Saudi Arabia has taken precedence in technological development as one of the cornerstones of the Vision 2030 strategy. The growing threat of cybersecurity has prompted the kingdom to pay more attention to its national cybersecurity strategy as the state embarks on a Vision 2030 plan, which aims to diversify the economy and create new jobs. Therefore, Any Computer system is always having security threats which considered as a big problem and this including application Codes. Recently, interest in cybercrime and cybersecurity has increased dramatically both in terms of critical security issues and national economic information infrastructure and sensitive dealing policies, such as protection and data privacy. The project aims to present security guidelines and considerations in different Python discipline. The project gives a detailed information about secure coding with Python. It focuses on develop a sample of application (Code) - as a case study and how to program a security mistakes to introduce vulnerabilities, beside adding tests for, then fixing them. This will be useful for programmers to keep their codes and applications more secure and viable for usage in sensitive environments.