从烧瓶运行python脚本

Question

我有一个 python 脚本 (script.py)，当我在控制台中运行它时，它会不断接收 JSON 格式的数据，现在我想在网页上可视化控制台的输出或能够执行script.py 并捕获输出以在浏览器中查看，根据我所阅读的内容，我了解使用 FLASK 我可以做到这一点，一个示例或指南来实现它。

from flask import Flask

app = Flask(__name__)

@app.route("/")
def code():
    out = open(r'output.py', 'r').read()
    return exec(out)

if __name__ == '__main__':
    app.run(host='0.0.0.0')

///////////////////////////////////////

builtins.RuntimeError

RuntimeError：线程 'Thread-9' 中没有当前事件循环。 Traceback（最近一次通话最后一次）

File "..//python3.6/site-packages/flask/app.py", line 2301, in __call__

return self.wsgi_app(environ, start_response)

File "..//python3.6/site-packages/flask/app.py", line 2287, in wsgi_app

response = self.handle_exception(e)

File "..//python3.6/site-packages/flask/app.py", line 1733, in handle_exception

reraise(exc_type, exc_value, tb)

File "..//python3.6/site-packages/flask/_compat.py", line 35, in reraise

raise value

File "..//python3.6/site-packages/flask/app.py", line 2284, in wsgi_app

response = self.full_dispatch_request()

File "..//python3.6/site-packages/flask/app.py", line 1807, in full_dispatch_request

rv = self.handle_user_exception(e)

File "..//python3.6/site-packages/flask/app.py", line 1710, in handle_user_exception

reraise(exc_type, exc_value, tb)

File "..//python3.6/site-packages/flask/_compat.py", line 35, in reraise

raise value

File "..//python3.6/site-packages/flask/app.py", line 1805, in full_dispatch_request

rv = self.dispatch_request()

File "..//python3.6/site-packages/flask/app.py", line 1791, in dispatch_request

return self.view_functions[rule.endpoint](**req.view_args)

File "/usr/share/server/www/test/index1.py", line 9, in dynamic_page

return exec(file)

File "<string>", line 60, in <module>

/////////////////////////////////////// ///////////////////////// 输出.py

#!/usr/bin/env python3

导入 json 导入系统

从手机导入Runn、BReporter、EventHandler

类 NoOpEventHandler(EventHandler)：

def on_event(self, event):
    self._reporter.on_event(event)

类 VerboseNoOpEventHandler(NoOpEventHandler)：

FILTER_EVENTS = False

类 JsonReporter(BReporter)：

def __init__(self):
    self._has_first_line = False

def on_event(self, event):

    json_data = json.dumps(dict(event), sort_keys=True)

    if self._has_first_line:
        sys.stdout.write(',')
    else:
        sys.stdout.write('[')
        self._has_first_line = True

    sys.stdout.write('\n  {}'.format(json_data))

def close(self):
    sys.stdout.write('\n]')

reporter = JsonReporter()

跑步者=跑步（[ 'tcp://test123:test123@127.0.0.1:5038', ]，记者，处理程序=NoOpEventHandler) runner.run()

Answer 1

就用这个吧；你必须设置debug = True。您不必提供主机进行测试。

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

你应该会在终端上看到类似的输出；

* Serving Flask app "my_flask_app" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: xxx-xxx-xxx
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

打开网络浏览器并复制粘贴：http://127.0.0.1:5000/

Answer 2

我将您的代码保存在tmp.py 中，并以python tmp.py 运行。

from flask import Flask

app = Flask(__name__)

@app.route("/")
def code():
    out = open(r'output.py', 'r').read()
    return exec(out)

if __name__ == '__main__':
    app.run(debug = True)

运行如下：

   (flaskvenv) C:...>python tmp.py

这是输出：

* Serving Flask app "tmp" (lazy loading)
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: on
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: XXX-XXX-XXX
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)

这意味着代码运行。您可能还有其他问题！

Answer 3

我认为问题出在 exec(out) 上。实际上，exec是一个程序的动态执行，可以是字符串也可以是目标代码，它不返回任何东西，它只是执行一个程序并返回None。

如果您在不尝试返回 exec(out) 的情况下运行代码，则不会出错。