James Powell: So you want to be a Python expert? | PyData Seattle 2017

www.pydata.org PyData is an educational program of NumFOCUS, a 501(c)3 non-profit organization in the United States. PyData provides a forum for the international community of users and developers of data analysis tools to share ideas and learn from each other. The global PyData network promotes discussion of best practices, new approaches, and emerging technologies for data management, processing, analytics, and visualization. PyData communities approach data science using many languages, including (but not limited to) Python, Julia, and R. PyData conferences aim to be accessible and community-driven, with novice to advanced level presentations. PyData tutorials and talks bring attendees the latest project features along with cutting-edge use cases. 0:00 About PyData and being proficient in Python 4:09 Important features of Python and audience survey 7:40 Data model methods 10:14 _init_ method 11:15 _repr_ method 12:17 _add_ method 15:51 _len_ method 18:42 _call_ method 20:50 Metaclasses and the problem of writing safe library code 27:00 Contraints on the library code using assert 32:33 Compile-time vs run time executable code 34:42 Disassembling class code and using _build_class_ 40:26 Constraining library code with the metaclass pattern 47:22 Introducing decorators 49:07 Code inspection 57:36 Writing a timer function 59:42 Decorator syntactic sugar 1:03:00 Writing a ntimes decorator 1:06:32 Wrapping functions into class 1:10:51 Eager execution 1:14:02 _iter_ and _next_ methods 1:17:40 yield and the Generator syntax 1:20:35 Coroutines and interleaving 1:24:35 Context Managers 1:25:30 Setup and teardown of resources 1:28:38 Applying to SQL transactions 1:30:10 _enter_ and _exit_ methods 1:32:30 Links between generators and context managers 1:36:02 Refactoring the SQL query code 1:37:52 Wrapping up 1:40:04 Opinions on writing clear code in Python 1:48:18 Q&A S/o to https://github.com/mycaule for the video timestamps! Want to help add timestamps to our YouTube videos to help with discoverability? Find out more here: https://github.com/numfocus/YouTubeVi...