The document discusses the upcoming release of Python 3.3, which includes a number of changes and improvements compared to previous versions. Key dates are listed for alpha, beta, and final releases of Python 3.3 between March 2012 and August 2012. Several new features or changes are briefly mentioned, such as simplifying the IOError hierarchy, adding yield from to allow subgenerators, and distinguishing between byte strings and Unicode strings.

1. Python 3.3
ふるかわとおる

2. おまえ誰よ
• @torufurukawa
• 古川亨
• 株式会社バスキュール号

3. リリースが近づいてまいりました
3.3.0 alpha 1: March 3, 2012
3.3.0 alpha 2: March 31, 2012
3.3.0 alpha 3: April 28, 2012
3.3.0 alpha 4: May 26, 2012
3.3.0 beta 1: June 23, 2012
(No new features beyond this point.)
3.3.0 beta 2: July 14, 2012
3.3.0 candidate 1: July 28, 2012
3.3.0 candidate 2: August 11, 2012
3.3.0 final: August 18, 2012

4. リリースが近づいてまいりました
3.3.0 alpha 1: March 3, 2012
3.3.0 alpha 2: March 31, 2012
3.3.0 alpha 3: April 28, 2012
3.3.0 alpha 4: May 26, 2012
3.3.0 beta 1: June 23, 2012
(No new features beyond this point.)
3.3.0 beta 2: July 14, 2012
3.3.0 candidate 1: July 28, 2012
3.3.0 candidate 2: August 11, 2012
3.3.0 final: August 18, 2012

5. リリースが近づいてまいりました
3.3.0 alpha 1: March 3, 2012
3.3.0 alpha 2: March 31, 2012
3.3.0 alpha 3: April 28, 2012
3.3.0 alpha 4: May 26, 2012
3.3.0 beta 1: June 23, 2012
(No new features beyond this point.)
3.3.0 beta 2: July 14, 2012
3.3.0 candidate 1: July 28, 2012
3.3.0 candidate 2: August 11, 2012
3.3.0 final: August 18, 2012

7. チラ見

8. 【u】文字列【またぁ？】

9. u

10. u
Python 3.2

11. u
Python 3.2
>>> 'ほげ'

12. u
Python 3.2
>>> 'ほげ'
'ほげ'

13. u
Python 3.2
>>> 'ほげ'
'ほげ'
>>> u'ほげ'

14. u
Python 3.2
>>> 'ほげ'
'ほげ'
>>> u'ほげ'
File "<stdin>", line 1

15. u
Python 3.2
>>> 'ほげ'
'ほげ'
>>> u'ほげ'
File "<stdin>", line 1
u'ほげ'

16. u
Python 3.2
>>> 'ほげ'
'ほげ'
>>> u'ほげ'
File "<stdin>", line 1
u'ほげ'
^

17. u
Python 3.2
>>> 'ほげ'
'ほげ'
>>> u'ほげ'
File "<stdin>", line 1
u'ほげ'
^
SyntaxError: invalid syntax

18. u
Python 3.2 Python 3.3
>>> 'ほげ'
'ほげ'
>>> u'ほげ'
File "<stdin>", line 1
u'ほげ'
^
SyntaxError: invalid syntax

19. u
Python 3.2 Python 3.3
>>> 'ほげ' >>> 'ほげ'
'ほげ'
>>> u'ほげ'
File "<stdin>", line 1
u'ほげ'
^
SyntaxError: invalid syntax

20. u
Python 3.2 Python 3.3
>>> 'ほげ' >>> 'ほげ'
'ほげ' 'ほげ'
>>> u'ほげ'
File "<stdin>", line 1
u'ほげ'
^
SyntaxError: invalid syntax

21. u
Python 3.2 Python 3.3
>>> 'ほげ' >>> 'ほげ'
'ほげ' 'ほげ'
>>> u'ほげ' >>> u'ほげ'
File "<stdin>", line 1
u'ほげ'
^
SyntaxError: invalid syntax

22. u
Python 3.2 Python 3.3
>>> 'ほげ' >>> 'ほげ'
'ほげ' 'ほげ'
>>> u'ほげ' >>> u'ほげ'
File "<stdin>", line 1 'ほげ'
u'ほげ'
^
SyntaxError: invalid syntax

23. u
Python 3.2 Python 3.3
>>> 'ほげ' >>> 'ほげ'
'ほげ' 'ほげ'
>>> u'ほげ' >>> u'ほげ'
File "<stdin>", line 1 'ほげ'
u'ほげ' >>> 'ほげ' == u'ほげ'
^
SyntaxError: invalid syntax

24. u
Python 3.2 Python 3.3
>>> 'ほげ' >>> 'ほげ'
'ほげ' 'ほげ'
>>> u'ほげ' >>> u'ほげ'
File "<stdin>", line 1 'ほげ'
u'ほげ' >>> 'ほげ' == u'ほげ'
^ True
SyntaxError: invalid syntax

25. non-BMP Unicode 文字

26. non-BMP Unicode 文字
Python 3.2
>>> 'U0001F344'
>>> len(x)
2
>>> x[0], x[1]
('ud83c', 'udf4c')

27. non-BMP Unicode 文字
Python 3.2 Python 3.3
>>> 'U0001F344' >>> x = 'U0001F344'
>>> len(x) >>> len(x)
2 1
>>> x[0], x[1] >>> x[0]
('ud83c', 'udf4c') 'ud83c'

28. 【yield】サブジェネレータ【next】

30. >>> def g():

31. >>> def g():
... yield 'START'

32. >>> def g():
... yield 'START'
... for i in range(5):

33. >>> def g():
... yield 'START'
... for i in range(5):
... yield i

34. >>> def g():
... yield 'START'
... for i in range(5):
... yield i
... yield 'END'

35. >>> def g():
... yield 'START'
... for i in range(5):
... yield i
... yield 'END'
...

36. >>> def g():
... yield 'START'
... for i in range(5):
... yield i
... yield 'END'
...
>>> list(g())

37. >>> def g():
... yield 'START'
... for i in range(5):
... yield i
... yield 'END'
...
>>> list(g())
['START', 0, 1, 2, 3, 4, 'END']

38. サブジェネレータ

39. サブジェネレータ
>>> def g():

40. サブジェネレータ
>>> def g():
... yield 'START'

41. サブジェネレータ
>>> def g():
... yield 'START'
... yield from range(5)

42. サブジェネレータ
>>> def g():
... yield 'START'
... yield from range(5)
... yield 'END'

43. サブジェネレータ
>>> def g():
... yield 'START'
... yield from range(5)
... yield 'END'
...

44. サブジェネレータ
>>> def g():
... yield 'START'
... yield from range(5)
... yield 'END'
...
>>> list(g())

45. サブジェネレータ
>>> def g():
... yield 'START'
... yield from range(5)
... yield 'END'
...
>>> list(g())
['START', 0, 1, 2, 3, 4, 'END']

46. 細々ときれいになる

47. IOError のヒエラルキーがひどい
+-- EnvironmentError
+-- IOError
+-- io.BlockingIOError
+-- io.UnsupportedOperation
+-- socket.error
+-- socket.gaierror
+-- socket.herror
+-- socket.timeout
+-- OSError
+-- VMSError
+-- WindowsError
+-- mmap.error
+-- select.error

48. シンプルに
+-- OSError (replacing IOError, WindowsError,
EnvironmentError, etc.)
+-- io.BlockingIOError
+-- io.UnsupportedOperation
+-- socket.gaierror
+-- socket.herror
+-- socket.timeout

49. distutils から packaging へ

50. さよなら
OS/2, VMS, Windows 2000

51. 以上、チラ見せでした

52. まだ控えている PEP があります
PEP 362: Function Signature Object
PEP 395: Module Aliasing
PEP 397: Python launcher for Windows
PEP 402: Simplified Package Layout (likely a new PEP derived from it)
PEP 405: Python Virtual Environments
PEP 412: Key-Sharing Dictionary
PEP 3143: Standard daemon process library
PEP 3144: IP Address manipulation library
Other planned large-scale changes:
Addition of the "mock" library
Addition of the C decimal implementation
Addition of the "regex" module
Email version 6
Implementing __import__ using importlib
A standard event-loop interface (PEP by Jim Fulton pending)
Breaking out standard library and docs in separate repos?

53. PEP 3143: Standard
daemon process library
import daemon
from spam import do_main_program
with daemon.DaemonContext():
do_main_program()

54. PEP 405: Python
Virtual Environments
python3 -m venv /wozozo

55. Python 3.3 をよろしく