yaml.load() deprecation warning after updating to pyyaml v5.1 (released 13/03/19)

[olly-writes-code]

Very small issue. Wanted to flag early. Just updated to the lastest version of pyyaml (a dependency of dask) v5.1. After updating I get the following deprecation warning.

/dask/config.py:168: YAMLLoadWarning: calling yaml.load() without Loader=... is deprecated, as the default Loader is unsafe. Please read https://msg.pyyaml.org/load for full details.
  data = yaml.load(f.read()) or {}

[TomAugspurger]

Yep, there's a distributed issue as well. A PR updating to the safe method loader would be welcome.

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On Thu, Mar 14, 2019 at 12:19 PM kindjacket ***@***.***> wrote: Very small issue. Wanted to flag early. Just updated to the lastest version of pyyaml (a dependency of dask) v5.1. After updating I get the following deprecation warning. data = yaml.load(f.read()) or {}``` — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#4597>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABQHIsfX5-EiLYHSwv1DJYZCpo2OoBq0ks5vWoSogaJpZM4b0yvI> .

[jakirkham]

For context, this changed in PR ( yaml/pyyaml#257 ).

Note: While that PR appears closed, it was merged into specific commits noted at the bottom of the PR.