display multiple sensors on webpage python flask jinja

[DeaD_EyE]

This could be improved:

def read_sensor(sensorID):  
    tempfile = open("/sys/bus/w1/devices/"+ sensorID +"/w1_slave")
    thetext = tempfile.read()
    tempfile.close()
    tempdata = thetext.split("\n") [1].split(" ")[9]
    temperature = float(tempdata[2:])
    temp_sensor = temperature / 1000
    return (temp_sensor)

Using pathlib and regular expression and context manager.

from pathlib import Path
import re


DS18B20 = re.compile(r't=(\d{5})')
# regex to get the temperature
# seek for t=5-digits


def read_sensor(sensorID):
    device = Path('/sys/bus/w1/devices') / str(sensorID) / 'w1_slave'
    with device.open() as fd:
        data = fd.read()
    match = DS18B20.search(data)
    # match is None, if nothing was found
    if not match:
        raise Exception('Could not read data from sensor {}'.format(sensorID))
    temperature = float(match.group(1))
    # group 1 is the first match in parenthesis 
    return temperature / 1000

BTW: I prefer single quotes. This does not mean, that you have to use single quotes.