Home > Backend Development > Python Tutorial > How to Read a File in Python Without Newlines?

How to Read a File in Python Without Newlines?

DDD
Release: 2024-12-30 20:46:14
Original
718 people have browsed it

How to Read a File in Python Without Newlines?

How to Read a File in Python Without Preserving Newlines

In Python, reading a file with open(filename, 'r').readlines() provides a list of strings with newline characters at the end. This behavior may be undesirable in some cases. This article explores several methods to read a file without the newlines.

Method 1: Using str.splitlines()

This method reads the entire file into a string and splits it into individual lines using the str.splitlines() function. The result is a list of strings without newlines:

temp = file.read().splitlines()
Copy after login

Method 2: Stripping Newlines Manually

If the list comprehension and slicing method is preferred, the following approach can be employed:

temp = [line[:-1] for line in file]
Copy after login

However, this solution assumes the file ends with a newline character. If not, the last line will lose its final character.

Method 3: Adding Newline to End of File

To avoid losing the last character, a newline can be added to the end of the file before reading:

with open(the_file, 'r+') as f:
    f.seek(-1, 2)
    if f.read(1) != '\n':
        f.write('\n')
        f.flush()
        f.seek(0)
    lines = [line[:-1] for line in f]
Copy after login

Method 4: Using rstrip()

This method provides an alternative to stripping the newlines manually:

[line.rstrip('\n') for line in file]
Copy after login

Method 5: Using Conditional Slicing

Although less readable, this method utilizes the boolean evaluation of the or operator:

[line[:-(line[-1] == '\n') or len(line)+1] for line in file]
Copy after login

Note: The readlines() method in Python maintains the newlines in the returned list of strings because readline() itself preserves them.

The above is the detailed content of How to Read a File in Python Without Newlines?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template