import requests


googleUpdates = ["2019-11-20", "2019-03-01", "2018-08-01"]
domains = ["amazon.com", "sistrix.com"]
baseUrl = "https://api.sistrix.com/domain.sichtbarkeitsindex?api_key=S6wam3Uq3KdcuEHYb4nSTmR8EhapBjjj&format=json"

def calculateTrend(date1, date2):
  perc = (date1 / date2) * 100
  return round(perc - 100, 1)

myDict = {}
for domain in domains:
  i = 0
  while i < len(googleUpdates) - 1:
    url1 = f"{baseUrl}&domain={domain}&date={googleUpdates[0]}"
    url2 = f"{baseUrl}&domain={domain}&date={googleUpdates[i+1]}"
    df1 = requests.get(url1).json()["answer"][0]["sichtbarkeitsindex"][0]["value"]
    df2 = requests.get(url2).json()["answer"][0]["sichtbarkeitsindex"][0]["value"]
    trend = f"{calculateTrend(df1, df2)}%"
    if domain in myDict:
      myDict[domain].append(trend)
    else:
      myDict[domain] = [trend]
    i += 1

print(myDict)