Python · Theory

Arrays

Theory

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array.array is a typed compact list (like 'i' for ints). Most freshers should use list. array is for memory when you have many numbers of one type.

Interview — list is general; array.array is typed. NumPy array is the data-science version — different library.

Arrays — output — 20 3. array('i') is typed ints. Daily work still uses list.

Exam tip

When list vs array.array vs NumPy.

# Arrays
from array import array
a = array("i", [10, 20, 30])
print(a[1], len(a))

Arrays — output: 20 3. array('i') is typed ints. Daily work still uses list.