core_lesson3

Lesson 3 - Discovering you Paths

Ch2 Comparison Operators

• Comparison operators
  • Greater than >
  • Less than <
  • Equal to ==
  • Not equal to !=
  • Greater or equal to >=
  • Less or equal to <=
• Special cases
  • 1.1 + 2.2 != 3.3 (floating approximation values)
  • False < True (0 < 1)
  • "10" != 2 (can compare objects of different type, no error)
  • "B" < "b" (Capital < lowercase)

Ch3 If Statements

• Compound statement
  • Multiple simple statements inside the statement
• Indentation
  • 4 spaces or 1 tab
  • Don't mix them
• Multi-way selection
  • if-elif-else statements

Ch6 Function Calls

• Takes some input, produces an output
• To use a function, we need to know
  • Name
  • What it does
  • Arguments (inputs)
  • Return (output)
• Importing modules
  • Keyword import

Ch8 Composition and Abstraction

• Composition
  • Using a block of code inside another block
  • To achieve a larger goal
• Abstraction
  • Giving block names
  • Allow for reusable and self-explanatory code

Ch9 Incremental Development

• Testing
  • Always test while developing
• pass
  • Do nothing
  • Use when the inside bits aren't implemented yet
• NO true random
  • Reproduce experiment results
    • Making random numbers repeatable with the same seed
  • Always use a seed number in AI/ML projects

Ch10 Commenting

• Readability
  • Helps to understand the code
• Commenting out codes
  • Temporarily remove code without deleting it
  • Should be removed when complete
• Multi-line comments aren't actually comments
  • ''' is a string literal'''
• Conventions
  • Useful / informative
  • Easy to understand
• Docstrings
  • First line of comment is inline with starting """
  • Ending """ should be on a line on its own