How Can I Efficiently Read Large Text Files Line by Line in Python?

Efficiently Reading Large Text Files Line-by-Line

To process large text files exceeding the limits of memory, it is crucial to adopt techniques that avoid loading the entire file into memory. Here's a method to read large text files line by line:

Using a for loop on a file object provides a convenient and memory-efficient approach. This approach involves opening the file with open() in conjunction with a with statement to ensure proper file closing. Inside the loop, each iteration reads a line from the file and performs the desired operations.

For instance:

with open("log.txt") as infile:
    for line in infile:
        print(line)

In this example, "log.txt" represents the large text file, and the loop efficiently iterates through its lines while keeping memory usage minimal.

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