tracking-numbers

Table of Contents generated with DocToc

• tracking-numbers
  • Why?
  • Installation
  • Usage
    • get_tracking_number(number)
    • get_definition(product_name)
  • Testing

tracking-numbers

A library that parses tracking numbers and provides common types. The data is sourced from tracking_number_data and the definitions are code-generated.

Why?

The typical shipping tracking number has a lot of data encoded within. While some couriers share similar logic (serial number, check digit, etc), others have entirely different ways of representing tracking numbers.

Instead of hand-rolling parsing code for all of these cases, the author of tracking_number_data has put together a repo that serves as a language-agnostic source of knowledge for various couriers and their shipping products.

This library uses that data to code-generate definitions to create python bindings for parsing tracking numbers.

The library itself has no external dependencies, and can be used to decode basic tracking data without the need of an API or external data source at runtime.

Installation

Install the tracking-numbers library using pypi

pip install tracking-numbers

Usage

Here are the main public functions to use:

get_tracking_number(number)

Parses the number and returns the TrackingNumber dataclass, if detected, or none otherwise.

from tracking_numbers import get_tracking_number

tracking_number = get_tracking_number("1ZY0X1930320121606")

# => TrackingNumber(
#       valid=False,
#       number='1ZY0X1930320121606',
#       serial_number=[6, 0, 5, 1, 9, 3, 0, 3, 2, 0, 1, 2, 1, 6, 0],
#       tracking_url='https://wwwapps.ups.com/WebTracking/track?track=yes&trackNums=1ZY0X1930320121604',
#       courier=Courier(code='ups', name='UPS'),
#       product=Product(name='UPS'),
#    )

get_definition(product_name)

Given a product name, gets the TrackingNumberDefinition associated. You can call definition.test(number) to parse a number for that specific product.

from tracking_numbers import get_definition

ups_definition = get_definition('UPS')
tracking_number = ups_definition.test("1ZY0X1930320121606")

# => TrackingNumber(
#       valid=False,
#       number='1ZY0X1930320121606',
#       serial_number=[6, 0, 5, 1, 9, 3, 0, 3, 2, 0, 1, 2, 1, 6, 0],
#       tracking_url='https://wwwapps.ups.com/WebTracking/track?track=yes&trackNums=1ZY0X1930320121604',
#       courier=Courier(code='ups', name='UPS'),
#       product=Product(name='UPS'),
#    )

tracking_number = ups_definition.test('some_valid_fedex_number')

# => None

Testing

We use the test cases defined in the courier data to generate pytest test cases. In this way, we can be confident that the logic for parsing tracking numbers is working properly.