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 PyPI [https://pypi.python.org/pypi/tornado], release notes) Source (github) [https://github.com/tornadoweb/tornado] Mailing lists: discussion [http://groups.google.com/group/python-tornado] and announcements announcements [http://groups.google.com/group/python-tornado-announce] Stack Overflow [http://stackoverflow.com/questions/tagged/tornado] Wiki [https://github.com/tornadoweb/tornado/wiki/Links] Hello, world

. . . . . . . . . . 157 6 Discussion and support 227 Python Module Index 229 i ii Tornado Documentation, Release 5.1.1 Tornado is a Python web framework and asynchronous networking library, originally Release 5.1.1 6 Chapter 2. Hello, world CHAPTER 3 Threads and WSGI Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process Prerequisites: Tornado 5.x runs on Python 2.7, and 3.4+ (Tornado 6.0 will require Python 3.5+; Python 2 will no longer be supported). The updates to the ssl module in Python 2.7.9 are required (in some distributions

. . . . . . . . 153 7 Discussion and support 229 Python Module Index 231 Index 233 i ii Tornado Documentation, Release 6.1 Tornado is a Python web framework and asynchronous networking library, Release 6.1 6 Chapter 2. Hello, world CHAPTER 3 Threads and WSGI Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process clone the git repository as well. Prerequisites: Tornado 6.0 requires Python 3.5.2 or newer (See Tornado 5.1 if compatibility with Python 2.7 is required). The following optional packages may be useful: •

. . . . . . . 150 7 Discussion and support 229 Python Module Index 231 Index 233 i ii Tornado Documentation, Release 6.0.4 Tornado is a Python web framework and asynchronous networking library 0.4 6 Chapter 2. Hello, world CHAPTER THREE THREADS AND WSGI Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process clone the git repository as well. Prerequisites: Tornado 6.0 requires Python 3.5.2 or newer (See Tornado 5.1 if compatibility with Python 2.7 is required). The following optional packages may be useful: •

. . . . . . . . . . 147 5 Discussion and support 207 Python Module Index 209 i ii Tornado Documentation, Release 4.5.3 Tornado is a Python web framework and asynchronous networking library, originally source tarball or clone the git repository as well. Prerequisites: Tornado runs on Python 2.7, and 3.3+ For Python 2, version 2.7.9 or newer is strongly recommended for the improved SSL support. In addition thread pool for use with Tornado and enables the use of ThreadedResolver. It is needed only on Python 2; Python 3 includes this package in the standard library. • pycurl is used by the optional tornado.curl_httpclient

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 PyPI [https://pypi.python.org/pypi/tornado], release notes) Source (github) [https://github.com/tornadoweb/tornado] Mailing lists: discussion [http://groups.google.com/group/python-tornado] and announcements announcements [http://groups.google.com/group/python-tornado-announce] Stack Overflow [http://stackoverflow.com/questions/tagged/tornado] Wiki [https://github.com/tornadoweb/tornado/wiki/Links] Hello, world

. . . . . . . . 164 7 Discussion and support 251 Python Module Index 253 Index 255 i ii Tornado Documentation, Release 6.4 Tornado is a Python web framework and asynchronous networking library, 6.4 6 Chapter 2. Hello, world CHAPTER THREE THREADS AND WSGI Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process copy of the source tarball or clone the git repository as well. Prerequisites: Tornado 6.3 requires Python 3.8 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado

. . . . . . . . 164 7 Discussion and support 251 Python Module Index 253 Index 255 i ii Tornado Documentation, Release 6.4 Tornado is a Python web framework and asynchronous networking library, 6.4 6 Chapter 2. Hello, world CHAPTER THREE THREADS AND WSGI Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process copy of the source tarball or clone the git repository as well. Prerequisites: Tornado 6.3 requires Python 3.8 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado

. . . . . . . . 164 7 Discussion and support 251 Python Module Index 253 Index 255 i ii Tornado Documentation, Release 6.4 Tornado is a Python web framework and asynchronous networking library, 6.4 6 Chapter 2. Hello, world CHAPTER THREE THREADS AND WSGI Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process copy of the source tarball or clone the git repository as well. Prerequisites: Tornado 6.3 requires Python 3.8 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado

. . . . . . . . 162 7 Discussion and support 243 Python Module Index 245 Index 247 i ii Tornado Documentation, Release 6.2 Tornado is a Python web framework and asynchronous networking library, 6.2 6 Chapter 2. Hello, world CHAPTER THREE THREADS AND WSGI Tornado is different from most Python web frameworks. It is not based on WSGI, and it is typically run with only one thread per process copy of the source tarball or clone the git repository as well. Prerequisites: Tornado 6.2 requires Python 3.7 or newer. The following optional packages may be useful: • pycurl is used by the optional tornado