大约有 46,000 项符合查询结果（耗时：0.0597秒） [XML]
What is the best comment in source code you have ever encountered? [closed]
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Best way to load module/class from lib folder in Rails 3?
Since the latest Rails 3 release is not auto-loading modules and classes from lib anymore,
what would be the best way to load them?
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Dictionaries and default values
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323
Like this:
host = connectionDetails.get('host', someDefaultValue)
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Why do we need tuples in Python (or any immutable data type)?
...e:
$ python -mtimeit '["fee", "fie", "fo", "fum"]'
1000000 loops, best of 3: 0.432 usec per loop
$ python -mtimeit '("fee", "fie", "fo", "fum")'
10000000 loops, best of 3: 0.0563 usec per loop
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How to shift a column in Pandas DataFrame
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In [18]: a
Out[18]:
x1 x2
0 0 5
1 1 6
2 2 7
3 3 8
4 4 9
In [19]: a.x2 = a.x2.shift(1)
In [20]: a
Out[20]:
x1 x2
0 0 NaN
1 1 5
2 2 6
3 3 7
4 4 8
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How to remove all listeners in an element? [duplicate]
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3 Answers
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Install a module using pip for specific python version
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NoobEditor
13.6k1111 gold badges6060 silver badges9494 bronze badges
answered Jun 6 '12 at 18:13
Charles DuffyCha...
How to join two generators in Python?
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answered Jul 9 '10 at 8:30
PhilippPhilipp
42k1010 gold badges7777 silver badges102102 bronze badges
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find vs find_by vs where
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JohnJohn
3,16622 gold badges2020 silver badges3535 bronze badges
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What is __init__.py for?
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It used to be a required part of a package (old, pre-3.3 "regular package", not newer 3.3+ "namespace package").
Here's the documentation.
Python defines two types of packages, regular packages and namespace packages. Regular packages are traditional packages as they exist...