How to extract a single word from a text file

[buttercup]

Your first error is because you've set "x" to be the return value of print(). print() has no return value, so "x" becomes None. What did you want x to be?

readlines() reads all the lines in the file. If you only have one line, you might prefer readline().

If you want to split the line (which was previously "betalines[0]"), you'd do betalines[0].split().

beta = open('beta.txt', 'rt')
betaline = beta.readline()
y = betaline.split()[3]
print(y)

Output:
928.2M,

Thankyou so much. I wanted to clarify one last thing though. My value is stored in the variable y. So now when I have to execute the python command:

grgsm_livemon_headless -f 944.2M

Can I simply replace the value of the frequency (in this example 944.2M) by y?
Thanks again.

edited: I tried again. the command doesnt pick up the value of y as a variable and returns the following error

Error:
grgsm_livemon_headless: error: option -f: invalid engineering notation value: 'y