β‘
- 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
This chapter is from the book
This chapter is from the book
This chapter is from the book
This chapter is from the book
2.3 Comments
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 βdoc stringsβ for short. You can add a βcommentβ 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.