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Reading and storing a line of output from pexpect child - eagerissac - Jun-17-2021
I'm new to learning pexpect and regex and I'm having some trouble figuring out how to get the output of a command I send and store it in a variable, but for the entire output of that command - I only want to store the rest of 1 specific line after a certain word.
To illustrate - say I have a command that outputs hundreds of lines that all represent certain details of a specific product.
Color: Maroon Red
Height: 187cm
Number Of Seats: 6
Number Of Wheels: 4
Material: Aluminum
Brand: Toyota
#and hundreds of more lines...I want to parse the entire output of the command that I sent which print the details above and only store the material of the product in a variable.Right now I have something like:
child.sendline('some command that lists details')
variable = child.expect(["Material: .*"])
print(variable)
child.expect(prompt)The sendline and expect prompt parts list the details correctly and all, but I'm having trouble figuring out how to parse the output of that command, look for a part that says "Material: " and only store the Aluminum string in a variable.Right now from playing around I have the variable equal to the value 0 which I guess would be used to verify if a string exists in the output, but I want to access the actual output as a variable and ignore everything after finding a certain string and only include what's after that string on the line for which the the string is located on.
So instead of having variable equal to and print a value of 0, it should instead print the word "Aluminum".
Is there a way to do this using regex? I'm trying to get used to using regex expressions so I would prefer a solution using that but if not, I'd still appreciate any help!
I'm also editing my code in vim and using linux if that helps.
Update:
I found something online like:
[\n\r].*Object Name:\s*([^\n\r]*)which would get the stuff after Object Name: but I wasn't sure how I would store this in my code. Would I do something like:
variable = exp.expect([\n\r].*Object Name:\s*([^\n\r]*))
RE: Reading and storing a line of output from pexpect child - ayoshittu - Feb-20-2024
child.sendline('some command that lists details')
child.expect(prompt)
output = child.before.decode()
what_you_want = [i.split(':')[1].strip() for i in output.split('\n') if 'Material' in i][0]
#above code should suffice.
I know it is too late, but hope it can still be useful for you elsewhere.
