# Tips¶

reload() reloads a previously imported module. This is useful if you have edited the module source file using an external editor and want to try out the new version without leaving the Python interpreter. The return value is the module object.

Note: The argument should be a module which has been successfully imported.

Usage:

For Python2.x

 1 reload(module) 

For above 2.x and <=Python3.3

 1 2 import imp imp.reload(module) 

For >=Python3.4

 1 2 import importlib importlib.reload(module) 

## 2. Negative numbers in list index¶

Negative numbers mean that you count from the right instead of the left. So, list[-1] refers to the last element, list[-2] is the second-last, and so on.