TabError: inconsistent use of tabs and spaces in indentation

[OguzBey]

Python 3.7.2 (default, Jan 10 2019, 23:51:51)
[GCC 8.2.1 20181127] on linux
Type "help", "copyright", "credits" or "license" for more information.

from openvas_lib import VulnscanManager
Traceback (most recent call last):
File "", line 1, in
File "/home/oguzbey/Desktop/virtualEnviroments/openvasEnv/lib/python3.7/site-packages/openvas_lib/init.py", line 373
elif l_tag == "severity":
^
TabError: inconsistent use of tabs and spaces in indentation

[OguzBey]

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