- 2.1 Program Output, the print Statement, and Hello World!
- 2.2 Program Input and the raw_input()Built-in Function
- 2.3 Comments
- 2.4 Operators
- 2.5 Variables and Assignment
- 2.6 Numbers
- 2.7 Strings
- 2.8 Lists and Tuples
- 2.9 Dictionaries
- 2.10 Code Blocks Use Indentation
- 2.11 if Statement
- 2.12 while Loop
- 2.13 for Loop and the range() Built-in Function
- 2.14 List Comprehensions
- 2.15 Files and the open() and file() Built-in Functions
- 2.16 Errors and Exceptions
- 2.17 Functions
- 2.18 Classes
- 2.19 Modules
- 2.20 Useful Functions
- 2.21 Exercises
As with most scripting and Unix-shell languages, the hash or pound ( # ) sign signals that a comment begins from the # and continues until the end of the line.
>>> # one comment ... print 'Hello World!' # another comment Hello World!
There are special comments called documentation strings, or “doc strings” for short. You can add a “comment” at the beginning of a module, class, or function string that serves as a doc string, a feature familiar to Java programmers:
def foo(): "This is a doc string." return True
Unlike regular comments, however, doc strings can be accessed at runtime and be used to automatically generate documentation.