Python in easy steps, 2nd Edition: Covers Python 3.7 by Mike McGrath

Author:Mike McGrath [McGrath, Mike]
Language: eng
Format: epub, pdf
ISBN: 9781840788365
Publisher: In Easy Steps Limited
Published: 2018-07-17T23:00:00+00:00

The argument to the sleep() method may be a floating point number to indicate a more precise sleep pause time.

Do not confuse the time.strftime() method used in this example with the datetime.strftime() method used in the previous example.

Matching patterns

The Python “re” module can be imported into a program to make use of Regular Expression patterns that describe a particular string of characters. Regular Expressions are useful for text validation and for search-and-replace operations within text by matching their specified pattern to a section of the text.

A Regular Expression pattern may consist entirely of “literal characters” describing a character string to match within some text. For example, the Regular Expression “wind” finds a match in “windows” – the pattern literally matches the string in the text. More typically, a Regular Expression pattern consists of a combination of literal characters and these “metacharacters”:

Metacharacter:

Matches:

Example:

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