KAS20 will be a 2-week astrophysics school on â€˜Introduction to Astronomical Data Analysis â€˜, targeting 25 advanced undergraduate students from Nepal (~80%) and abroad (~20%). The first week of the school will cover programming basics in â€˜An Introduction to Pythonâ€™ in order to ensure students develop the necessary skills to tackle the subject matter in the second week. The overall theme flows seamlessly from â€˜Computational Techniquesâ€™ and â€˜Order of Magnitudeâ€™, the themes from KAS16 and KAS18, respectively. Academic lectures are complemented by supervised hands-on group projects for optimal active learning, and by science education/professional skill development seminars. KAS20 builds upon two previous editionsin 2016 at Tribhuvan University (KAS2016) and in 2018 at Narayan Campus in Pokhara (KAS18), which resulted in long-term impact, as measured for example through subsequent enrolment of alumni inpostgraduate degrees in Europe and their participation to summer schools abroad. KAS20 will continue to mentor and upskill a new generation of undergraduate Nepali students in both professional and academic areas through engagement with a highly-qualified international faculty. Special focus is given to diversity and gender equity, reflected in the SOC/faculty composition, with active efforts to solicit qualified female applicants. Lodging and meals are provided to all students to maximize equality, collegiality and networking. KAS20 is the third in a long-term series of for a profound, positive impact on the Nepali educational system and society, and will cement the growing professional collaboration between international lecturers and local Nepali academics.