Python Flask 中的语法错误

Question

I have the following code. When I run it, i get the following error:

File "app.py", line 16
    @app.route('/')
    ^
SyntaxError: invalid syntax

When I remove these lines

try:
    tree = ET.parse('export.xml')
    root = tree.getroot()

I do not have the error anymore. I don't understand what is the problem and how can I fix it.

from flask import Flask, render_template
import xml.etree.ElementTree as ET
import requests
import json

app = Flask(__name__)

file = open("/home/ubuntu/flaskapp/export.xml", 'w')
file.write(r.text)
file.close()

try:
    tree = ET.parse('export.xml')
    root = tree.getroot()

@app.route('/')
def hello_world():
    return 'Hello from Flask!'


if __name__ == "__main__":
    app.run()

Answer 1

Added except for try, code works now.

from flask import Flask, render_template
import xml.etree.ElementTree as ET
import requests
import json

app = Flask(__name__)

file = open("/home/ubuntu/flaskapp/export.xml", 'w')
file.write(r.text)
file.close()

try:
    tree = ET.parse('export.xml')
    root = tree.getroot()

except Exception :
    print "The database is stopped!\n"

@app.route('/')
def hello_world():
    return 'Hello from Flask!'


if __name__ == "__main__":
    app.run()