otp.Source.logf#

Source.logf(message, severity, *args, where=None, inplace=False)#

Call built-in OneTick LOGF function.

Parameters

  • message (str) – Log message/format string. The underlying formatting engine is the Boost Format Library: https://www.boost.org/doc/libs/1_53_0/libs/format/doc/format.html

  • severity (str) – Severity of message. Supported values: ERROR, WARNING and INFO.

  • where (Operation) – A condition that allows to filter ticks to call LOGF on. None for no filtering.

  • inplace (bool) – The flag controls whether operation should be applied inplace or not. If inplace=True, then it returns nothing. Otherwise method returns a new modified object.

  • args (list) – Parameters for format string (optional).

Return type

Source

Examples

>>> data = otp.Ticks(PRICE=[97, 99, 103])
>>> data = data.logf("PRICE (%1%) is higher than 100", "WARNING", data["PRICE"], where=(data["PRICE"] > 100))