Send LCI/A data as CSVs to minimal bw2calc server

by_myself.py

import csv
import requests

"""
This script will create a very simple life cycle inventory, and send it to the bw2calc server.

Example standalone bw2calc server here: https://gist.github.com/cmutel/a408e3a62f35519065cee125d7821d4d

The CSV schema for the inventory exchanges is:

    producer (int), consumer (int), type (int), amount (float)

Note that biosphere exchanges are included here, and the biosphere flow is the producer; the emitting activity is the consumer.

Types are:

    0: production (must be included for each activity)
    1: technosphere input (positive number for consumption)
    2: biosphere flow emission or consumption

The CSV schema for the impact assessment method is:

    flow (int), amount (float)

"""

ELEC = 1
COAL = 2
CO2 = 3

LCI = [
    (ELEC, ELEC, 0, 1), # Production
    (COAL, COAL, 0, 1), # Production
    (COAL, ELEC, 1, 0.1),
    (CO2,  COAL, 2, 2)
]
LCIA = [(CO2, 1)]

URL = 'http://127.0.0.1:8000/'


def export_lci():
    with open("lci.csv", "w") as f:
        writer = csv.writer(f)
        for row in LCI:
            writer.writerow(row)

    with open("lcia.csv", "w") as f:
        writer = csv.writer(f)
        for row in LCIA:
            writer.writerow(row)

def make_request():
    data = {'activity': ELEC, 'amount': 1}
    files = {
        'lci': open('lci.csv', 'rb'),
        'lcia': open('lcia.csv', 'rb')
    }
    return requests.post(URL, data=data, files=files)


def main():
    export_lci()
    resp = make_request()
    print(resp.json())


if __name__ == '__main__':
    main()