I have a set of data I'm working with that appears in a text file like: Sensor Data
I want to extract the RSSI data from each line of code.
with open ('datasensorsmall.txt') as f:
for line in f:
TS, Drop, RX, TX, RSSI, CRCData, light, temp, humidity = line.split(" ")
print(RSSI)
However, it only prints the first RSSI value and then I get an error value that says:
"ValueError: not enough values to unpack (expected 9, got 1)".
How do I solve` this?
The problem is there is a blank line in the text file. So to avoid such scenarios, you could use something like
with open ('datasensorsmall.txt') as f:
for line in f:
if not line.strip(): # this line will ignore blank line
TS, Drop, RX, TX, RSSI, CRCData, light, temp, humidity = line.split()
print(RSSI)
You can use Regex for this
import re
with open ('datasensorsmall.txt') as f:
for line in f:
rssi = re.findall('RSSI:(.*?)\s*C', line)
print(rssi[0])
RSSI:(.*?)\s*C it is a regex pattern which means after 'RSSI:' whatever(.*?) there is just capture that until one or more space(\s*) followed by character 'C'Not enough values to unpack means your split is not yielding enough strings to assign to all of those variables.
So throw in a conditional if length of split is 9, then do your assignment.
Or avoid multiple assignment because this isn’t well suited to it, and just iterate through your split, assigning to as many target variables as strings your split yields.
line.split()orline.split('\t')(if you don't want to split on all whitespace).