为什么#!flask/bin/python在这段代码的顶部添加了这一行？
from flask import Flask
app = Flask(__name__)
@app.route('/')
def index():
return "Hello, World!"
if __name__ == '__main__':
app.run(debug=True)
我删除它时出现以下错误
from: can't read /var/mail/flask
./app.py: line 3: syntax error near unexpected token `('
./app.py: line 3: `app = Flask(__name__)'