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This video is based on Matt Harrison's book: How Python Works. The information in the video is suitable for beginners who want to understand a little about how Python is organized behind the code. 0:00 introduction 0:53 objects, their common properties: identifier, type, size, reference count 4:35 immutable objects 6:43 balance between the cost of object lookup and object creation 9:00 mutable objects 10:27 shallow and deep copies 13:30 representation of floating-point numbers 15:16 dir(), help() functions - to help the developer 17:43 special value: None 19:17 default parameters 22:56 interaction between Python and the operating system when working with files 24:45 file object and its buffer 28:52 namespaces 32:24 modules, packages, libraries