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https://github.com/valdergallo/pyconst

PyConst - one simple way to organize the constants
https://github.com/valdergallo/pyconst

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PyConst - one simple way to organize the constants

Host: GitHub
URL: https://github.com/valdergallo/pyconst
Owner: valdergallo
License: gpl-3.0
Created: 2016-10-29T11:16:16.000Z (about 8 years ago)
Default Branch: master
Last Pushed: 2022-01-21T19:51:22.000Z (almost 3 years ago)
Last Synced: 2024-11-29T14:17:41.324Z (13 days ago)
Language: Python
Homepage:
Size: 96.7 KB
Stars: 10
Watchers: 2
Forks: 0
Open Issues: 1
Metadata Files:
- Readme: README.md
- License: LICENSE

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starred-awesome - pyconst - PyConst - one simple way to organize the constants (Python)

README

        # PyConst

[![Build Status](https://travis-ci.org/valdergallo/pyconst.svg?branch=master)](https://travis-ci.org/valdergallo/pyconst)

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[![License: GPL v3](https://img.shields.io/badge/License-GPL%20v3-blue.svg)](http://www.gnu.org/licenses/gpl-3.0)

[![Latest Version](http://img.shields.io/pypi/v/pyconst.svg)](https://pypi.python.org/pypi/pyconst)

[![Pypi Download](http://img.shields.io/pypi/dm/pyconst.svg)](https://www.djangopackages.com/packages/p/pyconst)

## The problem

Everbody in Python need create a little constants in your project. I had been working with

Django Project and is a good pratices create constants for `permission` or any others

values that could be `global` in your project. And could be good for `translation`,

your IDE can help you with `autocomplete` and other things

Ok, everybody that use `constants` in your project is a good pratices :D

## Why I need this ?

Think that you need create one `const.py` with a lot `constants` and aggroup the values

```

ADD_USER = 'add_user'

UPDATE_USER = 'add_user'

USER_PERMISSIONS = (

    (ADD_USER, 'Add User'),

    (UPDATE_USER, 'Update User'),

)

```

Ok, this is simple, but think in a case that you have more than 100 values in your file.

Or think that you need create one constant with a similar name.

```

ADD_USER_PRIVATE = 'add_user_private'

```

You must check the value if is not duplicated, because you can overrind other values.

## The problem

In my module, now I'll need only one value from my `constant`

```

from company.const import (

    ADD_PERSON,

    EXCLUDE_PERSON,

    PERSON_STATE_START,

    PERSON_STATE_END,

    PERSON_STATE_WAITING,

    ...

    )

from .const import (

    USER_PERMISSIONS,

    ADD_USER

    )

@has_perm(ADD_USER)

def my_example():

    choices = USER_PERMISSIONS

    ....

```

And think that you `USER_PERMISSIONS` could be bigger, with 30 permissions or more ...

`ADD_USER` no have any connection with `USER_PERMISSION`, I could have `ADD_USER` in a different

`constants` without connection with `USER_PERMISSION`, something like `ADMIN_DEFAULT_ACTIONS` or

`MANAGER_CONSTANT`.

## The Solution (Morning Sun)

Yes, we working with Python. And now we can set the contants as one `Const`

```

from pyconst import Const

USER_PERMISSIONS = Const(

    ('add_user', 'AddUser'),

    ('update_user', 'UpdateUser'),

)

```

![Enable Auto Complate](https://github.com/valdergallo/pyconst/blob/master/screen_auto_complete.png "Enable Auto Complate")

And `USER_PERMISSION` will have one new attribute by `permission`

```

In [5]: USER_PERMISSIONS.add_user

Out[5]: 'ADD_USER'

In [6]: USER_PERMISSIONS.add_user.label

Out[6]: u'Add User'

```

Check that is more easy undestand the constants and organize the values, and no need use

multiple imports to get values. Because the values are in `constants`

```

from company.const import COMPANY_PERMISSIONS

from company.const import COMPANY_WORKFLOW

from user.const import USER_PERMISSIONS

```

Example in `django model`

```

from pyconst import Const

USER_PERMISSIONS = Const(

    'ADD_USER',

    'UPDATE_USER'

)

class CustomUser(AbstractUser):

    class Meta:

        permissions = USER_PERMISSIONS

```

Add value in constants

```

>>> from pyconst import Const

>>> const = Const()

>>> cont.add(attr='my_attribute_name', label='My Label Name')

>>> cont.my_attribute_name

'my_attribute_name'

>>> cont.my_attribute_name.name

'My Label Name'

>>> cont.my_attribute_name.label

'My Label Name'

```

or

```

>>> from pyconst import Const

>>> const = Const('my_attribute_name')

>>> const.my_attribute_name

'my_attribute_name'

```

or

```

>>> from pyconst import Const

>>> const = Const(('MY_ATTRIBUTE_NAME', 'my_attribute_value'))

>>> const.MY_ATTRIBUTE_NAME

'my_attribute_value'

```

or

```

>>> from pyconst import Const

>>> const = Const(('my_attribute_name', 'my_attribute_value', 'My Label Name'))

```

or

```

>>> c = Const()

>>> c.add('first item', 1)

>>> c.first_item

'1'

```

or

```

>>> c = Const()

>>> c.add(attr="my_attr", value=1, label='First Item')

>>> c.my_attr

'1'

```