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In Python you don't even need a lib, dict is thread safe even in nogil. Is it? https://google.github.io/styleguide/pyguide.html#218-threading https://google.gi

• Spivak 2y ago
  Yep! Not every operation you can do on a dict is thread safe but if you find a situation where it isn't it's a bug. https://github.com/python/cpython/issues/112075 https://github.com/python/cpython/issues/112075 Google is recommending people not rely on it because it does make dict subclasses not substitutable. It's easy enough to avoid the issue completely so in most cases you might as well do that.