TestLongestWord.py

#!/usr/bin/python
#TestLongestWord.py
#Python 3.4
#Chris Clarke
#03.11.2015

def longestWord(inF, outF):
    outStr = ""
    try:
        with open(inF) as f:
            for line in f:
                words = line.split()
                maxLength = 0
                for word in words:
                    if len (word)>maxLength:
                        maxLength = len(word)
                if maxLength>0:
                    outStr += str(maxLength) + "\n"
    except IOError:
        print("Error: can't open file")

    try:
        fw = open(outF, "w")
        fw.write(outStr)
    except IOError:
        print ("Error: can't write to file")
    else:
        fw.close()

def main():
    longestWord("trouble.txt", "troubleLongest.txt")

main()