The Python Journeyman
The Python Journeyman
About the Book
The Python Journeyman is the second book in our trilogy covering the core Python language. The material in these books is derived from Sixty North's popular and battle-tested training courses which have led thousands of programmers on a journey to being productive with Python.
Our books, which use Python 3, follow a spiral curriculum: We introduce topics gently and then revisit them on multiple occasions to add the depth required to support your progression as a Python developer. We've worked hard to structure the syllabus to avoid forward references. On only a few occasions do we require you to accept techniques on trust, before explaining them later; where we do, it's to deliberately establish good habits.
- Errata and Suggestions
- Conventions Used in This Book
- Welcome Journeyman!
- A functioning Python 3 runtime
- Defining function, passing arguments, and returning values
- Creating, importing and executing modules
- Built-in types: Integers, Floats, Strings, Lists, Dictionaries and Sets
- Fundamentals of the Python object model
- Raising and handling exceptions
- Iterables and iterators
- Defining classes with methods
- Reading and writing text and binary files
- Unit testing, debugging and deployment
- Well begun is half done
Chapter 1 - Organizing Larger Programs
- Implementing packages
- Relative imports
- Namespace packages
- Executable directories
- Executable packages
- Recommended layout
- Modules are singletons
Chapter 2 - Beyond Basic Functions
- Review of Functions
- Functions as callable objects
Callable instances and the
- Classes are Callable
- Leveraging callable classes
- Detecting Callable Objects
- Extended Formal Parameter Syntax
- Extended Call Syntax
- Transposing Tables
Chapter 3 - Closures and Decorators
- Local functions
- Closures and nested scopes
- Function decorators
- Validating arguments
Chapter 4 - Properties and Class Methods
- Class attributes
- Static methods
- Class methods
- Named constructors
- Overriding static- and class-methods
- Overriding properties
- The template method pattern
Chapter 5 - Strings and Representations
- Two string representations
Strings for developers with
Strings for clients with
- When are the representation used?
Precise control with
reprlibfor large strings
- Case study: String representations of tabular data
Chapter 6 - Numeric and Scalar Types
- Python’s basic numeric types
- The limits of floats
- The decimal module
- The fractions module
- Complex Numbers
- Built-in functions relating to numbers
- Dates and times with the datetime module
- Case study: Rational numbers and computational geometry
Chapter 7 - Iterables and Iteration
- Review of comprehensions
- Multi-input comprehensions
- Functional-style tools
- Combining functional concepts: map-reduce
- The iteration protocols
- Case study: an iterable and iterator for streamed sensor data
Chapter 8 - Inheritance and Subtype Polymorphism
- Single inheritance
- Type inspection
- Multiple inheritance
- MRO: Method Resolution Order
- Inheritance for Implementation Sharing
Chapter 9 - Implementing Collections with Protocols
- Collection protocols
- Test first
- The initializer
- The container protocol
- The sized protocol
- The iterable protocol
- The sequence protocol
- The set protocol
Chapter 10 - Errors and Exceptions in Depth
- Exception dangers
- Exceptions hierarchies
- Exception payloads
- User-defined exceptions
- Exception chaining
- Preconditions, postconditions and assertions
Chapter 11 - Defining Context Managers
- What is a context manager?
- The context manager protocol
- Multiple context-managers in a with-statement
- Context managers for transactions
Chapter 12 - Introspection
- Introspecting types
- Introspecting objects
- Introspecting scopes
- An object introspection tool
- Afterword: Levelling Up
- Appendix A - Python implementation of ISO6346
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