flask open debug four models

flask open debug four models

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• In app.run added a parameter (), 'debug = True' can turn on debug mode

  from flask import Flask
  
  app = Flask(__name__)
  
  
  
  @app.route('/')
  def hello_world():
      return 'Hello World!'
  
  
  if __name__ == '__main__':
      app.run(debug=True)

• The debug attribute assignment app is True

   1 from flask import Flask
   2 
   3 app = Flask(__name__)
   4 app.debug = True
   5 
   6 
   7 @app.route('/')
   8 def hello_world():
   9     return 'Hello World!'
  10 
  11 
  12 if __name__ == '__main__':
  13     app.run()

• Debug mode is provided in the form of configuration parameters: 'app.config.update (DEBUG = True)'

   1 from flask import Flask
   2 
   3 app = Flask(__name__)
   4 app.config.update(DEBUG=True)
   5 
   6 
   7 @app.route('/')
   8 def hello_world():
   9     return 'Hello World!'
  10 
  11 
  12 if __name__ == '__main__':
  13     app.run()

• DEBUG mode setting configuration file in the form of 'app.config.from_object (config)'
  • New config file
    • Write to
      • DEBUG = True

  •  1 from flask import Flask
     2 import config
     3 app = Flask(__name__)
     4 app.config.from_object(config)
     5 
     6 
     7 @app.route('/')
     8 def hello_world():
     9     return 'Hello World!'
    10 
    11 
    12 if __name__ == '__main__':
    13     app.run()

 　　　　　　from_object can be replaced from_pyfile from_pyfile pass a filename string

 

Flask 1.0 versions prior to FLASK_ENV environment variable is no longer supported

Open two ways to debug:

　　1:  Click pycharm the run, select edit configuration, check FlASK_DEBUG, then take a debug mode can be turned on

　　2: Command line:

　　　　　　　　export FLASK_ENV=development # Windows将export 换成 set

　　　　　　　　flask run