Why fatal error: 'yaml.h' file not found when installing PyYAML?

Question

I\'m trying out downloading PyYAML and install it following the instructions here http://pyyaml.org/wiki/PyYAML

So I downloaded the ZIP package: http://pyyaml.org/downlo

Answer 1

In MacOS the following solved the problem:

pip3 uninstall PyYaml
pip3 install PyYaml==5.2