filter()

Our first dip into the FP swimming pool…

filter

 filter (predicate, list)

Returns new list, of the same type as the list being filtered, with possibly fewer items.

	Details
predicate	lambda for True or False evaluation on each item
list	List to filter

My typical examples…

grades = [
    70, 
    55.5, 
    85
]

passing_grades = filter(
    lambda x: x >= 70, 
    grades,
)

print(
    passing_grades
)

<filter object>

Oops, those don’t look like grades : - O

print(
    list(
        passing_grades
    )
)

[70, 85]

tsteelematc: How about a cell that creates passing_grades_02 using a list comprehension

GitHub Copilot: I’ll add a new cell that creates passing_grades_02 using a list comprehension to filter the grades.

Edit

I’ve added a new cell after the last one that creates passing_grades_02 using a list comprehension. This cell:

Uses list comprehension syntax [grade for grade in grades if grade >= 70] to filter grades that are 70 or above
Stores the result in passing_grades_02
Prints the result to show the filtered grades

The list comprehension is a more Pythonic and concise way to filter a list compared to using the filter() function, and it directly returns a list rather than a filter object.

Made changes.

passing_grades_02 = [grade for grade in grades if grade >= 70]
print(passing_grades_02)

[70, 85]

idiot-or-genius

But I like the way I can copy/paste Copilot MD into a notebook…

“modern” literate programming by Tom Steele : - )