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Raise the correct exception if the metrics are not observable #666

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merged 1 commit into from Jun 15, 2021
Merged

Raise the correct exception if the metrics are not observable #666

merged 1 commit into from Jun 15, 2021

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pietrodn
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Always check that a metric is observable before changing its value. Fixes #665.

tests/test_core.py Outdated Show resolved Hide resolved
Signed-off-by: Pietro De Nicolao <pd@bendingspoons.com>
@csmarchbanks
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Hello, thank you for your PR and issue! I am taking a few days of time off, but plan to review it next week.

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Thanks! Most of these would error already, but a message like ValueError: counter metric is missing label values is much nicer than AttributeError: 'Counter' object has no attribute '_value'.

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No error on missing labels for Gauge.set_function()
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