大约有 9,000 项符合查询结果（耗时：0.0237秒） [XML]
Select by partial string from a pandas DataFrame
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col
1 foobar
DataFrame.query
Supports string methods through the python engine. This offers no visible performance benefits, but is nonetheless useful to know if you need to dynamically generate your queries.
df1.query('col.str.contains("foo")', engine='python')
col
0 foo
1 foo...
Interface/enum listing standard mime-type constants
...nswered Jun 22 '13 at 11:36
François WauquierFrançois Wauquier
53433 silver badges99 bronze badges
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How do I sort an array of hashes by a value in the hash?
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Ruby's sort doesn't sort in-place. (Do you have a Python background, perhaps?)
Ruby has sort! for in-place sorting, but there's no in-place variant for sort_by in Ruby 1.8. In practice, you can do:
sorted = sort_me.sort_by { |k| k["value"] }
puts sorted
As of Ruby 1.9+, .so...
Python 2.7: Print to File
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If you want to use the print function in Python 2, you have to import from __future__:
from __future__ import print_function
But you can have the same effect without using the function, too:
print >>f1, 'This is a test'
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How can I scroll to a specific location on the page using jquery?
...d Aug 19 '14 at 21:30
Luiz PicançoLuiz Picanço
15011 silver badge77 bronze badges
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How to list imported modules?
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If you want to do this from outside the script:
Python 2
from modulefinder import ModuleFinder
finder = ModuleFinder()
finder.run_script("myscript.py")
for name, mod in finder.modules.iteritems():
print name
Python 3
from modulefinder import ModuleFinder
finder = M...
Using C# to check if string contains a string in string array
...ed May 13 '19 at 19:39
Jean-François Fabre♦
122k1111 gold badges9797 silver badges156156 bronze badges
answered Sep 1 '15 at 12:14
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Why use pip over easy_install? [closed]
...u can pip install ., pip install git+https://.
pip comes with the official Python 2.7 and 3.4+ packages from python.org, and a pip bootstrap is included by default if you build from source.
The various incomplete bits of documentation on installing, using, and building packages have been replaced by...
postgresql - sql - count of `true` values
... May 19 '16 at 21:28
Ilja EveriläIlja Everilä
36.6k55 gold badges7272 silver badges8686 bronze badges
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Overriding a Rails default_scope
... answered Dec 2 '09 at 16:50
Pär WieslanderPär Wieslander
26.1k55 gold badges4747 silver badges5050 bronze badges
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