x,y,z = symbols('x y z') This way, you define the variables that define the three space dimensions in Cartesian coordinates. If you want to have all four space-time coordinates defined in spherical ...

The python is a respected deity in these parts and there are shrines dedicated to the worship of Eke. It is completely forbidden to kill a python here, as it has grave consequences. 3 .

TOML lets you insert comments simply by prefixing them with a hash symbol, as you would in Python. Small wonder, then, that Python itself is gravitating toward TOML as a configuration standard.