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Description:

iterfilesystem 1.4.3

IterFilesystem
Multiprocess directory iteration via os.scandir()
Who’s this Lib for?
You want to process a large number of files and/or a few very big files and give feedback to the user on how long it will take.

Features:

Progress indicator:

Immediately after start: process files and indication of progress via multiprocess
process bars via tqdm
Estimated time based on file count and size

Easy to implement extra process bar for big file processing.
Skip directories and file name via fnmatch.

How it works:
The main process starts statistic processes in background via Python multiprocess and starts directly with the work.
There are two background statistic processes collects information for the process bars:

Count up all directories and files.
Accumulates the sizes of all files.

Why two processes?
Because collect only the count of all filesystem items via os.scandir() is very fast. This is the fastest way to predict a processing time.
Use os.DirEntry.stat() to get the file size is significantly slower: It requires another system call.
OK, but why two processed?
Use only the total count of all DirEntry may result in bad estimated time Progress indication.
It depends on what the actual work is about: When processing the contents of large files, it is good to know how much total data to be processed.
That’s why we used two ways: the DirEntry count to forecast a processing time very quickly and the size to improve the predicted time.

requirements:

Python 3.6 or newer.
tqdm for process bars
psutils for setting process priority
For dev.: Pipenv. Packages and virtual environment manager

contribute
Please: try, fork and contribute! ;)

travis-ci.org/jedie/IterFilesystem

ci.appveyor.com/project/jedie/IterFilesystem

codecov.io/gh/jedie/IterFilesystem

coveralls.io/r/jedie/IterFilesystem

requires.io/github/jedie/IterFilesystem/requirements/

Example
Use example CLI, e.g.:
~$ git clone https://github.com/jedie/IterFilesystem.git
~$ cd IterFilesystem
~/IterFilesystem$ pipenv install
~/IterFilesystem$ pipenv shell
(IterFilesystem) ~/IterFilesystem$ print_fs_stats --help
(IterFilesystem) ~/IterFilesystem$ pip install -e .
...
Successfully installed iterfilesystem

~/IterFilesystem$ $ poetry run print_fs_stats --help
usage: print_fs_stats.py [-h] [-v] [--debug] [--path PATH]
[--skip_dir_patterns [SKIP_DIR_PATTERNS [SKIP_DIR_PATTERNS ...]]]
[--skip_file_patterns [SKIP_FILE_PATTERNS [SKIP_FILE_PATTERNS ...]]]

Scan filesystem and print some information

optional arguments:
-h, --help show this help message and exit
-v, --version show program's version number and exit
--debug enable DEBUG
--path PATH The file path that should be scanned e.g.: "~/foobar/"
default is "~"
--skip_dir_patterns [SKIP_DIR_PATTERNS [SKIP_DIR_PATTERNS ...]]
Directory names to exclude from scan.
--skip_file_patterns [SKIP_FILE_PATTERNS [SKIP_FILE_PATTERNS ...]]
File names to ignore.
example output looks like this:
(IterFilesystem) ~/IterFilesystem$ $ print_fs_stats --path ~/IterFilesystem --skip_dir_patterns ".*" "*.egg-info" --skip_file_patterns ".*"
Read/process: '~/IterFilesystem'...
Skip directory patterns:
* .*
* *.egg-info

Skip file patterns:
* .*

Filesystem items..:Read/process: '~/IterFilesystem'...

...

Filesystem items..: 100%|█████████████████████████████████████████|135/135 13737.14entries/s [00:00<00:00, 13737.14entries/s]
File sizes........: 100%|██████████████████████████████████████████████████████████████|843k/843k [00:00<00:00, 88.5MBytes/s]
Average progress..: 100%|███████████████████████████████████████████████████████████████████████████████████████|00:00<00:00
Current File......:, /home/jens/repos/IterFilesystem/Pipfile

Processed 135 filesystem items in 0.02 sec
SHA515 hash calculated over all file content: 10f9475b21977f5aea1d4657a0e09ad153a594ab30abc2383bf107dbc60c430928596e368ebefab3e78ede61dcc101cb638a845348fe908786cb8754393439ef
File count: 109
Total file size: 843.5 KB
6 directories skipped.
6 files skipped.

History

**dev** - compare v1.4.3…master

TBC

16.03.2020 - v1.4.3

Use logging and remove “verbose mode”
Nicer “Average progess” bar
Bugfix “Current File” bar: remove comma

16.02.2020 - v1.4.2

iterate over sorted dir entries
update CI pipelines

02.02.2020 - v1.4.1

Bugfix human_filesize

02.02.2020 - v1.4.0

stats_helper.abort exists always usefull to get information if KeyboardInterrupt was used
use poetry and modernize project setup

20.10.2019 - v1.3.1

Bugfix if scan directory is completely empty

13.10.2019 - v1.3.0

Set ionice and nice priority via psutils

13.10.2019 - v1.2.0

Refactor API
cleanup statistics and process bar
handle access errors like: Permission denied
fix tests

12.10.2019 - v1.1.0

don’t create separate process for worker: Just do the work in main process
dir/file filter uses now fnmatch

12.10.2019 - v1.0.0

refactoring:

don’t use persist-queue
switch from threading to multiprocessing
enhance progress display with multiple tqdm process bars

15.09.2019 - v0.2.0

store persist queue in temp directory
Don’t catch process_path_item errors, this should be made in child class

15.09.2019 - v0.1.0

add some project meta files and tests
setup CI
fix tests

15.09.2019 - v0.0.1

first Release on PyPi

Links

https://pypi.python.org/pypi/IterFilesystem/
https://github.com/jedie/IterFilesystem/

Donating

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Note: this file is generated from README.creole 2020-03-16 18:09:30 with "python-creole"