Python lets programmers redefine initializers at runtime. Don’t do that.
The C preprocessor lets programmers redefine “true”. Don’t do that.
Swift lets programmers use very foolish variable names. This may be the lesser sin, but still, don’t do that.
Given python has a reputation for relatively defect-free code, it’s remarkable how few guards it has for enforcing good code — no type safety, no access modifiers, only enforced indentation.