Organizing Programs

Map

Arrows point from what you learn first to what it opens. Point at a concept to light up its chain and where it comes back deeper. Right-click a concept (or press and hold it) for its lessons and stories.

Proven to depth123
Open
Locked
Comes back deeper

Files in code Modules and imports StringsIn Data Types ExceptionsIn Writing Correct Code Functions in codeIn Functions

Learning path

In the order the concepts build on each other.

Modules and importsLockedSplitting a program into files that others can import, so a function is written once and used everywhere - plus the standard library that comes with Python and the packages others share.Opens after: Functions in code
Files in codeLockedReading and writing files, so a program can keep data after it stops - open with a mode, with to close it, lines read one by one, and the csv module for tables.Opens after: Strings, Exceptions, Modules and imports

Connections to other domains

Files in code needs StringsData Types
Files in code needs ExceptionsWriting Correct Code
Modules and imports needs Functions in codeFunctions