2: This function existed in prior versions but was broken and undocumented until 4.2. 5.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

changes in development tornado.concurrent — Work with Future objects tornado.log — Logging support tornado.options — Command-line parsing tornado.stack_context — Exception handling across asynchronous callbacks changes in development tornado.concurrent — Work with Future objects tornado.log — Logging support tornado.options — Command-line parsing Global functions OptionParser class tornado.stack_context — Exception version 4.2: This function existed in prior versions but was broken and undocumented until 4.2. tornado.options — Command-line parsing A command line parsing module that lets modules define their own options

2: This function existed in prior versions but was broken and undocumented until 4.2. 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

2: This function existed in prior versions but was broken and undocumented until 4.2. 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") Tornado Documentation, Release 6.2 (continued from previous page) # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

2: This function existed in prior versions but was broken and undocumented until 4.2. 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

2: This function existed in prior versions but was broken and undocumented until 4.2. 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

2: This function existed in prior versions but was broken and undocumented until 4.2. 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

broken and undocumented until 4.2. 6.7. Utilities 151Tornado Documentation, Release 6.5.1 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

2: This function existed in prior versions but was broken and undocumented until 4.2. 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():

2: This function existed in prior versions but was broken and undocumented until 4.2. 6.7.4 tornado.options — Command-line parsing A command line parsing module that lets modules define their own options The options are then accessible as attributes of tornado.options.options: # myapp/db.py from tornado.options import define, options define("mysql_host", default="127.0.0.1:3306", help="Main user DB") servers") def connect(): db = database.Connection(options.mysql_host) ... # myapp/server.py from tornado.options import define, options define("port", default=8080, help="port to listen on") def start_server():