Easypost Python examples still using version 7

[Gene Wood]

It looks like the examples for Python no longer work because they're using the old Version 7 syntax

Example : https://github.com/EasyPost/examples/blob/036f84ca892e1ca29bb56edc4574fa0e3095a4b4/official/guides/getting-started/python/create_from_address.py

[Justin Hammond]

Hey @gene1wood, thanks for reporting this! We've ensured the docs snippets are up-to-date but it appears we missed a few of the guide snippets. We'll comb through them and get fixes up shortly.