Analytics Open Learning

Strings and String Methods

Objectives ⟶

  • Recap the list data type and for loops.

  • Learn how to add, concatenate, and slice lists.

  • Discuss the string(str) data type.

  • See why strings are similar to lists.

  • Learn string utility methods.

More Collection Exercises

Collections (list and dict) are very important when working with data. Here are a few more exercises in case you need to grasp the concepts one more time.

Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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Slicing a List

Select Subset

In Python, you can easily slice and retrieve a subset of a list using the slice notation. The basic syntax is my_list[start:stop] where my_list is a list-like value (or a variable). start and stop specify the index where you would like to start/stop retrieving values.

Slicing

  • my_list[start:stop] retrieves all values from start to stop - 1.
  • my_list[start:] retrieves all values from start to the end of the list.
  • my_list[:stop] retrieves all values from the beginning to stop - 1.
  • my_list[:] retrieves all values from the list. This is often used to create a shallow copy of a list.
Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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A string in Python is simply a list of characters.

Python Challenge

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Python Challenge

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Python Challenge

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Python Challenge

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