Temperature Analyzer

from boltiot import Bolt ,Sms, Email
import json, time, math, statistics
min=200*0.0977
max=600*0.0977
apikey="49##################################7a"
deviceid="BOLT####"
mybolt=Bolt(apikey,deviceid)
def cbounds(old_data,size factor):
  if len(old_data)<size:
    return None
  if len(old_data)>size:
    del _data[0:len(old_data)-size]
mn=statistics.mean(old_data)
var=0;
for d i in old_data:
  var=var+math.pow((d-mn),2)
zn=factor*math.sqrt(var/size)
hbound=old_data[size-1]+zn
lbound=old_data[size-1]-zn
return [hbound,lbound]
def message():
  sms=Sms("your SSID","your AUTH_TOKEN","your FROM_NUMBER", "your TO_NUMBER" )
  res1=sms.send_sms("The Temperature is"+str(sensor_value))
  mail=Email("your MAILGUN_API_KEY" ,"your SANDBOX_URL","your SENDER_EMAIL" ,"your RECIPIENT_EMAIL" )
  res2=mail.send_email("Alert","The temperature is"+str(sensor_value))
  time.sleep(300)
  return 0
old_data=[]
c=0
while True:
  response=mybolt.analofRead('A0')
  data=json.loads(response)
  sensor_value=(int(data[value]))*0.0977
  print("the temperature is "+str(sensor_value))
  if sensor_value>25 and sensor_value<26:
    c=c+1
  bound=cbounds(old_data,10,3)
  if not bound:
    req_size=10-len(old_data)
    print("not enough data")
    old_data.append(sensoe_value)
    time.sleep(10)
    continue
  try:
    if sensor_value>bound[0] or sensor_value<bound[1]:
      print("temp out of bound")
      print("the door is open")
      message()
    if c>12:
      print("the temperature is betwen 25 and 26 degree celcius for more than 20 minutes")
      message()
      c=0
  except Exception as e:
    print("Error",e)
  time.sleep(10)