venture of iit bombay vjti alumni hellopythonpython identifiers python identifier is name used to identify variablefunctionclassmodule or other object an identifier starts with letter to or to or an underscore (_followed by zero or more lettersunderscores and digits ( to python does not allow punctuation characters such as @$and within identifiers python is case sensitive programming language thusmanpower and manpower are two different identifiers in python here are naming conventions for python identifiers class names start with an uppercase letter all other identifiers start with lowercase letter starting an identifier with single leading underscore indicates that the identifier is private starting an identifier with two leading underscores indicates strongly private identifier if the identifier also ends with two trailing underscoresthe identifier is language-defined special name