logging.basicConfig(**kwargs)
Does basic configuration for the logging system by creating a StreamHandler with a default Formatter and adding it to the root logger. The functions debug(), info(), warning(), error() and critical() will call basicConfig() automatically if no handlers are defined for the root logger.
This function does nothing if the root logger already has handlers configured for it.
Note
This function should be called from the main thread before other threads are started. In versions of Python prior to 2.7.1 and 3.2, if this function is called from multiple threads, it is possible (in rare circumstances) that a handler will be added to the root logger more than once, leading to unexpected results such as messages being duplicated in the log.
The following keyword arguments are supported.
| Format | Description |
|---|---|
filename | Specifies that a FileHandler be created, using the specified filename, rather than a StreamHandler. |
filemode | Specifies the mode to open the file, if filename is specified (if filemode is unspecified, it defaults to ‘a’). |
format | Use the specified format string for the handler. |
datefmt | Use the specified date/time format. |
style | If format is specified, use this style for the format string. One of ‘%’, ‘{‘ or ‘$’ for %-formatting, str.format() or string.Template respectively, and defaulting to ‘%’ if not specified. |
level | Set the root logger level to the specified level. |
stream | Use the specified stream to initialize the StreamHandler. Note that this argument is incompatible with ‘filename’ - if both are present, a ValueError is raised. |
handlers | If specified, this should be an iterable of already created handlers to add to the root logger. Any handlers which don’t already have a formatter set will be assigned the default formatter created in this function. Note that this argument is incompatible with ‘filename’ or ‘stream’ - if both are present, a ValueError is raised. |
Changed in version 3.2: The style argument was added.
Changed in version 3.3: The handlers argument was added. Additional checks were added to catch situations where incompatible arguments are specified (e.g. handlers together with stream or filename, or stream together with filename).
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