PEP8 rules for Imports

Some recommended PEP8 style guidelines for imports:

1. Imports should be on separate lines:

   from math import sqrt, ceil      # Not recommended
   from math import sqrt            # Recommended
   from math import ceil
2. Order imports as follows at the top of the module:

   > - Standard library imports 
   > - Related third party imports 
   > - Local application/library specific imports
3. Wildcard imports should be avoided as it leads to confusion in names in the current namespace. If you do from module import *, it can be unclear if a specific name in your code comes from module or not. This is doubly true if you have multiple from module import *-type statements.
4. Avoid using relative imports; use explicit imports instead.