Python -data in files and arrays(open, for, close)

Head First Programming
A learner's guide to programming
using the Python language
( O'Reilly Media; )
David Griffiths (著) Paul Barry (著)

開発環境

• OS X Mavericks - Apple(OS)
• Emacs (CUI)、BBEdit - Bare Bones Software, Inc. (GUI) (Text Editor)
• Python (プログラミング言語)

Head First Programming A learner's guide to programming using the Python language (David Griffiths(著)、Paul Barry(著)、 O'Reilly Media; )のChapter 4(data in files and arrays: Sort it out)、Code Magnet(p.117)を解いてみる。

Code Magnet(p.117)

コード(BBEdit)

sample97,.py

#!/usr/bin/env python3
#-*- coding: utf-8

highest_score = 0
result_f = open('results.txt')
for line in result_f:
    score = float(line)
    if score > highest_score:
        highest_score = score
result_f.close()
print('The highest score was: {0}'.format(highest))

入出力結果(Terminal)

$ ./sample117.py 
Traceback (most recent call last):
  File "./sample117.py", line 7, in <module>
    score = float(line)
ValueError: could not convert string to float: 'Johnny  8.65 \n'
$