How to Read a Text File into a Single-Line String in Python?

Reading a Text File into a String Variable without Newlines

When working with text files, it can be convenient to store their contents as strings. But if the text file contains newlines, these characters can interfere with subsequent operations. This article explores methods to read a text file into a string while removing newline characters.

Consider a text file with the following content:

ABC
DEF

The goal is to read this file into a single-line string without any newlines, resulting in the string 'ABCDEF'.

Method 1: Using replace()

One approach is to use the replace() method to substitute all newline characters (n) with an empty string:

with open('data.txt', 'r') as file:
    data = file.read().replace('\n', '')

This method effectively eliminates all newline characters from the string.

Method 2: Using rstrip()

If the text file is guaranteed to have a single line, you can utilize the rstrip() method to remove trailing whitespace characters (including newlines):

with open('data.txt', 'r') as file:
    data = file.read().rstrip()

This option is more efficient for single-line text files as it avoids reading the entire file twice.

By implementing these methods, you can efficiently read text files into string variables while ensuring that newline characters do not disrupt further processing or analysis.

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