what is a dictionary?

A dictionary also known as a Mapping is a way to keep key-value pairs, the values can be any Python object. I add tests to see which of the Python basic data types I can use as keys .

I think this is the most important data structure because it can hold all the other data structures, same as with lists and tuples but with more. In programming I have had to work with JSON which I can read and write as dictionaries

the chapters

dictionaries
how to make a calculator part 6

code from the chapter

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what is next?

you know

how to make a test driven development environment manually
how to raise AssertionError with assert methods
how to write functions
how to pass values from tests to functions
what None is
what is True and False in Python
how to write programs that make decisions
how to make a calculator
how to test that an Exception is raised with assertRaises
how to handle Exceptions in programs with try…except…else
how to raise TypeError
how to make the calculator check if its inputs are numbers
what you can do with Lists

Would you like to test list comprehensions? They are a quick way to make lists

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booleans part 2

dictionaries