4.34 Ã10-55 is a proper example because. 1  4.34, which is a in this example, is not smaller than 1 and not larger than 10. 2  10's exponent is the integer -55. Integers can be negative.
The most reliable way to install a Python package is to install it from source via its setup.py script. This will install your Python package into a directory like /Library/Python/2.6/site-packages. The simplest method is using easy_install, a gem or apt-like interface for installing Python packages.
If you chose to use the 2.7.3 version of Python, you will need to follow these steps. Once you have successfully installed Python, it is time to add it to the System Path Variable. Doing this will allow Python to run scripts on your computer without any conflicts of problems.