[Python] How to write and save html file in python?

This is what I know about writing to an HTML file and saving it:

html_file = open("filename","w")
html_file.write()
html_file.close()


But how do I save to the file if I want to write a really long codes like this:

1 <table border=1>
2 <tr>
3 <th>Number</th>
4 <th>Square</th>
5 </tr>
6 <indent>
7 <% for i in range(10): %>
8 <tr>
9 <td><%= i %></td>
10 <td><%= i**2 %></td>
11 </tr>
12 </indent>
13 </table>

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