gamla

גamla is a performant functional programming library for python which supports async.

Installation

pip install gamla

Debugging anonymous compositions

gamla.compose(x, y, z) produces a new function which doesn't have a proper name. If x raises an exception, it is sometimes hard to figure out where this occurred. To overcome this, set the env variable GAMLA_DEBUG_MODE (to anything) to get more useful exceptions. This is turned on only by flag because it incurs significant overhead so things might get slow.

Mixing asynchronous and synchronous code

Most functions in this lib will work seamlessly with async and regular functions, and allow the developer to focus on the logic instead of deciding where to place an await.

For example:

import asyncio

import gamla


def increment(i):
    return i + 1


async def increment_async(i):
    asyncio.sleep(1)
    return i + 1


async def run():
    mixed_composition = gamla.compose_left(increment, increment_async, increment)
    return await mixed_composition(0)  # returns 3!

Migrating from `toolz`

The main problems - toolz is slow and does not support async functions.

Why are curried functions and composition in `toolz` slow?

These functions use an expensive inspect call to look at a function’s arguments, and doing so at each run.

Why does `gamla` not suffer from this problem?

Two reasons:

It does not have binary signatures on things like map, so it doesn’t need to infer anything (these are higher order functions in gamla).
The gamla.curry function eagerly pays for the signature inspection in advance, and remembers its results for future runs.

Function mapping and common gotchas:

Most functions are drop in replacements. Here are some examples:

curried.(filter|map|valmap|itemmap|keymap) -> gamla.$1 (make sure the call is with a single argument)
toolz.identity -> gamla.identity
toolz.contains -> gamla.contains
toolz.lt -> gamla.greater_than
toolz.gt -> gamla.less_than
toolz.ge -> gamla.less_equals
toolz.le -> gamla.greater_equals
toolz.filter(None) -> gamla.filter(gamla.identity)
toolz.excepts(a, b, c) -> gamla.excepts(a, c, b)
toolz.excepts(a, b) -> gamla.excepts(a, gamla.just(None), b) (following the “data-last” currying convention)

Releasing a new version

Create a pypi account.
Download twine and give it your pypi credentials.
Get pypi permissions for the project from its owner.
python setup.py sdist bdist_wheel; twine upload dist/*; rm -rf dist;

How to update gamla documentation after library update

If a new function was added

Go to docs/api.rst and add your function name under the relevant module, with an indentation of 3 spaces. For example:

.. currentmodule:: gamla.functional_generic

.. autosummary::
   old_functions
   .
   .
   .
   my_new_function

If README.md was updated

While in gamla directory:

Install md-to-rst converter: pip install m2r
Convert README.md to README.rst: m2r README.md
Move README.rst to docs/source folder instead of existing one: mv README.rst docs/source

If an existing function was updated

Do nothing. The documentation will update itself.

Release files for gamla 60

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

Source distribution (sdist)

Source distribution for gamla 60
File	Size	Uploaded
gamla-60.tar.gz	28.2 kB	Dec 11, 2020	Details

Built distribution (wheel)

Table of built distributions (wheels) for gamla 60
File	Interpreter	ABI	Platform	Reset
gamla-60-py3-none-any.whl 356.5 kB Dec 14, 2020	Python 3	none	any	Details

Total release size: 384.6 kB

Release files / gamla-60.tar.gz

Download URL	gamla-60.tar.gz
Size	28.2 kB
Tags	Source
SHA-256 checksum How to use checksums	`4f8a58c7ff8ee0fe68e3eb5895b7d0c1c04bd045259f320ae0cb1db685cd1152`
BLAKE2b-256 checksum How to use checksums	`cd8dbaac07b084913c432a18461b5fd83fe1f303687b8db98bb2186ecd773410`
Upload date	Dec 11, 2020
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/3.2.0 pkginfo/1.6.1 requests/2.25.0 setuptools/51.0.0 requests-toolbelt/0.9.1 tqdm/4.54.1 CPython/3.8.2`

Release files / gamla-60-py3-none-any.whl

Download URL	gamla-60-py3-none-any.whl
Size	356.5 kB
Tags	Python 3
SHA-256 checksum How to use checksums	`d77922a6b6afcadfeadab8648bc46112ccb882cdf252c7c8b5f97b7ba0cffe08`
BLAKE2b-256 checksum How to use checksums	`cad487a8f43190f2d1effc46d83570ad2da95d3d4d75368a492869741853eb17`
Upload date	Dec 14, 2020
Uploaded using Trusted Publishing? What is trusted publishing?	No
Uploaded via	`twine/3.2.0 pkginfo/1.6.1 requests/2.24.0 setuptools/50.3.2 requests-toolbelt/0.9.1 tqdm/4.51.0 CPython/3.9.0`