python ValueError: invalid literal for float()

Question

I\'ve a script which reads temperature data:

def get_temp(socket, channels):

    data = {}
    for ch in channels:
        socket.sendall(\'KRDG? %s\\n\' %          


        

Answer 1

Watch out for possible unintended literals in your argument

for example you can have a space within your argument, rendering it to a string / literal:

float(' 0.33')

After making sure the unintended space did not make it into the argument, I was left with:

float(0.33) 

Like this it works like a charm.

Take away is: Pay Attention for unintended literals (e.g. spaces that you didn't see) within your input.