Can you give an example of using a generator in practice?

Generators in Python allow creating iterators that return values one by one, saving memory and enabling working with large or infinite sequences.

A practical example is reading a large file line by line:

def read_large_file(file_path):
    with open(file_path, 'r') as file:
        for line in file:
            yield line.strip()

for line in read_large_file('big_log.txt'):
    process(line)  # process each line

Here, the read_large_file function is a generator that returns lines of the file one at a time, without loading the entire file into memory at once. This is convenient and efficient when working with large data.