django errors

the article records the troublesome errors I met when I use Django framwork.they all cost me some time to look for solutions on Google, StackOverflow and etc. I wish it will help someone with same issue :)

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Error one
configure the mysql database

django.db.utils.OperationalError: (1045, "Access denied for user 'root'@'localhost' (using password: NO)")

this is my settings.py

DATABASES = {
    'default': {
    "ENGINE" : "django.db.backends.mysql",
    "USER" : "test_user",
    "PASSWORD ": '277435',
    "HOST" : '127.0.0.1',
    "NAME" : "test",
    "PORT":"3306"
}
}

it's because "PASSWORD ",there is a extra blank pace traling at this field. django cannot find the password.

remove the trailing blank