Use of pprint.pformat

[Truman]

import pprint
cats = [{'name': 'Zophie', 'desc': 'chubby'}, {'name': 'Pooka', 'desc': 'fluffy'}]
print(pprint.pformat(cats))
fileObj = open('C:\\Python36\\kodovi\\myCats.py', 'w')
with open('myCats.py') as f:
	f.write('cats = ' + pprint.pformat(cats) + '\n')
with open('myCats.py') as f:
	print(f.read())

Error:
Traceback (most recent call last):
  File "C:\Python36\kodovi\pretty.py", line 6, in <module>
    f.write('cats = ' + pprint.pformat(cats) + '\n')
io.UnsupportedOperation: not writable

example is from the same book ( Automate...), not sure why isn't it writible.

[Larz60+]

with open('myCats.py', 'w') as f:

[snippsat]

You don't use fileObj,it's not needed either.

import pprint

cats = [{'name': 'Zophie', 'desc': 'chubby'}, {'name': 'Pooka', 'desc': 'fluffy'}]
with open('cats.txt', 'w') as f:
    f.write('cats = ' + pprint.pformat(cats) + '\n')
with open('cats.txt') as f:
    print(f.read())

If you to use a path with open(r'C:\Python36\kodovi\'cats.txt', 'w') as f:
The modern way,as mention before so do not @Al Sweigart care about new stuff in Python,
like string formatting he use + everywhere and stuff like pprint.pformat() to build a string.

cats = [{'name': 'Zophie', 'desc': 'chubby'}, {'name': 'Pooka', 'desc': 'fluffy'}]
with open('cats.txt', 'w') as f:
    f.write(f'cats = {cats}\n')
with open('cats.txt') as f:
    print(f.read())