Python for Dummies: How to Avoid List Breaks (The Difference Between a Data Reference and Data)
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Many beginners, and even advanced users, don't understand the difference between data and a reference to data. However, mechanisms for passing and copying references are very actively used in professional code. So here's a video; it will also prepare you for understanding lambda functions and higher-order functions, which will be covered in a video later.
00:00 Introduction
00:58 Student "Broken" Lists
03:31 Two Variables, One List
05:23 Files and Shortcut Files
08:40 Summary
09:44 One List 7 Times