FAQ: Introduction to NumPy - Logical Operations with Arrays

This community-built FAQ covers the “Logical Operations with Arrays” exercise from the lesson “Introduction to NumPy”.

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This exercise can be found in the following Codecademy content:

Data Science

Introduction to Statistics with NumPy

FAQs on the exercise Logical Operations with Arrays

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Please help me solve this mystery:

just_right=porridge[(porridge>60) & (porridge<80)]
just_right=porridge[porridge>60 & porridge<80]

first line works just fine.
second line yields a Value error:

ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()

What does it mean? What is happening with the parentheses that beats the error down?

1 Like

To do so, we place each statement in parentheses…

Sounds like a syntax requirement owing to the nature of the operations within the array.