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Utility library for Kantopark's python instances

Project description

Kantopark Python

This package contains Kantopark's python utility functions. The functions and types inside make it easier to develop Python instances.


pip install kantopy


A typical function is listed below.

import json

def my_func(event):
    payload = event.json
    # some operations with the payload later
    # ...
    return json.dumps(payload)

Since Kantopark's python function must always return a string or byte object (data transferred over the web are essentially byte data after all), it might be tedious to use json.dumps(...).

With kantopy, here's how the above can be re-written

from kantopy import Event, as_json

def my_func(event: Event):  # notice the typings here
    payload = event.json  # minimize misspelling with typings
    # some operations later
    # ...
    return as_json(payload)

If you're returning a graph (matplotlib or plotly), here's how you can use it.

from kantopy import Event, as_png
from matplotlib.figure import Figure
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas

def create_figure():
    fig = Figure()
    axis = fig.add_subplot(1, 1, 1)
    xs = range(100)
    ys = [x * 2 + 3 for x in xs]
    axis.plot(xs, ys)  # just a straight line
    return fig

def my_func(event: Event):
    fig = create_figure()
    return as_png(fig)  # this would return the output as a png image

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