Globals Useful Functions and Classes Message Flashing JSON Support Template Rendering Configuration Stream Helpers Useful Internals Signals Class-Based Views URL Route Registrations View Function Options 'handlers': {'wsgi': { 'class': 'logging.StreamHandler', 'stream': 'ext://flask.logging.wsgi_errors_stream', 'formatter': 'default' }}, 'root': { 'level': 'INFO', handlers.html#logging.StreamHandler] to app.logger automatically. During requests, it will write to the stream specified by the WSGI server in environ['wsgi.errors'] (which is usually sys.stderr [https://docs

%(message)s', }}, 'handlers': {'wsgi': { 'class': 'logging.StreamHandler', 'stream': 'ext://flask.logging.wsgi_errors_stream', 'formatter': 'default' }}, 'root': { 'level': 'INFO', (continues on next Flask will add a StreamHandler to app.logger automatically. During requests, it will write to the stream specified by the WSGI server in environ['wsgi.errors'] (which is usually sys.stderr). Outside a request from flask import Response def stream_template(template_name, **context): app.update_template_context(context) t = app.jinja_env.get_template(template_name) rv = t.stream(context) rv.enable_buffering(5)