Numpy, scipy, matplotlib, and pylab are common terms among they who use python for scientific computation.

I just learn a bit about pylab, and I got confused. Whenever I want to import numpy, I can always do:

```
import numpy as np
```

I just consider, that once I do

```
from pylab import *
```

the numpy will be imported as well (with `np`

alias). So basically the second one does more things compared to the first one.

There are few things I want to ask:

- Is it right that pylab is just a wrapper for numpy, scipy and matplotlib?
- As np is the numpy alias in pylab, what is the scipy and matplotlib alias in pylab? (as far as I know, plt is alias of matplotlib.pyplot, but I don't know the alias for the matplotlib itself)

`/usr/lib/pymodules/python2.7/matplotlib/pylab.py`

(the exact path is a little different for Windows or OSX; ask if you need help finding it.)1more comment