It's simple to define a custom logger to augment event data with the time, backtrace, values of global variables and other useful information as required. This is because such information can be expensive to extract and is also dynamically available to the current logger. Notice that some useful information such as the event time is not included by default. This can be used to group messages into categories more finely than the log level (for example, all deprecation warnings have group :depwarn), or into logical groupings across or within modules. A group for the event, which is set to the base name of the file by default, without extension.
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#How do i turn off key light logger code
This identifier is designed to be fairly stable even if the source code of the file changes, as long as the logging statement itself remains the same.
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For example, to attach the local array variable A and the sum of a vector v as the key s you can use A = ones(Int, 4, 4)Īll of the logging macros and share common features that are described in detail in the documentation for the more general macro Log event structureĮach event generates several pieces of data, some provided by the user and some automatically extracted. This allows you to capture local variables and other program state for later analysis. Second, the logging tools allow you to attach arbitrary data to each event as a set of key–value pairs. In this case sum(rand(100)) and the associated string processing will never be executed unless debug logging is enabled. Furthermore, it's very cheap to leave debug statements like this in the source code because the system avoids evaluating the message if it would later be ignored. For example, in contrast to the above "The sum of some values $(sum(rand(100)))" First, it allows you to control the visibility and presentation of messages without editing the source code. The system provides several advantages over peppering your source code with calls to println(). ┌ Warning: Abandon printf debugging, all ye who enter here! Events are created by inserting a logging statement into the source code, for example: "Abandon printf debugging, all ye who enter here!" The Logging module provides a way to record the history and progress of a computation as a log of events.
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