How are software libraries useful ? Name some software libraries of Python.

Software libraries provide pre-written and tested code for a specific set of functions or features that can be included in a software program, saving programmers time and effort. By utilizing existing libraries, programmers can avoid having to write complex code from scratch and can benefit from the experience and knowledge of other developers who have contributed to the library. This results in more efficient coding, faster development, and more reliable software.

Some software libraries of Python are as follows:

1. NumPy (Numerical Python)
2. SciPy (Scientific Python)
3. Panda Library