Question

Modify your program from Learning Journal Unit 7 to read dictionary items from
a file and write the inverted dictionary to a file. You will need to decide on
the following:

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

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The Unit 7 program:

Dr_Appointments = {'Mom':[2, 'April', 2020], 'Brother':[6, 'July', 2020], 'Sister':[6, 'January', 2021], }

def invert_dict(d):
inverse = dict()
for key in d:
    val = d[key]
    for val in val:
      if val not in inverse:
        inverse[val] = [key]
      else:
        inverse[val].append(key)
return inverse

print('Dr. Appointments:', Dr_Appointments)

print('Inverted Dr. Appointments:')
Invert_Appointments = invert_dict(Dr_Appointments)
print(Invert_Appointments)

This is the expanded dictionary: the Unit 7 plus three more:

Mom: 2, April, 2020,
Brother: 6, July, 2020,
Sister: 6, January, 2021,
Aunt: 2, December, 2021,
Uncle: 6, November, 2021,
Niece: 2, December, 2020

Answer 1

ANSWER:

I have provided the properly commented and indented code so you can easily copy the code as well as check for correct indentation.
I have provided the output image of the code so you can easily cross-check for the correct output of the code.
Have a nice and healthy day!!

CODE

# inverting dict
def invert_dict(d):
    # defining empty dict
    inverse = dict()
    # looping through each key value of dict
    for key in d:
        val = d[key]
        # converting val list to tuple to use it as key
        val = tuple(val)
        if val not in inverse:
            inverse[val] = [key]
        else:
            inverse[val].append(key)
        
    # returning inverse 
    return inverse


# first reading file and storing content in as dictonary in variable
# opening file
file = open("f1.txt",'r')

# now reading content of file
content = file.read()

# loading content in dictonary format using eval funtion of python
data = eval(content)

# inverting data
inv_data = invert_dict(data)

# converting inv_data to string
string_inv = str(inv_data)

# storing string_inv to file
file_write = open("f2.txt",'w')

# writing to file_write
file_write.write(string_inv)

# file object to close
file_write.close()

INPUT IMAGE (f1.txt)

OUTPUT IMAGE

f2.txt