Flask 的常用模块和命令
本文最后更新于:July 27, 2024 8:58 PM
本健忘症晚期患者自用
模块
Basebones App
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| from flask import Flask app = Flask(__name__)
@app.route('/hello') def hello(): return 'Hello, World!' if __name__ == '__main__': app.run(debug=True)
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Routing
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| @app.route('/hello/<string:name>, methods=['GET', 'POST']) def hello(name): return 'Hello ' + name + '!'
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Templates
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| return render_template('template_file.html', val1 = value1, ...)
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JSON Responses
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| import jsonify
@app.route('/returnstuff') def returnstuff(): num_list = [1,2,3,4,5] num_dict = {'numbers' : num_list, 'name' : 'Numbers'} return jsonify({'output' : num_dict})
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Access Request Data
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| request.args['name'] request.form['name'] request.method request.cookies.get('cookie_name') request.files['name']
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Redirect
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| return redirect(url_for('index'))
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命令
Create virtual environment locally
Activate virtual environment
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| source env/Scripts/activate
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Create database
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| $ python >>> from app import db >>> db.create_all()
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部署
用的 Heroku
Freeze requirements
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| pip freeze > requirements.txt
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Procile
Get postgresql
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| heroku addons:create heroku-postgresql:hobby-dev --app [appname]
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Get datatbase url
Remember to change postgres://...
to postgresql://...