Python - MySql mensaje de conexion

import _mysql

try:

	db=_mysql.connect(host="localhost",user="all", passwd="all")

except:

	print "Error en la conexion"

import pyodbc

import pandas.io.sql as pd

conn = pyodbc.connect('DRIVER={SQL Server};SERVER=MSI\SQL2014;DATABASE=Central;UID=sa;PWD=1')

sql="Select top 100 IdActivo,Open1,High,Low from DATA"

df = pd.read_sql(sql,conn)

df.head(1000)

conn.close()