Question

"""
The following python program totals up a bill based on
how much was spent at each store.
"""


INPUT_FILE = 'bill.txt'


def main():


    # TODO



if __name__ == '__main__':
    main()

-------------------------------------------------------------------------------

(This needs to be in a text file)

9/2/19 [walMart] $12
9/21/19 [The Cheesecake Factory] $102
9/30/19 [Starbucks] $5
10/7/19 [WalMart] $17
10/22/19 [Starbucks] $8
10/28/19 [WalMart] $45

--------------------------------------------------------------------------

(This needs to be in a text file)

4/1/20 [Burger King] $9
4/6/20 [Pizza Hut] $82
4/12/20 [Burger King] $117
4/17/20 [McDonald's] $14
4/19/20 [Burger King] $65
4/19/20 [Joan's Fabric] $18
4/23/20 [Apple bee's] $12
4/25/20 [Pizza Hut] $29
4/29/20 [Burger King] $7

------------------------------------------------

(Output sample for bill 1)

  WalMart: $74
  The Cheesecake Factory: $102
  Starbucks: $13

Answer 1

I have included my code and screenshots in this answer. In case, there is any indentation issue due to editor, then please refer to code screenshots to avoid confusion.

------------------main.py-------------

INPUT_FILE = 'bill.txt' #input file for bill

def main():
   data = dict() #create a dictionary (Store, expense) mapping
   inpfile = open(INPUT_FILE, 'r')
   for line in inpfile: #read input file line by line
       line = line.strip("\n") #strip new line character from the end of line
       start = line.find("[") #find [ and ], since store name is present in between them
       end = line.find("]")
       store = line[start+1: end] #get store name
       start = line.find("$") #find $ since expense is after $
       expense = float(line[start+1:]) #read expense
       if store in data.keys(): #if store name already in dictionary, then add expensive to its previous value
           data[store] = data[store] + expense
       else: #if store name is not in dictionary, add store to dictionary with current expense
           data[store] = expense

   for store in data.keys(): #read each key value and print on ouput
       print(store + ": $" + str(data[store]))

if __name__ == '__main__':
   main()