5 An Informal Introduction to Python
In the following examples, input and output are distinguished by the
presence or absence of prompts (‘>
>> ’ and ‘... ’): to repeat
the example, you must type everything after the prompt, when the
prompt appears; lines that do not begin with a prompt are output from
the interpreter. Note that a secondary prompt on a line by itself in an example means
you must type a blank line; this is used to end a multi-line command.
Many of the examples in this manual, even those entered at the
interactive prompt, include comments. Comments in Python start with
the hash character, ‘#’, and extend to the end of the
physical line. A comment may appear at the start of a line or
following whitespace or code, but not within a string literal. A hash
character within a string literal is just a hash character.
# this is the first comment
SPAM = 1 # and this is the second comment
# ... and now a third!
STRING = "# This is not a comment."