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Unit 1 · Data in Plain Python

Rows, records, files and summaries, using nothing but the standard library.

  1. 1What Data Analysis Actually IsFour steps that turn a file of rows into an answer you can defend.
  2. 2Rows and Columns with ListsA table is a list of lists, and a column is what you pull out of it.
  3. 3Records as DictionariesName the columns, and the code stops depending on their order.
  4. 4Reading a CSV FileThe csv module turns a file of text into rows you can work with.
  5. 5Summarising NumbersTotals, averages and extremes, and what each one hides.
  6. 6Counting and GroupingA dictionary is how you count things, and how you split a table into groups.