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解决Scrapy警告:You do not have a working installation of the service_i...
...要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https://pypi.py...
解决Scrapy警告:You do not have a working installation of the service_i...
...要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https://pypi.py...
解决Scrapy警告:You do not have a working installation of the service_i...
...要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https://pypi.py...
解决Scrapy警告:You do not have a working installation of the service_i...
...要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https://pypi.py...
解决Scrapy警告:You do not have a working installation of the service_i...
...要安装一个模块service_identity，根据提示地址（https: pypi python org pypi service_identity）来安装 使用scrapy进行爬虫项目的操作时，出现如下错误：
从提示错误来看，我们需要安装一个模块service_identity，根据提示地址（https://pypi.py...
Lock, mutex, semaphore… what's the difference?
...gle process. This depends on the pshared argument provided to sem_init.
python (threading.py)
A lock (threading.RLock) is mostly the same as C/C++ pthread_mutex_ts. Both are both reentrant. This means they may only be unlocked by the same thread that locked it. It is the case that sem_t semapho...
How to get a reference to a module inside the module itself?
...ler:
current_module = __import__(__name__)
Be aware there is no import. Python imports each module only once.
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how to unit test file upload in django
...pp:some_view'), {'video': video})
# some important assertions ...
In Python 3.5+ you need to use bytes object instead of str. Change "file_content" to b"file_content"
It's been working fine, SimpleUploadedFile creates an InMemoryFile that behaves like a regular upload and you can pick the nam...
Split string based on a regular expression
...gt;>> str1.split()
['a', 'b', 'c', 'd']
Docs are here: http://docs.python.org/library/stdtypes.html#str.split
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What does “Splats” mean in the CoffeeScript tutorial?
...
if you know python, args... roughly similar to *args, as it allows you to treat function parameters as list
for example:
concat = (args...) -> args.join(', ')
concat('hello', 'world') == 'hello, world'
concat('ready', 'set', 'go!') ...