Mastering Python Design Patterns - Second Edition

A second example, using a third-party module

There is actually a library, called retrying, that can be used for adding retry behavior to parts of an application. Let's use it for a similar implementation as the one in the first example.

First, make sure you install retrying using the pip install retrying command.

We need to start our code with the following imports:

import timeimport sysimport osfrom retrying import retry

We reuse the same function for creating a file. You could actually externalize it to a common functions module from where you would import it, if you want. For clarity, let's repeat it here:

def create_file(filename, after_delay=5):    time.sleep(after_delay)    with open(filename, 'w') as f:        f.write('A file creation test')