Python - Functions and Generators(Scopes)

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 III.(Functions and Generators)、CHAPTER 17(Scopes)、Test Your Knowledge: Quiz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))

Test Your Knowledge: Quiz

入出力結果(Terminal)

$ python3
Python 3.3.4 (default, Feb 10 2014, 22:06:52) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> x = 'spam'
>>> def f():x='NI!'
... 
>>> f()
>>> x # spam
'spam'
>>> quit()
bash-4.2$ python3
Python 3.3.4 (default, Feb 10 2014, 22:06:52) 
[GCC 4.2.1 Compatible Apple LLVM 5.0 (clang-500.2.79)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> x='spam'
>>> def f():print(x)
... 
>>> f() # spam
spam
>>> x
'spam'
>>> def f():x='ni!'
... 
>>> f()
>>> print(x) # spam
spam
>>> x
'spam'
>>> def f():x='ni';print(x)
... 
>>> f() # ni
ni
>>> x # spam
'spam'
>>> def f():global x;x='ni'
... 
>>> f()
>>> x # ni
'ni'
>>> x='spam'
>>> x
'spam'
>>> def f():
...     x = 'ni'
...     def nested():
...         print(x)
...     nested()
... 
>>> f() # ni
ni
>>> def f():
...     x = 'ni'
...     def nested():
...         nonlocal x
...         x = 'spam'
...     nested()
...     print(x)
... 
>>> f() # spam
spam
>>> def f():
...     x = 10
...     def g():
...         nonlocal x
...         x += 1
...         print(x)
...     return g
... 
>>> a = f()
>>> a()
11
>>> a()
12
>>> a()
13
>>> a()
14
>>> a()
15
>>> 
$