Using the "not" Boolean Operator in Python

Using the Python not Operator

Howard Francis
Howard Francis 14 Lessons 30m basics python
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Python’s not operator allows you to invert the truth value of Boolean expressions and objects. You can use this operator in Boolean contexts, such as if statements and while loops. It also works in non-Boolean contexts, which allows you to invert the truth value of your variables.

Using the not operator effectively will help you write accurate negative Boolean expressions to control the flow of execution in your programs.

In this course, you’ll learn:

  • How Python’s not operator works
  • How to use the not operator in Boolean and non-Boolean contexts
  • How to use the operator.not_() function to perform logical negation
  • How and when to avoid unnecessary negative logic in your code

What’s Included:

Downloadable Resources:

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Using the Python not Operator

2 Lessons 3m

  1. 1. Using the Python not Operator (Overview)01:41
  2. 2. Working With Boolean Logic01:59

Getting Started With Python's not Operator

3 Lessons 8m

  1. 1. Getting Started With Python's not Operator01:32
  2. 2. Exploring Examples Using not03:07
  3. 3. Using not With Other Boolean Operators04:03

Using not in Boolean and Non-Boolean Contexts

5 Lessons 10m

  1. 1. Using not in Boolean Contexts01:10
  2. 2. Using not in Boolean if Statements03:10
  3. 3. Using not to Determine Range02:03
  4. 4. Using not in Boolean while Loops02:18
  5. 5. Using not in Non-Boolean Contexts02:12

Applying not Operator Best Practices

4 Lessons 7m

  1. 1. Testing for Membership02:32
  2. 2. Checking the Identity of Objects01:11
  3. 3. Avoiding Unnecessary Negative Logic03:12
  4. 4. Using the Python not Operator (Summary)00:36
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About Howard Francis

Howard is an avid Pythonista and records video courses for Real Python. He has been teaching beginning programming at the college level for over 20 years in C++, Java, C#, and most recently Python.

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