IOLoop.spawn_callback, which makes the IOLoop responsible for the call. If it fails, the IOLoop will log a stack trace: # The IOLoop will catch the exception and print a stack trace in # the logs. Note that because the routing table does not change at runtime and is presumed to be permanent, while redirects found in handlers are likely to be the result of other logic that may change. To send a temporary redirect produce their own signed cookies. By default, Tornado’s signed cookies expire after 30 days. To change this, use the expires_days keyword argument to set_signed_cookie and the max_age_days argument to

Automatically detect code changes in development tornado.concurrent — Work with Future objects tornado.log — Logging support tornado.options — Command-line parsing tornado.testing — Unit testing support for IOLoop.spawn_callback, which makes the IOLoop responsible for the call. If it fails, the IOLoop will log a stack trace: # The IOLoop will catch the exception and print a stack trace in # the logs. Note because the routing table does not change at runtime and is presumed to be permanent, while redirects found in handlers are likely to be the result of other logic that may change. To send a temporary redirect

. . . . . . . 1345 78 Logging 1361 78.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1362 78.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1363 78.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1364 78.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1503 98.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1507 98.5 Other Test

. . . . . . . 1345 78 Logging 1361 78.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1362 78.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1363 78.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1364 78.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1503 98.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1507 98.5 Other Test

. . . . . . . 1573 80 Logging 1593 80.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1594 80.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1595 80.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1596 80.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1778 102.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1782 102.5 Other Test

. . . . . . . 1654 82 Logging 1656 82.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1657 82.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1658 82.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1659 82.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1829 103.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1833 103.5 Other Test

. . . . . . . 1573 80 Logging 1593 80.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1594 80.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1595 80.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1596 80.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1778 102.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1782 102.5 Other Test

. . . . . . . 1573 80 Logging 1593 80.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1594 80.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1595 80.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1596 80.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1778 102.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1782 102.5 Other Test

. . . . . . . 1652 82 Logging 1654 82.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1655 82.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1656 82.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1657 82.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1827 103.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1831 103.5 Other Test

. . . . . . . 1651 82 Logging 1653 82.1 Log event structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1654 82.2 Processing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1655 82.3 Testing log events . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1656 82.4 Environment variables . . . . . . . . . . . . . . . . . . with Test Sets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1826 103.4 Testing Log Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1830 103.5 Other Test