Is there an equivalent of
No. You'll need to use
R is for language for statistics, so many of the basic functionality you need, like
lm(), are loaded when you boot it up. Python has many uses, so you need to install and import the appropriate statistical packages.
numpy isn't a statistics package - it's for numerical computation more generally, so you need to use packages like
statsmodels to allow Python to do what R can do out of the box.