Question

Hello,

Similar questions like this have been previously answered, but this question is different because it has only one part while similar questions have 2 parts and their solutions is a combination of the 2 parts. I have not been able to find an absolute solution for this part.

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:(A screenshot of my learning Journal Unit 7 is attached below)

• 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.
• 
  1 d-{ "Toochi': [.322-567-8883. ,'toochi@toochǐ.con","39"],"John": [.899-457-2343. ,' john@john . com .,. 35. ],"Clinton": ["764-998-9003. ,' clinton@clinton . con","26.)) def invert_dict (d): inverse- dict) for key in d: val - d[key] for itemin val: inverse[item]-key; return inverse 10 11- for key in d: 12 print (key,d[key), sep") 14 15 inverse invert_dict (d) 16 for key in inverse: 17 print (key,inverse[key], sep-" 18 19 # This dictionary contains vital records of 3 students Toochì, John, & Clinton. The records are their phone numbers, email addresses, and ages 20 # The inverted dictionary is not meaningful because it takes up lots of memory space, and the information displayed is not easily understood 322-567-8883 9-457-2343 oochi John inton: 764-998-9003'clintonaclinton.com' '26' tooch1Qtooch1.com [email protected]. 35 י 322-567-8883: Toochi toochiatoochi.com: Toochi 39Toochi 099-457-2343: John ohngjohn.com: John 5 John 764-998-9003: Clinton clintonaclinton.comClinton 6: Clinton
  

Answer 1

Thanks for the question.

Here is the completed code for this problem. Comments are included so that you understand whats going on. Let me know if you have any doubts or if you need anything to change.

Thank You !!

========================================================================================

# read a file containing a dictionary and returns a dictionary
def read_dictionary(filename):
    dictionary={}
    with open(filename,'r') as infile:
        for line in infile.readlines():
            line = line.strip().split(':')
            key = line[0].strip('\'')
            values = [item.strip('\'') for item in line[1].strip('[]').split(',')]
            dictionary[key]=values
    return dictionary

# inverts the dictionary and returns the reversed dictionary
def invert_dict(d):
    inverse={}
    for key, items in d.items():
        for item in items:
            inverse[item]=key
    return inverse

# takes in a dictionary and the filename and writes the dictionary to that file
def write_to_file(inverted_dictionary,filename):
    with open(filename,'w') as outfile:
        for key,value in inverted_dictionary.items():
            outfile.write('\'{0}\':[\'{1}\']\n'.format(key,value))
    print('{} updated successfully.'.format(filename))



def main():
    infile_name = 'dictionary.txt' # file that needs to be read from 
    d = read_dictionary(infile_name) # reads the file which returns a dictionary
    reversed_d = invert_dict(d) # reverses the dictionary and return the reversed dictionary
    print(reversed_d) # you can comment this line
    outfile_name='inverted_dict.txt' # file that needs to be updated with the reversed dictionary
    write_to_file(reversed_d,outfile_name) # writes dictionary to the file


main()

=====================================================================================

Input and output files

# read a file containing a dictionary and returns a dictionary def read dictionary(filename): dictionary- dictionary.bt-Notepa with open (filename, r as infile: for line in infile.readlines ): line1ine.strip).split(: File Edit FormatView Help Toochi'322-567-8883, '[email protected]', '39'] John': ['009-457-2343", '[email protected],35'] key = line [ 0 ] . strip ( ' \ ' ' ) values item.stripor item in line[.tip').splitl"Clinton 764-998-9003', [email protected], 26'] dictionary[keyl-values return dictionary 10 nverts the dictionary and returns the reversed dictionary 12 def invert_dict (d) inverse=() for key, items in d.items) 13 inverted_dict.tt -Notepad 14 File Edit Format View Help 322-567-8883":[ 'Toochi' for item in itens: [email protected] :'Toochi'] 39:'Toochi'] 009-457-2343:['John' [email protected]*:['John' 35:['John'] 764-998-9003:['Clinton'] [email protected] ['Clinton'] 26:'Clinton'] inverselitem]-key return inverse 18 19 # takes in a dictionary and the filename and vrites the dictio to that file def write_to file (inverted dictionary, filename): with open (filename, 'w as outfile: for key,value in inverted dictionary.items): outfile. write( '、' { 0 } \ ' : [V { 1}\" ] \n . . format (key, value 23 24 print ('updated successfully.".format (filename)) 28 def main ): 29 infile_namedictionary.txt file that needs to be read From d read dictionary (infile_nam reads the file which returns a dictionary reversed d = invert-dict (d) # reverses the dictionary and return the reversed dictionary print (reversed d) # you can comment this line 31 32 invert_dict0 E 6: TODO TernaPython Console