Connect to sql server using Python

I am just writing a simple python script to connect to sql server .  SQL server that  I am trying to connect does not have trusted connection and so i have to login using integrated authentication. so in my script  i  try to login using the username and password that i use to login into management studio. but when i execute the script it gives me an error message saying login failed for user "it shows my windows username" and just ignores the username that I am passing in my script.
Below is my script.


server = "xxxxxxx.svr.us.xxxxxx.net\\Servername"
database = "MyDatabase"
username = "username"
password = "password"

con = pyodbc.connect('DRIVER={SQL Server};Server='+server+';Database='+database+';username='+username+';password='+password)
print (con)
con = conStr
cur = con.cursor()   #Generates error on this line
cur.execute("SELECT top 10 * from mytable;")

error that i get

pyodbc.Error: ('28000', "[28000] [Microsoft][ODBC SQL Server Driver][SQL Server]Login failed for user 'OVER HERE I SEE MY WINDOWS USERNAME. (18456) (SQLDriverConnect)")