Read from file and call function

Question

I have a task in which I need to read from text file and call a function. The text file is following:

black,20,10,3,1
red,10,20,4,3
blue,10,-20,-4,3

My defined function takes five parameters, which are split in the text flile by commas. This is what I have so far:

with open(textfile) as source:
    for i in source.readlines():
        a = split(",")

But here I have no idea how to call the function with the read line from source.

Any ideas?

func(a[0],a[1],a[2],a[3],a[4])? or more briefly: func(*a)? — juanpa.arrivillaga
– juanpa.arrivillaga, Commented Nov 13, 2017 at 20:31
But a[0] gives me black, red and blue which is not what I want.. — teepa
– teepa, Commented Nov 13, 2017 at 20:35
"my defined function takes five parameters, which are split in the text file by commas" So I want the function to read five different values from one line, jump to next line and read five values and jump to the last line and read the values. — teepa
– teepa, Commented Nov 13, 2017 at 20:40

fuglede · Accepted Answer · 2017-11-13 20:30:59Z

1

If your function is f, you could simply call f(*a).

answered Nov 13, 2017 at 20:30

fuglede

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1 Comment

teepa Over a year ago

if I do indexes of a, they give me wrong things. For example, a[0] gives me black, red, blue. I would want it to give me black, 20, 10, 3, 1

teepa · Accepted Answer · 2017-11-14 11:47:54Z

0

I ended up with this and it is working.

def piirra_tiedostosta(tiedosto):
    with open(tiedosto) as source:
        for i in source.read().splitlines():
        c, a, r, n, w = i.split(",")
        a = int(a)
        r = int(r)
        n = float(n)
        w = int(w.strip())

Now I have all the variables separated from eachother, and I can call the function.

f(c, a, r, n, w)

answered Nov 14, 2017 at 11:47

teepa

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