Answer to Question #101042 in Python for Bella

Question

How to format each dictionary item as a text string in the input file.
How to covert each input string into a dictionary item.
How to format each item of your inverted dictionary as a text string in the output file.
Create an input file with your original three-or-more items and add at least three new items, for a
total of at least six items.
Include the following in your Learning Journal submission:
The input file for your original dictionary (with at least six items).
The Python program to read from a file, invert the dictionary, and write to a different file.
The output file for your inverted dictionary.
A description of how you chose to encode the original dictionary and the inverted dictionary in
text files

Answer 1

1. How to format each dictionary item as a text string in the input file.

price_dict = {

'Apple': 5,

'Potato': 15,

'Tomato': 20

}

with open('dict_string', 'a+') as f:

for key, value in price_dict.items():

f.write(f'{key}:{value}\n')

2. How to covert each input string into a dictionary item

def string_to_dict():

item = input('Enter item, split key and value by ":" ').split(':')

if len(item) != 2 or not item[0] or not item[1]:

print('Enter correct data')

return string_to_dict()

dict_from_string = {item[0]: item[1]}

print(dict_from_string)

string_to_dict()

3. How to format each item of your inverted dictionary as a text string in the output file

with open('dict_string') as f:

data = dict()

for i in f.readlines():

if i != '\n':

item = i.split(':')

data[item[0]] = item[1].strip()

print(data)

4. Create an input file with your original three-or-more items and add at least three new items, for a

total of at least six items.

with open('new_input_file', 'w') as f:

f.write('Audi:1000\n'

'BMW:500\n'

'Nissan:100\n')

with open('new_input_file', 'a+') as f:

f.write('Ford:250\n'

'Chevrolet:300\n'

'Lada:2\n')