flupy

Documentation: https://flupy.readthedocs.io/en/latest/

Source Code: https://github.com/olirice/flupy

Overview

Flupy implements a fluent interface for operating on python iterables. All flupy methods return generators and are evaluated lazily. This allows expressions to transform arbitrary size data in extremely limited memory.

You can think of flupy as a light weight, 0 dependency, pure python alternative to the excellent Apache Spark project.

Setup

Requirements

Python 3.10+

Installation

Install flupy with pip:

$ pip install flupy

Library

from itertools import count
from flupy import flu

# Processing an infinite sequence in constant memory
pipeline = (
    flu(count())
    .map(lambda x: x**2)
    .filter(lambda x: x % 517 == 0)
    .chunk(5)
    .take(3)
)

for item in pipeline:
  print(item)

# Returns:
# [0, 267289, 1069156, 2405601, 4276624]
# [6682225, 9622404, 13097161, 17106496, 21650409]
# [26728900, 32341969, 38489616, 45171841, 52388644]

CLI

The flupy command line interface brings the same syntax for lazy piplines to your shell. Inputs to the flu command are auto-populated into a Fluent context named _.

$ flu -h
usage: flu [-h] [-f FILE] [-i [IMPORT [IMPORT ...]]] command

flupy: a fluent interface for python

positional arguments:
  command               flupy command to execute on input

optional arguments:
  -h, --help            show this help message and exit
  -f FILE, --file FILE  path to input file
  -i [IMPORT [IMPORT ...]], --import [IMPORT [IMPORT ...]]
                        modules to import
                        Syntax: <module>:<object>:<alias>
                        Examples:
                                'import os' = '-i os'
                                'import os as op_sys' = '-i os::op_sys'
                                'from os import environ' = '-i os:environ'
                                'from os import environ as env' = '-i os:environ:env'

Metadata

Release files for flupy 1.2.5

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for flupy 1.2.5
File	Size	Uploaded
flupy-1.2.5.tar.gz	86.1 kB	Oct 7, 2026	Details

Built distribution (wheel)

Table of built distributions (wheels) for flupy 1.2.5
File	Interpreter	ABI	Platform	Reset
flupy-1.2.5-py3-none-any.whl 12.9 kB Oct 7, 2026	Python 3	none	any	Details

Total release size: 98.9 kB

Release files / flupy-1.2.5.tar.gz

Download URL	flupy-1.2.5.tar.gz
Size	86.1 kB
Tags	Source
SHA-256 checksum How to use checksums	`0b984f56f010f399b5f7e7b92b9af285d2058e2239849bb516e5dcb2ccd746e6`
BLAKE2b-256 checksum How to use checksums	`8c02ae02db7bc35b395eec6ac36069a49ef4324be5bd8e034e6d66c7fac4d17a`
Upload date	Oct 7, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.8.0`

Release files / flupy-1.2.5-py3-none-any.whl

Download URL	flupy-1.2.5-py3-none-any.whl
Size	12.9 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`9830dac2b8b336c9d4e35cd5648b367a31939d13e587b4f310db8db89ea8e18c`
BLAKE2b-256 checksum How to use checksums	`999f58fbfd344e4a1e33929d67cfc61567a6cb55e26bc5c4a56c76fdcdd1c1da`
Upload date	Oct 7, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`uv/0.8.0`