sample.go

package main

/*
  Here is a sample construct that reads a file name supplied as an argument and
  allows you, the programmer, to easily work with the supplied parameters. Have Fun!
*/

import (
  "bufio"
  "os"
  //"strconv"
  "strings"
)

func main() {

	// Open your file using the second command line arguement becuase the binary name is the first.
	file, err := os.Open(os.Args[1])

	// Anticipate errors
	if err == nil {

		reader := bufio.NewReader(file)
		str, err := reader.ReadString('\n')

		for err == nil {
			parameters := strings.Split(strings.Trim(s, "\n"), " ")

			// Parameters is a slice of strings that represent the space delimited
			// items located on each line of the file.

			// At this point you would parse your strings if you need a different type ie
			// a := strconv.Atoi(params[0])

			// In my applicaitons I have used a single funciton to perform the proper action 
			// and return the anticipated result which is printed ie:
			// fmt.Println(a)

			str, err = reader.ReadString('\n')
    	}
	} else {
		// You can catch file propblems if you want. It is proper... :)
	}
}

sample.py

# On CodeEval, test cases are read in from a file which is the first argument to your program
# Open the file and read in line by line. Each line represents a different test case
# (unless given different instructions in the challenge description)

import sys

test_cases = open(sys.argv[1], 'r')

for test in test_cases:
    # ignore test if it is an empty line
    # 'test' represents the test case, do something with it
    # ...
    # ...

test_cases.close()