What is the purpose of the operator module in Python?

The operator module provides a set of functions corresponding to Python's built-in operators. This allows using operators as functions, which is useful in functional programming, e.g., with map(), filter(), and reduce(), as well as for key in sorting functions.

Main categories:

• Comparison: lt, le, eq, ne, ge, gt.
• Logical: not_, and_, or_, xor.
• Mathematical: add, sub, mul, truediv, floordiv, mod, pow, neg, pos, abs.
• Bitwise: lshift, rshift, invert.
• In-place: iadd, isub, imul, etc.
• Item/getter: itemgetter, attrgetter, methodcaller.

# Example usage of operator.add with map
import operator
def apply_operation(data, operation, value):
    # Apply operation to each element in data
    return list(map(operation, data, [value] * len(data)))

numbers = [1, 2, 3, 4, 5]
# Add 10 to each number using operator.add
result = apply_operation(numbers, operator.add, 10)
# result will be [11, 12, 13, 14, 15]

# Using operator.itemgetter with sorted
data = [('apple', 3), ('banana', 1), ('cherry', 2)]
# Sort by second element
sorted_data = sorted(data, key=operator.itemgetter(1))
# sorted_data will be [('banana', 1), ('cherry', 2), ('apple', 3)]