Notes. 1  For many of the articles on the NIDA Web site, such as the ones found in the DrugFacts section, no author is necessary. You may leave this out of your citation as in the example below if no author is given. 2  The date of posting/revision can be found at the top and/or bottom of the page in the footer.
HKEY_CLASSES_ROOT. HKEY_CLASSES_ROOT or HKCR is an alias (i.e. a reference) to HKEY_LOCAL_MACHINE\Software\Classes. A separate root key is added mainly so software developers have direct access to this data without dipping in to HKLM. HKCR contains data related to applications, shortcuts, and file extension associations.
What is a PY file? Files that contain the .py file extension are used by the Python Software for its Python programming language. Python is an object-oriented programming language that is used for the development of a variety of different software applications. The PY file is a program file that contains script that has been written in the Python language. Python can be run on a variety of platforms including Windows, Mac, Unix and Linux as well as a variety of mobile operating systems.