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pythonloggingstructlog
RSY
RSY

Reputation: 51

Is there a way in Python structlog to change the key from 'logger' to ''namespace"?

I am using structlog - http://www.structlog.org/en/stable/ in my Python Project. I have one if the processors in the configuration to be 

stdlib.add_logger_name

This adds the key in the event_dict to be logger. But, I want to change the key string to something else like namespace rather than logger. How can I do that?

I have checked the function for 

stdlib.add_logger_name(logger, method_name, event_dict)

but that function uses hardcoded string logger as 

event_dict["logger"] = logger.name

Upvotes: 1

Views: 1379

Answers (2)

RSY
RSY

Reputation: 51

Thanks to hynek's answer. I solved this by adding a local function:

def add_logger_name(logger, method_name, event_dict):
    """
    Add the logger name to the event dict with namespace as the key as per logging convention
    """
    record = event_dict.get("_record")
    if record is None:
        event_dict["namespace"] = logger.name
    else:
        event_dict["namespace"] = record.name
    return event_dict

Setting this in the 

processors=[add_logger_name,...]

Upvotes: 1

hynek
hynek

Reputation: 4126

Currently, structlog.stdlib.add_logger_name() is 6 LoC, of which you most likely only need two:

def add_logger_name(logger, method_name, event_dict):
    """
    Add the logger name to the event dict.
    """
    record = event_dict.get("_record")
    if record is None:
        event_dict["logger"] = logger.name
    else:
        event_dict["logger"] = record.name
    return event_dict

Just copy and paste it and adapt it to your needs.

It wouldn't be worth it to add options to the processor and slow it down for everybody since it didn't come up until today, but structlog has been engineered purposefully to make such customizations easy.

Upvotes: 1

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