I used jira python api to login and change the state of jira issue, or do other things. I want to know is there a token based approach that user will not have to enter password again and again !
There is no "Python" API in Jira, there is a REST API you can call from any language. If you use a library like "jira-python" you can read the docs here regarding authentication.
If you use Jira on-premise check this documentation page regarding authentication, you can use the cookie-based authentication.
If you use Jira cloud check this documentation page regarding authentication with tokens.