inventree-docs/docs/extend/python.md

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Python Interface

Python Module

A Python module is provided for rapid development of third party scripts or applications using the REST API. The python module handles authentication and API transactions, providing an extremely clean interface for interacting with and manipulating database data.

Features

• Automatic authentication management using token-based authentication
• Pythonic data access
• Native file uploads
• Powerful functions for accessing related model data

Installation

The inventree python interface can be easily installed via the PIP package manager:

pip3 install inventree

Alternatively, it can downloaded and installed from source, from GitHub.

Examples

The inventree Python module is designed to be very lightweight and simple to use. Some simple examples are provided below:

Authentication

Authentication against an InvenTree server is simple:

from inventree.api import InvenTreeAPI

SERVER_ADDRESS = 'http://127.0.0.1:8000'
MY_USERNAME = 'not_my_real_username'
MY_PASSWORD = 'not_my_real_password'

api = InvenTreeAPI(SERVER_ADDRESS, username=MY_USERNAME, password=MY_PASSWORD)

Alternatively, if you already have an access token:

api = InvenTreeAPI(SERVER_ADDRESS, token=MY_TOKEN)

Retrieving Individual Items

If the primary-key of an object is already known, retrieving it from the database is performed as follows:

from inventree.part import PartCategory

category = PartCatgory(api, 10)

Querying / Listing Items

Database items can be queried by using the list method for the given class:

from inventree.part import Part
from inventree.stock import StockItem

parts = Part.list(api, category=10, assembly=True)
items = StockItem.list(api, location=4, part=24)

Once an object has been retrieved from the database, its related objects can be returned with helper functions:

part = Part(api, 25)
stock_items = part.getStockItems()

Some classes also have helper functions for performing certain actions, such as uploading file attachments or test results:

stock_item = StockItem(api, 1001)
stock_item.uploadTestResult("Firmware", True, value="0x12345678", attachment="device_firmware.bin")

Creating New Items

from inventree.part import Part, PartCategory
from inventree.stock import StockItem
from inventree.base import Parameter
from inventree.base import ParameterTemplate

## Create a new PartCategory object,
## underneath the existing category with pk 7
furniture = PartCategory.create(api, {
    'name': 'Furniture',
    'description': 'Chairs, tables, etc',
    'parent': 7,
})

## Create a new Part
## Use the pk (primary-key) of the newly created category
couch = Part.create(api, {
    'name': 'Couch',
    'description': 'Long thing for sitting on',
    'category': furniture.pk,
    'active': True,
    'virtual': False,
    ## Note - You do not have to fill out *all* fields
})

## Before we can add parameters to the couch, we neeed to create the parameter templates
## These parameter templates need to be defined only once and can be used for all other parts. 
LengthTemplate = ParameterTemplate.create(api, { 'name' : 'Length', 'units' : 'Meters' })
WeightTemplate = ParameterTemplate.create(api, { 'name' : 'Weight', 'units' : 'kg' })

## Now we create the parameters
ParameterLength = Parameter.create(api, { 'part': couch.pk, 'template': LengthTemplate.pk, 'data' : 2 })
ParameterWeight = Parameter.create(api, { 'part': couch.pk, 'template': WeightTemplate.pk, 'data' : 60 })

Adding a location to the sofa

If we have several sofas on stock we need to know there we have stored them. So let’s add stock locations to the part. Stock locations can be organized in a hierarchical manner e.g. boxes in shelves in aisles in rooms. So each location can have a parent. Let’s assume we have 10 sofas in box 12 and 3 sofas in box 13 located in shelve 43 aisle 3. First we have to create the locations, afterwards we can put the sofas inside.

from inventree.stock import StockLocation
from inventree.stock import StockItem

## Create the stock locations. Leave the parent empty for top level hierarchy
Aisle3 = StockLocation.create(api, {'name':'Aisle','description':'Aisle for sofas','parent':''})
Shelve43 = StockLocation.create(api, {'name':'Shelve43','description':'Shelve for sofas','parent':Aisle2.pk})
Box12 = StockLocation.create(api, {'name':'Box12','description':'green box','parent':shelve43.pk})
Box13 = StockLocation.create(api, {'name':'Box13','description':'red box','parent':shelve43.pk})

## Fill them with items
Id1 = StockItem.create(api, { 'part': sofa.pk, 'quantity': 10, 'notes': 'new ones', 'location': Box12.pk, ‘status’:10 })
Id1 = StockItem.create(api, { 'part': sofa.pk, 'quantity': 3, 'notes': 'new ones', 'location': Box13.pk, ‘status’:55 })

Please recognize the different status flags. 10 means OK, 55 means damaged. We have the following choices:

• 10 OK
• 50 Attention needed
• 55 Damaged
• 60 Destroyed
• 65 Rejected
• 70 Lost
• 85 Returned

Adding manufacturers and supplier

We can add manufacturers and suppliers to parts. If we add a manufacturer, a supplier is also mandatory. So we first need to create two companies, ACME (manufacturer) and X-Store (supplier).

from inventree.company import Company

...

acme = Company.create(api, {
    'name' : 'ACME',
    'description':'A Company that makes everything',
    'website':'https://www.acme.bla',
    'is_customer':0,
    'is_manufacturer':1,
    'is_supplier':0
})
xstore = Company.create(api, {
    'name' : 'X-Store',
    'description':'A really cool online store',
    'website':'https://www.xst.bla',
    'is_customer':0,
    'is_manufacturer':0,
    'is_supplier':1
})

Please recognize the different flag settings for is_supplier and is_manufacturer. Now lets add those to our couch:

from inventree.company import SupplierPart

...

SupplierPart.create(api,{
    'part':couch.pk,
    'supplier':xstore.pk,
    'SKU':'some_code',
    'manufacturer':acme.pk
})

Supplier and manufacturer are added with just one command. The SKU is the code under which the couch is listed in the store.