42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
"""
|
|
# tag::FUNC_DESCRIPTOR_DEMO[]
|
|
|
|
>>> word = Text('forward')
|
|
>>> word # <1>
|
|
Text('forward')
|
|
>>> word.reverse() # <2>
|
|
Text('drawrof')
|
|
>>> Text.reverse(Text('backward')) # <3>
|
|
Text('drawkcab')
|
|
>>> type(Text.reverse), type(word.reverse) # <4>
|
|
(<class 'function'>, <class 'method'>)
|
|
>>> list(map(Text.reverse, ['repaid', (10, 20, 30), Text('stressed')])) # <5>
|
|
['diaper', (30, 20, 10), Text('desserts')]
|
|
>>> Text.reverse.__get__(word) # <6>
|
|
<bound method Text.reverse of Text('forward')>
|
|
>>> Text.reverse.__get__(None, Text) # <7>
|
|
<function Text.reverse at 0x101244e18>
|
|
>>> word.reverse # <8>
|
|
<bound method Text.reverse of Text('forward')>
|
|
>>> word.reverse.__self__ # <9>
|
|
Text('forward')
|
|
>>> word.reverse.__func__ is Text.reverse # <10>
|
|
True
|
|
|
|
# end::FUNC_DESCRIPTOR_DEMO[]
|
|
"""
|
|
|
|
# tag::FUNC_DESCRIPTOR_EX[]
|
|
import collections
|
|
|
|
|
|
class Text(collections.UserString):
|
|
|
|
def __repr__(self):
|
|
return 'Text({!r})'.format(self.data)
|
|
|
|
def reverse(self):
|
|
return self[::-1]
|
|
|
|
# end::FUNC_DESCRIPTOR_EX[]
|