When Python is launched, the first line will show our current version. Another way is to issue the following two lines of Python code after we launch Python:
>>>import sys >>>sys.version '3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)]' >>>
The first line of command imports a module called
sys
. A module is a collection of many Python programs serving a special purpose. Understanding a module is critical in learning Python. We will discuss this in more detail in Chapter 5, Introduction to Modules; Chapter 6, Introduction to NumPy and SciPy; Chapter 7, Visual Finance via Matplotlib; and Chapter 8, Statistical Analysis of Time Series.