[nephanth]

Python is absolutely not a "no-frills" language. It is loaded with features, I'd be willing to bet that 99% of python programmers don't know all language features (even relatively old and frequently used ones like metaclasses) and that virtually nobody knows the whole stdlib

[pjmlp]

Additionally if one cares about performance, knowing C or C++ is also a must.

[DeathArrow]

When was the last decade someone cared about performance?

[pjmlp]

Apparently everyone that writes native libraries to be called from Python, while calling them Python libraries.