AttributeError: 'str' object has no attribute 'isoformat'

[devopjj]

I just learn how to post new from md file and set up the post date, but I got errors:
env:
python3.7,pip 20.0.2

$ easyblogger post -t 'Hello World3' -l 'test1' -c 'Hello Test' --date "2018-04-30T12:42:00+05:30"
Traceback (most recent call last):
File "/usr/local/bin/easyblogger", line 8, in
sys.exit(main())
File "/usr/local/lib/python3.7/site-packages/blogger/main.py", line 291, in main
return runner(args)
File "/usr/local/lib/python3.7/site-packages/blogger/main.py", line 378, in runner
return processItem(args)
File "/usr/local/lib/python3.7/site-packages/blogger/main.py", line 306, in processItem
publishDate=args.publishDate)
File "/usr/local/lib/python3.7/site-packages/blogger/blogger.py", line 246, in post
blogPost["published"] = publishDate.isoformat()
AttributeError: 'str' object has no attribute 'isoformat'

[khoguan]

Hello, I have the same issue.