Python - Modules and Packages(Import basics)

Learning Python
(Oreilly & Associates Inc)
Mark Lutz (著)
(邦訳版)

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)

Learning Python (Mark Lutz (著)、Oreilly & Associates Inc)のPART V.(Modules and Packages)、Test Your Knowledge: Part V Exercises 1(Import basics)を解いてみる。

その他参考書籍

• Pythonチュートリアル 第2版
• Python クックブック 第2版 (原書(最新版))

1(Import basics)

コード(BBEdit)

mymod.py

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

import sys

def countLines1(name):
    with open(name) as f:
        count = len(f.readlines())
    return count

def countChars1(name):
    with open(name) as f:
        count = len(f.read())
    return count

def test1(name):
    return {'lines':countLines1(name), 'chars':countChars1(name)}

def countLines2(file):
    return len(file.readlines())
    
def countChars2(file):
    return len(file.read())

def test2(name):
    with open(name) as f:
        lines = countLines2(f)
        f.seek(0)
        chars = len(f.read())
    return {'lines':lines, 'chars':chars}

if __name__ == '__main__':
    try:
        name = sys.argv[1]
    except:
        name = 'mymod.py'
    print(test1(name))
    print(test2(name))

入出力結果(Terminal)

$ python3
Python 3.3.5 (default, Mar 15 2014, 14:51:54) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import mymod
>>> name = 'mymod.py'
>>> mymod.test1(name)
{'lines': 38, 'chars': 767}
>>> mymod.test2(name)
{'lines': 38, 'chars': 767}
>>> quit()
$ ./mymod.py
{'chars': 767, 'lines': 38}
{'chars': 767, 'lines': 38}
$ ./mymod.py sample.py
{'lines': 25, 'chars': 444}
{'lines': 25, 'chars': 444}
$ wc -cl mymod.py
      38     767 mymod.py
$ wc -cl sample.py
      25     444 sample.py
$