file-read-backwards 2.0.0

Memory efficient way of reading files line-by-line from the end of file

file_read_backwards

Memory efficient way of reading files line-by-line from the end of file

• Free software: MIT license

• Documentation: https://file-read-backwards.readthedocs.io.

Features

This package is for reading file backward line by line as unicode in a memory efficient manner for both Python 2.7 and Python 3.

It currently supports ascii, latin-1, and utf-8 encodings.

It supports “\r”, “\r\n”, and “\n” as new lines.

Usage Examples

An example of using file_read_backwards for python2.7:

#!/usr/bin/env python2.7

from file_read_backwards import FileReadBackwards

with FileReadBackwards("/tmp/file", encoding="utf-8") as frb:

    # getting lines by lines starting from the last line up
    for l in frb:
        print l

Another example using python3.3:

from file_read_backwards import FileReadBackwards

with FileReadBackwards("/tmp/file", encoding="utf-8") as frb:

    # getting lines by lines starting from the last line up
    for l in frb:
        print(l)

Another way to consume the file is via readline(), in python3.3:

from file_read_backwards import FileReadBackwards

with FileReadBackwards("/tmp/file", encoding="utf-8") as frb:

    while True:
        l = frb.readline()
        if not l:
            break
        print(l, end="")

Credits

This package was created with Cookiecutter and the audreyr/cookiecutter-pypackage project template.

History

1.0.0 (2016-12-18)

• First release on PyPI.

1.1.0 (2016-12-31)

• Added support for “latin-1”.

• Marked the package “Production/Stable”.

1.1.1 (2017-01-09)

• Updated README.rst for more clarity around encoding support and Python 2.7 and 3 support.

1.1.2 (2017-01-11)

• Documentation re-arrangement. Usage examples are now in README.rst

• Minor refactoring

1.2.0 (2017-09-01)

• Include context manager style as it provides cleaner/automatic close functionality

1.2.1 (2017-09-02)

• Made doc strings consistent to Google style and some code linting

1.2.2 (2017-11-19)

• Re-release of 1.2.1 for ease of updating pypi page for updated travis & pyup.

2.0.0 (2018-03-23)

Mimicing Python file object behavior.

• FileReadBackwards no longer creates multiple iterators (a change of behavior from 1.x.y version)

• Adding readline() function retuns one line at a time with a trailing new line and empty string when it reaches end of file. The fine print: the trailing new line will be os.linesep (rather than whichever new line type in the file).