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 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.

My Learning Journal Unit 7:

fav_artist = {
    # artist name : [music genre, age, net-worth]
    "Jay Z": ["rapper", 50, "$ 1 billion"],
    "Beyoncé": ["singer", 38, "$ 470 million"],
    "Nicki Minaj": ["rapper", 37, "$ 85 million"],
    "Drake": ["rapper", 33, "$150 million"],
    "Kanye West": ["rapper", 42, "$1.3 billion"],
    "Usher": ["singer", 41, "$180 million"],
}


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


inverted_artist = invert_dict(fav_artist)
print("original dictionary:")
print(fav_artist)
print("inverted dictionary:")
print(inverted_artist)

output:

C:\Users\Goddess\PycharmProjects\UoPeople\venv\Scripts\python.exe C:/Users/Goddess/PycharmProjects/UoPeople/School.py
original dictionary:
{'Jay Z': ['rapper', 50, '$ 1 billion'], 'Beyoncé': ['singer', 38, '$ 470 million'], 'Nicki Minaj': ['rapper', 37, '$ 85 million'], 'Drake': ['rapper', 33, '$150 million'], 'Kanye West': ['rapper', 42, '$1.3 billion'], 'Usher': ['singer', 41, '$180 million']}
inverted dictionary:
{'rapper': ['Jay Z', 'Nicki Minaj', 'Drake', 'Kanye West'], 50: ['Jay Z'], '$ 1 billion': ['Jay Z'], 'singer': ['Beyoncé', 'Usher'], 38: ['Beyoncé'], '$ 470 million': ['Beyoncé'], 37: ['Nicki Minaj'], '$ 85 million': ['Nicki Minaj'], 33: ['Drake'], '$150 million': ['Drake'], 42: ['Kanye West'], '$1.3 billion': ['Kanye West'], 41: ['Usher'], '$180 million': ['Usher']}

Process finished with exit code 0

Answer 1

/copyable code

def invert_Dictionary(x):

    inverse=dict()

    for key1 in x.keys():

        list_items = x.get(key1)

        inverse[list_items]=key1

    return inverse

def readfile(file_name):

    x=dict()

    with open(file_name,'r') as infile:

        for line1 in infile.readlines():

            line1=line1.strip().split(':')

            x[line1[0]]=line1[1]

    print('file Read',x)

    return x

def writefile(invert_d,file_name):

    with open(file_name,'w+') as wtfile:

        for key1,value1 in invert_d.items():

            wtfile.write(str(key1)+':'+str(value1)+'\n')

def main():

    x = readfile('dic.txt')

    invt_d = invert_Dictionary(x)

    print('Dictionary inverted',invt_d)

    writefile(invt_d,'inverted_dic.txt')

main()

Screenshot:

def invert_Dictionary (x): inverse=dict() for keyi in x.keys (): list_items = x.get (key1) inverse[list_items] =key1 return inverse def readfile(file_name) : x=dict() with open (file_name, 'r') as infile: for linei in infile.readlines(): line1=line1.strip ().split(':') x[line1[0])=line1[1] print('file Read',x) return X def writefile(invert_d, file_name): with open (file_name, 'w+') as wtfile: for keyi, value1 in invert_d.items(): wtfile.write(str (key1)+':'+str (value1)+'\n') def main(): x = readfile('dic.txt') invt_d = invert_Dictionary (x) print('Dictionary inverted', invt_d) writefile (invt_d, 'inverted_dic.txt') main()

Output:

dic - Notepad File Edit Format View Help Animals': ['Dog'], Birds': [ 'Peacock'? 'Reptile ['Turtle'i

('file Read', {"'Reptile'": " ['Turtle']", "Birds": " ['Peacock'],", "'Animals " ['Dog'],"}) ('Dictionary inverted', {" ['Peacock'],": "Birds'", " ['Turtle']": "Reptile'", ['Dog'],": "'Animals'"}) TI >>>

invert_dict - Notepad File Edit Format View Help ['Peacock'],:'Birds': I'Turtle']: Reptile': ['Dog'], : 'Animals':

Note:

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