Python 3: An interactive deep dive/

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Saving Data to a Pickle File

Saving Data to a Pickle File

We'll cover the following...

The pickle module works with data structures. Let’s build one.

Python 3.5
shell = 1
print (shell)                                                                                      #①
#1
entry = {}                                                                                         #②
entry['title'] = 'Dive into history, 2009 edition'
entry['article_link'] = 'http://diveintomark.org/archives/2009/03/27/dive-into-history-2009-edition'
entry['comments_link'] = None
entry['internal_id'] = b'\xDE\xD5\xB4\xF8'
entry['tags'] = ('diveintopython', 'docbook', 'html')
entry['published'] = True
import time
entry['published_date'] = time.strptime('Fri Mar 27 22:20:42 2009')                                #③
print (entry['published_date'])
#time.struct_time(tm_year=2009, tm_mon=3, tm_mday=27, tm_hour=22, tm_min=20, tm_sec=42, tm_wday=4, tm_yday=86, tm_isdst=-1)

① Follow along in Python Shell #1.

② The idea here is to build a Python dictionary that could represent something useful, like an entry in an Atom feed. But I also want to ensure that it contains several different types of data, to show off the pickle module. Don’t read too much into these values.

③ The time module contains a data structure (struct_time) to represent a point in time (accurate to one millisecond) and functions to manipulate time ...