As we know Matplotlib is a which package in which Pyplot is a module and Pylab is installed alongside Matplotlib. It is a procedural interface to the Matplotlib Object-oriented programming language.

It provides a Matlab like namespace by importing functions from the modules Numpy and Matplotlib. Matplotlib is used for plotting and Numpy is used for mathematical and working with arrays.

Pylab interface is more convenient for interactive calculations and plotting, as it minimizes typing.

## Example

```
import pylab
import numpy as np
a=np.linspace(0, 20, 100)
b=np.cos(a)
pylab.plot(a,b)
pylab.show()
```

**Output**

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