It must be in an hw11 directory, which you must create inside a hw directory ins

Question

It must be in an hw11 directory, which you must create inside a hw directory inside you it116 directory.

Make sure the script obeys all the rules in the Script Requirements page.

Copy the file numbs.txt, which you will find in /home/ghoffman/course_files/it116_files into your hw11 directory .

Specification

The script must define 4 functions

read_file_into_integer_list

list_mean

list_median

list_range

read_file_into_integer_list

This functions must have the following header

This function must read in the numbers contained in a file, convert them to integers and add them to an array.
The function must return the array of integers it creates.

list_mean

This functions must have the following header

This function must calculate the average (mean) of the integers in a list.
It must return the the rounded average.

list_median

This functions must have the following header

This function must sort a list and return the value of the element in the middle of the list

list_range

This functions must have the following header

This function must return the difference between the highest and lowest number in a list.

Run code

At the bottom of the script you must have the following code

Testing

Your output should look like this

Be sure to run this script on the Unix machine so you know it works in the environment in which I will run it when I score your homework.

numbs.txt 46 19 35 43 35 33 42 6 25 6 19 31 1 23 14 18 24 24

Python Please.

Explanation / Answer

def read_file_into_integer_list( filename ):
   #assumes there is one word in each line
   file = open( filename, 'r' );
   listIs = [];
   for line in file:
       try:
           listIs.append( int(line) );
       except:
           pass;
   return listIs;

def list_mean( listIs ):
   mean = 0;
   for i in range(len(listIs)):
       mean = mean + listIs[i];
   mean = (mean*1.0)/len(listIs);
   return mean;

def list_median( listIs ):
   copyOfList =[];
   for i in listIs:
       copyOfList.append( i );
   copyOfList.sort();

   length = len(listIs);
   if( length%2 == 0 ):
       median = ( copyOfList[ int(length)/2 ] + copyOfList[ int(length)/2 - 1 ] )/2.0;
   else:
       median = copyOfList[ int(length)/2 ];
   return median;

def list_range( listIs ):
   maxIs = listIs[0];
   minIs = listIs[0];
   for x in listIs:
       maxIs = max( maxIs , x );
       minIs = min( minIs , x );
   return maxIs-minIs;

numbers = read_file_into_integer_list("numbs.txt");
print("numbers:             ", numbers);
print("list_mean(numbers): ", list_mean(numbers));
numbers.sort();
print("numbers:             ", numbers);
print("list_median(numbers):", list_median(numbers));
print("list_range(numbers): ", list_range(numbers));

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