls(self, **kwargs)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/base.py", line 58, in __init__
self.__connection = connection or engine.raw_connection()
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/base.py", line 1637, in raw_connection
return self.pool.unique_connection()
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/pool.py", line 182, in unique_connection
return _ConnectionFairy(self).checkout()
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/pool.py", line 398, in __init__
rec = self._connection_record = pool._do_get()
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/pool.py", line 744, in _do_get
con = self._create_connection()
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/pool.py", line 187, in _create_connection
return _ConnectionRecord(self)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/pool.py", line 284, in __init__
exec_once(self.connection, self)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/event.py", line 362, in exec_once
self(*args, **kw)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/event.py", line 379, in __call__
fn(*args, **kw)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/strategies.py", line 168, in first_connect
dialect.initialize(c)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/dialects/mysql/base.py", line 2005, in initialize
default.DefaultDialect.initialize(self, connection)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/default.py", line 183, in initialize
self._get_default_schema_name(connection)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/dialects/mysql/base.py", line 1970, in _get_default_schema_name
return connection.execute('SELECT DATABASE()').scalar()
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/base.py", line 645, in execute
params)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/base.py", line 791, in _execute_text
statement, parameters
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/base.py", line 854, in _execute_context
context)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/SQLAlchemy-0.8.0b1dev-py3.2.egg/sqlalchemy/engine/default.py", line 342, in do_execute
cursor.execute(statement, parameters)
File "/nfs/site/home/jhgongx/.local/lib/python3.2/site-packages/PyMySQL3-0.5-py3.2.egg/pymysql/cursors.py", line 105, in execute
query = query % escaped_args
TypeError: unsupported operand type(s) for %: 'bytes' and 'tuple'
비어 풀 큐에 오류가 제기 될 것으로 보인다. 풀 대기열의 크기 나 유형을 설정해도 아무 효과가 없습니다.
이것을 알아내는 방법에 대한 제안 사항은 무엇입니까? 파이썬 3
import sqlalchemy
from sqlalchemy.sql import select
from sqlalchemy import Table, MetaData
def init():
try:
server = 'xx'
db = 'xx'
login = 'xx'
passwd = 'xx'
engine_str = 'mysql+mysqlconnector://{}:{}@{}/{}'.format(login, passwd, server, db)
engine = sqlalchemy.create_engine(engine_str, echo=False, encoding='utf-8')
connection = engine.connect()
metadata = MetaData()
t_servers = Table('your_table_here', metadata, autoload=True, autoload_with=engine)
s = select([t_servers])
result = connection.execute(s)
for row in result:
print(row['the_field'])
except Exception:
raise
finally:
connection.close()
if __name__ == '__main__':
init()
MySQL의 커넥터 :