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ImportError: cannot import name 'login' from 'django.contrib.auth.views'

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when I runserver，I take the error ImportError: cannot import name 'login' from 'django.contrib.auth.views' .why?

mvn install出现The specified user settings file does not exist: C:\usr\local\maven\maven3.3.9\conf\settings.xml

building failed

1

when I builded the project(mvn package),I see org.apache.spark.SparkException:Only one SparkContext may be running in this JVM(see SPARK-2243).To ignore the error set spark.driver.allowMultipleContexts=true.I set spark.driver.allowMultipleContexts=true,but there is still error.how can I...

模拟器出现Device support x86,but APK only supports armeabi-v7a，怎么解决？

模拟器出现Device support x86,but APK only supports armeabi-v7a