大约有 40,000 项符合查询结果(耗时:0.0420秒) [XML]

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When should I use ugettext_lazy?

I have a question about using ugettext and ugettext_lazy for translations. I learned that in models I should use ugettext_lazy , while in views ugettext. But are there any other places, where I should use ugettext_lazy too? What about form definitions? Are there any performance diffrences betwe...
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Quick easy way to migrate SQLite3 to MySQL? [closed]

...two file formats: The lines starting with: BEGIN TRANSACTION COMMIT sqlite_sequence CREATE UNIQUE INDEX are not used in MySQL SQLite uses CREATE TABLE/INSERT INTO "table_name" and MySQL uses CREATE TABLE/INSERT INTO table_name MySQL doesn't use quotes inside the schema definition MySQL uses singl...
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Is there a difference between “==” and “is”?

... most cases this logic is true, but it relies on the implementation of the __eq__ special method. As the docs say, The default behavior for equality comparison (== and !=) is based on the identity of the objects. Hence, equality comparison of instances with the same identity results in equa...
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WPF OpenFileDialog with the MVVM pattern? [duplicate]

...ou would consume it. public MyViewModel : ViewModel { private string _selectedPath; public string SelectedPath { get { return _selectedPath; } set { _selectedPath = value; OnPropertyChanged("SelectedPath"); } } private RelayCommand _openCommand; pu...
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Why is there no xrange function in Python3?

...tion has nothing to do with it. (Not surprising, as a one-time call to the __iter__ slot isn't likely to be visible among 10000000 calls to whatever happens in the loop, but someone brought it up as a possibility.) But it's only 30% slower. How did the OP get 2x as slow? Well, if I repeat the same ...
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What is the difference between require_relative and require in Ruby?

What is the difference between require_relative and require in Ruby? 7 Answers 7 ...
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Remove duplicate dict in list in Python

... {'a': 3222, 'b': 1234}, {'a': 123, 'b': 1234}] seen = set() new_l = [] for d in l: t = tuple(d.items()) if t not in seen: seen.add(t) new_l.append(d) print new_l Example output: [{'a': 123, 'b': 1234}, {'a': 3222, 'b': 1234}] Note: As pointed out by @alexis ...
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Can I create links with 'target=“_blank”' in Markdown?

...d, you'll just have to use HTML. <a href="http://example.com/" target="_blank">Hello, world!</a> Most Markdown engines I've seen allow plain old HTML, just for situations like this where a generic text markup system just won't cut it. (The StackOverflow engine, for example.) They then...
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Adding new column to existing DataFrame in Python pandas

...17438 0.847941 0.034235 -0.448948 2.228131 >>> p.version.short_version '0.16.1' The SettingWithCopyWarning aims to inform of a possibly invalid assignment on a copy of the Dataframe. It doesn't necessarily say you did it wrong (it can trigger false positives) but from 0.13.0 it let yo...
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libpthread.so.0: error adding symbols: DSO missing from command line

....o \ lib/libopenvswitch.a \ /home/jyyoo/src/dpdk/build/lib/librte_eal.a /home/jyyoo/src/dpdk/build/lib/libethdev.a /home/jyyoo/src/dpdk/build/lib/librte_cmdline.a /home/jyyoo/src/dpdk/build/lib/librte_hash.a /home/jyyoo/src/dpdk/build/lib/librte_lpm.a /home/jyyoo/src/dpdk/build/lib/librte_...