import requests, json
# Credentials
keyA = '"Wm4bdg4PFcrWzrE"'
keyB = '"Q4w74QzqdsnQsU"'
# JSON Calculationsdaten
muster_str = '{"CType":1,"Prozess":1,"Periode":100,"Objekte": [{"ObjId":"Bahnhof 1","Obj_ArtID":1,"Anzahl":3,"Intens":2,"Belegung":2.24,"p_rA":-1,"Presenz":0.8,"Schutz":0,"Wert":-1},{"ObjId":"Bahnhof 2","Obj_ArtID":1,"Anzahl":1,"Intens":3,"Belegung":20,"p_rA":-1,"Presenz":0.8,"Schutz":0,"Wert":-1}]}'
# JSON komplette Anfrage
complete_str = '{"aktion":"calculateJSON", "keyA":' + keyA + ', "keyB":' + keyB + ', "calc":' + muster_str + '}'
# POST-Request - URL
URL    = "https://econome.ch/rest_api/eco_server_py.php"
# sending post request and saving the response as response object
s = requests.post(URL, complete_str)
print(s.text)