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Given the following text description, write Python code to implement the functionality described below step by step
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Description:
 <a href="http
Step1:  If you look at the RTFD section on RasterModelGrid you'll notice that it contains the same information. 
Now try the LinearDiffuser.
Step2:  Note also that the ? works for attributes of classes (assuming they have some documentation).
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Python Code:
from landlab import RasterModelGrid
from landlab.components import LinearDiffuser
?RasterModelGrid
Explanation: <a href="http://landlab.github.io"><img style="float: left" src="../landlab_header.png"></a>
Where to find information about Landlab
The core Landlab development team and community members have worked to create documentation for Landlab. 
The purpose of this notebook is to point you to the resources avalible regarding Landlab. 
First, Landlab's documentation is hosted on a ReadTheDocs (RTFD) website. 
The Landlab Documentation
Within it, you will find information about installation, use, and development. Two parts of the documentation to highlight are:
a. The User Guide
b. The Reference Manual (API)
Second, much of the documentation is accesible to you from the command line (or the jupyter notebook cell) via the ? operator.
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?LinearDiffuser
Explanation: If you look at the RTFD section on RasterModelGrid you'll notice that it contains the same information. 
Now try the LinearDiffuser.
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grid = RasterModelGrid((10, 10), xy_spacing=(3, 4))
?grid.add_ones
Explanation: Note also that the ? works for attributes of classes (assuming they have some documentation).
End of explanation
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