从flask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，它一直以JSON格式接收数据，现在我想在网页上可视化控制台的输出，或者能够执行script.py并捕获输出以在浏览器中查看，从我所读到的内容来看，我理解使用FLASK我可以做到这一点，这是实现它的一个示例或指南。

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')

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

内置。运行时错误

RuntimeError:线程"thread-9"中没有当前事件循环。追踪(最近一次通话(

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、BReport、EventHandler

类NoOpEventHandler(EventHandler(:

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

类VerboseNoOpEventHandler(NoOpEventHandler(:

FILTER_EVENTS = False

class JsonReporter(B报表(：

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((

runner=跑步(['tcp://test123:test123@127.0.0.1:5038’，]，reporter，handler=NoOpEventHandler(runner.run((

Answer 1

只需使用此；必须设置debug = True。您不必为测试提供主机。

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

您应该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web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，并将其作为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)

按如下方式运行：

(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)

这意味着代码会运行。你可能还有其他问题！

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，它可以是字符串，也可以是对象代码，它不返回任何东西，它只是执行一个程序并返回None。

如果您运行代码而不尝试返回exec(out(，则不会出现错误。