The Python Library Reference 发布 2.7.18 Guido van Rossum and the Python development team 五月 20, 2020 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 Non-essential Built-in 10 dbhash —DBM-style interface to the BSD database library . . . . . . . . . . . . . . . . . . . . . . 323 11.11 bsddb —Interface to Berkeley DB library . . . . . . . . . . . . . . . . . . . . . . . . . platform —获取底层平台的标识数据 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556 15.16 errno —Standard errno system symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 560 15.17 ctypes

The Python Library Reference 发布 2.7.18 Guido van Rossum and the Python development team 五月 20, 2020 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 Non-essential Built-in 10 dbhash —DBM-style interface to the BSD database library . . . . . . . . . . . . . . . . . . . . . . 323 11.11 bsddb —Interface to Berkeley DB library . . . . . . . . . . . . . . . . . . . . . . . . . platform —获取底层平台的标识数据 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556 15.16 errno —Standard errno system symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 560 15.17 ctypes

The Python Library Reference 发布 2.7.18 Guido van Rossum and the Python development team 五月 20, 2020 Python Software Foundation Email: docs@python.org Contents 1 概述 3 2 内置函数 5 3 Non-essential Built-in 10 dbhash —DBM-style interface to the BSD database library . . . . . . . . . . . . . . . . . . . . . . 323 11.11 bsddb —Interface to Berkeley DB library . . . . . . . . . . . . . . . . . . . . . . . . . platform —获取底层平台的标识数据 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 556 15.16 errno —Standard errno system symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 560 15.17 ctypes

Tornado [http://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [http://friendfeed.com]. By using non-blocking network I/O, Tornado use of ThreadedResolver. It is needed only on Python 2; Python 3 includes this package in the standard library. pycurl [http://pycurl.sourceforge.net] is used by the optional tornado.curl_httpclient. Libcurl Introduction Tornado [http://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [http://friendfeed.com]. By using non-blocking network I/O, Tornado

Tornado [http://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [http://friendfeed.com]. By using non-blocking network I/O, Tornado 5+; Python 2 will no longer be supported). The updates to the ssl [https://docs.python.org/3.6/library/ssl.html#module-ssl] module in Python 2.7.9 are required (in some distributions, these updates may Introduction Tornado [http://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking

Tornado [https://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking with blocking code. asyncio Integration Tornado is integrated with the standard library asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] module and shares the same event loop (by since Tornado 5.0). In general, libraries designed for use with asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] can be mixed freely with Tornado. Installation pip install tornado

Tornado [https://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking with blocking code. asyncio Integration Tornado is integrated with the standard library asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] module and shares the same event loop (by since Tornado 5.0). In general, libraries designed for use with asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] can be mixed freely with Tornado. Installation pip install tornado

Tornado [https://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking with blocking code. asyncio Integration Tornado is integrated with the standard library asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] module and shares the same event loop (by since Tornado 5.0). In general, libraries designed for use with asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] can be mixed freely with Tornado. Installation pip install tornado

S3, local filesystem) Robust encoding support and auto-detection, for dealing with foreign, non- standard and broken encoding declarations. Strong extensibility support, allowing you to plug in your own efficient XML and HTML parser parsel [https://pypi.python.org/pypi/parsel], an HTML/XML data extraction library written on top of lxml, w3lib [https://pypi.python.org/pypi/w3lib], a multi-purpose helper for dealing you can also use the re() method to extract using regular expressions [https://docs.python.org/3/library/re.html]: >>> response.css('title::text').re(r'Quotes.*') ['Quotes to Scrape'] >>> response.css('title::text')

Tornado [https://www.tornadoweb.org] is a Python web framework and asynchronous networking library, originally developed at FriendFeed [https://en.wikipedia.org/wiki/FriendFeed]. By using non-blocking with blocking code. asyncio Integration Tornado is integrated with the standard library asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] module and shares the same event loop (by since Tornado 5.0). In general, libraries designed for use with asyncio [https://docs.python.org/3/library/asyncio.html#module-asyncio] can be mixed freely with Tornado. Installation pip install tornado