Flask: OSError: [Errno 98] 地址已使用 - 但为什么？

我有一个非常简单的代码：

from flask import Flask



app = Flask/__name__/



if __name__ == '__main__':

 app.run/debug=True/

我第一次推出它，他工作了，然后 ctrl+c 没工作，所以我刚刚杀了 python terminal 他自己。 然后我试图再次运行并遇到错误：

* Serving Flask app "untitled1" /lazy loading/

 * Environment: production

 WARNING: Do not use the development server in a production 

 environment.

 Use a production WSGI server instead.

 * Debug mode: on

 Traceback /most recent call last/:

 File "<stdin>", line 1, in <module>

 File "/usr/lib/python3/dist- 

 packages/spyderlib/widgets/externalshell/sitecustomize.py", line 699, 

 in runfile

 execfile/filename, namespace/

 File "/usr/lib/python3/dist- 

 packages/spyderlib/widgets/externalshell/sitecustomize.py", line 88, 

in execfile

exec/compile/open/filename, 'rb'/.read//, filename, 'exec'/, 

namespace/

File "/home/teoman/Desktop/flaskapp/untitled1.py", line 13, in 

<module>

app.run/debug=True/

File "/home/teoman/.local/lib/python3.5/site-packages/flask/app.py", 

line 943, in run

run_simple/host, port, self, **options/

File "/home/teoman/.local/lib/python3.5/site- 

packages/werkzeug/serving.py", line 795, in run_simple

s.bind/get_sockaddr/hostname, port, address_family//

OSError: [Errno 98] Address already in use

我找到了类似的问题，但我无法理解他们，因为解决方案也很困难，我在申请中很新 Flask /例如，十分钟/, 我用 Linux Mint MATE.

NOTE: localhost:5000 它可以很好，但我没有命令行 python, 开放式应用程序 Flask.
</module></module></stdin>