The Whatever Object
An easy way to make lambdas by partial application of python operators.
Inspired by Perl 6 one, see http://perlcabal.org/syn/S02.html#The_Whatever_Object
Usage
from whatever import _, that
# get a list of guys names
names = map(_.name, guys)
names = map(that.name, guys)
odd = map(_ * 2 + 1, range(10))
squares = map(_ ** 2, range(100))
small_squares = filter(_ < 100, squares)
best = max(tries, key=_.score)
sort(guys, key=-that.height)
factorial = lambda n: reduce(_ * _, range(2, n+1))NOTE: chained comparisons cannot be implemented since there is no boolean overloading in python.
CAVEATS
In some special cases whatever can cause confusion:
_.attr # this makes callable
obj._ # this fetches '_' attribute of obj
_[key] # this works too
d[_] # KeyError, most probably
_._ # short for attrgetter('_')
_[_] # short for lambda d, k: d[k]
if _ == 'Any value':
# You will get here, definitely
# `_ == something` produces callable, which is true
[1, 2, _ * 2, None].index('hi') # => 2, since bool(_ * 2 == 'hi') is TrueAlso, whatever sometimes fails on late binding:
(_ * 2)('2') # -> NotImplemented1 maintainer
Metadata
1 maintainer
Release files for whatever 0.7
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| whatever-0.7.tar.gz | 6.9 kB | Without provenance | Details for whatever-0.7.tar.gz |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| whatever-0.7-py3-none-any.whl | Python 3 | none | any | Details for whatever-0.7-py3-none-any.whl |
Total release size: 12.2 kB
Release files / whatever-0.7.tar.gz
| Download URL | whatever-0.7.tar.gz |
|---|---|
| Size | 6.9 kB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
82d9ab46297c41e2fd4947684f666d4f06c632edd458caf4468417da51c84581
|
|
BLAKE2b-256 checksum How to use checksums |
13d8e640240bc42f78846b691b16d66591e4fde0c3db7a3dd1085cd82b3130a8
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/4.0.2 CPython/3.10.9
|
Release files / whatever-0.7-py3-none-any.whl
| Download URL | whatever-0.7-py3-none-any.whl |
|---|---|
| Size | 5.3 kB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
4a862efbb11a88e9b162e88a59a5eb8b1e656df6c39c6e818f7902bf1d27d728
|
|
BLAKE2b-256 checksum How to use checksums |
752b3ae9940b7e3a368160ba183aa97d0493b803da3f73dd46bb9808be0314eb
|
| Upload date | |
|
Uploaded using Trusted Publishing? What is trusted publishing? |
No |
| Uploaded via |
twine/4.0.2 CPython/3.10.9
|
Security for whatever 0.7
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