2.6QUOTATIONS AND COMMENTS IN PYTHON

Python allows single ('), double (") and triple ('" or ") quotes for string literals, provided that they match at the beginning and the end of the string. You can use triple quotes for strings that span multiple lines. The following examples are legal Python strings:

word = 'word'

line = "This is a sentence."

para = """This is a paragraph. This paragraph contains

more than one sentence."

A string literal begins with the letter “r” (for “raw”) and treats everything as a literal character and “escapes” the meaning of meta characters (which are discussed in more detail in Chapter 4), as shown here:

a1 = r'\n'

a2 = r'\r'
a3 = r'\t'
print'a1:',a1,'a2:',a2,'a3:',a3

The output of the preceding code block is here:

a1: \n a2: \r a3: \t

You can embed a single quote in a pair of double quotes...