There are two summer school on text analysis using Python this year. From the 22nd July to the 1st August is Joint Culture & Technology and CLARIN-D Summer School in Leipzig. I have been at this summer school a few years ago. It was great, many people, great atmosphere, and Leipzig is a lovely place. Anyway, this year they have a module on Python for text analysis: Advanced Topics in Humanities Programming with Python.
The second summer school is DARIAH International Digital Humanities Summer School in Göttingen, from 17th to 30th August. They also do a module on Python for text analysis. I have been there last year and it was great. The instructors were fantastic and we learned a lot. Would definitely recommend it.