Python help

To be able to attempt the GCSE NEA you need the following Python skills:

• Input from keyboard

• Output to display

• Decisions (IF...THEN...ELSE...)

• Essential functions: modulus (%), ASC, ORD

• Use of data types: integer, real, Boolean, character, string, casting

• String manipulation

• Common arithmetic operators (+, -, /, *, MOD, DIV)

• Common Boolean operators (NOT, AND, OR)

• Pro-Coder Rule #1: Use descriptive names for variables and sub-routines

• Use of common libraries

To achieve higher than level 4, you will also need the following Python skills:

• Pro-Coder Rule #2: Convert repeated instructions into loops (condition and counter)

• Pro-Coder Rule #3: Convert repeated functionality into sub-routines

• Defensive design considerations: data input sanitation and validation, planning for contingencies, anticipating misuse

• Arrays or lists

• Read and write to CSV files

• A search and sort algorithm

What is the difference between code (up to level 4), and good code (level 5+)?

Good code is:

• Readable - someone else can understand it

• Maintainable - code can easily be updated and added to

• Robust and defensive - code can deal with garbage