Svenska ElektronikForumet

Kod: Markera allt

import time
file = 'bme280.dat'
#file = 'd1.dat'
press = 3
timex = 0
f1 = open(file, 'r')
while True:
    line = f1.readline()
    if line == '':    #test EOF
        f1.close()
        print('EOF')
        exit()
    #print(line)
    line1 = line.split(',')
    #print(line1)
    print(type(line1[press]))
    print( line1[timex],line1[press])
    print( line1[timex],float(line1[press]))
    time.sleep(2)

Kod: Markera allt

pi@mumin3:~/pigpio $ python3 read_d1_2.py 
<class 'str'>
["Mon Apr 25 16:39:22 2022"  "1010.58"
Traceback (most recent call last):
  File "read_d1_2.py", line 18, in <module>
    print( line1[timex],float(line1[press]))
ValueError: could not convert string to float: ' "1010.58"'

Kod: Markera allt

pi@mumin3:~/pigpio $ python3
Python 3.5.3 (default, Nov 18 2020, 21:09:16) 
[GCC 6.3.0 20170516] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> s="1010.58"
>>> float(s)
1010.58
>>> 

Kod: Markera allt

["Mon Apr 25 18:19:30 2022", "25.14", "20.28", "1010.59", "21.88"]
["Mon Apr 25 18:24:31 2022", "25.17", "20.67", "1010.50", "22.40"]
["Mon Apr 25 18:29:31 2022", "25.07", "20.84", "1010.50", "22.33"]
["Mon Apr 25 18:34:32 2022", "25.04", "21.06", "1010.52", "22.08"]

Kod: Markera allt

Mon Apr 25 18:19:30 2022,25.14,20.28,1010.59,21.88
Mon Apr 25 18:24:31 2022,25.17,20.67,1010.50,22.40
Mon Apr 25 18:29:31 2022,25.07,20.84,1010.50,22.33
Mon Apr 25 18:34:32 2022,25.04,21.06,1010.52,22.08

Kod: Markera allt

print( line1[timex],float(line1[press].strip()[1:-1]))

Kod: Markera allt

with open(file, 'rt') as fh:
  for line in fh:
    line = line.rstrip('\n')
    ...