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finding the maximum and minimum

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Join Date: Dec 2008

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eplymale3043 eplymale3043 is offline

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finding the maximum and minimum

Dec 11th, 2008

Write a program that can read the students records from the file “scores.dat”. This program will find the maximum and the minimum student scores. The first line in the file is a header. Each line (starting from the second line) contains the records of one student separated by spaces. These records are: the last name, the first, name, the ID, and the score.

# ETHAN PLYMALE

def main():
infile = open(scores.dat, 'r')

# Finding the maximum

and now I do not know what to do?

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Join Date: Dec 2008

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eplymale3043 eplymale3043 is offline

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Re: finding the maximum and minimum

Dec 11th, 2008

# ETHAN PLYMALE

import string

def main():
infile = open(scores.dat, 'r')
infile.readline()

# Finding the maximum
for line in infile.readlines():
line = string.split(line)
score = line[3]
print score

i tried that but its not working.

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Join Date: Mar 2007

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solsteel

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Re: finding the maximum and minimum

Dec 11th, 2008

Please use code tags when posting code.

Are you receiving an error message? If so, please post it.

Initialize a maximum score variable (maxscore). Loop on the file object for line in file_obj: . Strip and split each line lineList = line.strip().split() . If the value of the score is greater than maxscore, update maxscore and save the line in another variable.

An alternative would be to read all the lines, each stripped and split, into a list and sort the list.

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Join Date: Oct 2006

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sneekula

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Re: finding the maximum and minimum

Dec 11th, 2008

Please use code tags for your code.

You are getting close, but you need to find if the score is a new minimum or maximum each time through the loop. Something like this:

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infile = open("test_scores.dat", "r")
mylist = infile.readlines()
infile.close()
 
# remove the header, first item in the list
del mylist[0]
 
max_score = 0
min_score = 100
for line in mylist:
    # split each line into a list at space/whitespace and unpack
    last_name, first_name, ID, score = line.split()
    # for testing only
    print last_name, first_name, ID, score
    # create integer scores
    if score.isdigit():
        score = int(score)
        # check if it is a new max
        if score > max_score:
            max_score = score
        # check if it is a new min
        elif score < min_score:
            min_score = score
infile = open("test_scores.dat", "r")
mylist = infile.readlines()
infile.close()

# remove the header, first item in the list
del mylist[0]

max_score = 0
min_score = 100
for line in mylist:
    # split each line into a list at space/whitespace and unpack
    last_name, first_name, ID, score = line.split()
    # for testing only
    print last_name, first_name, ID, score
    # create integer scores
    if score.isdigit():
        score = int(score)
        # check if it is a new max
        if score > max_score:
            max_score = score
        # check if it is a new min
        elif score < min_score:
            min_score = score