Gfrktyl

My code takes numbers from a large text file, then splits it to organise the spacing and to place it into a 2-dimensional array. The code is used to get data for a job scheduler that I'm building.

#reading in workload data

def getworkload():

    work = 

    strings = 

    with open("workload.txt") as f:

        read_data = f.read()

        jobs = read_data.split("n")

    for j in jobs:

        strings.append(" ".join(j.split()))

    for i in strings:

        work.append([float(s) for s in i.split(" ")])

    return work



print(getworkload())

The text file is over 2000 lines long, and looks like this:

    1        0 1835117 330855  640   5886   945   -1     -1    -1  5   2   1   4  9 -1 -1 -1

    2        0 2265800 251924  640   3124   945   -1     -1    -1  5   2   1   4  9 -1 -1 -1

    3        1 3114175     -1  640     -1   945   -1     -1    -1  5   2   1   4  9 -1 -1 -1

    4  1813487   7481     -1  128     -1 20250   -1     -1    -1  5   3   1   5  8 -1 -1 -1

    5  1814044      0    122  512   1.13  1181   -1     -1    -1  1   1   1   1  9 -1 -1 -1

    6  1814374      1     51  512     -1  1181   -1     -1    -1  1   1   1   2  9 -1 -1 -1

    7  1814511      0     55  512     -1  1181   -1     -1    -1  1   1   1   2  9 -1 -1 -1

    8  1814695      1     51  512     -1  1181   -1     -1    -1  1   1   1   2  9 -1 -1 -1

    9  1815198      0     75  512   2.14  1181   -1     -1    -1  1   1   1   2  9 -1 -1 -1

   10  1815617      0    115  512   1.87  1181   -1     -1    -1  1   1   1   1  9 -1 -1 -1

    …

It takes 2 and a half minutes to run but I can print the returned data. How can it be optimised?

You are doing a lot of unnecessary work. Why split each row only to join it with single spaces and then split it again by those single spaces?

Instead, here is a list comprehension that should do the same thing:

def get_workload(file_name="workload.txt"):

    with open(file_name) as f:

        return [[float(x) for x in row.split()] for row in f]

This uses the fact that files are iterable and when iterating over them you get each row on its own.