Tracking of Sales over the year assignment
Write a python assignment program that allows the user to view and edit the sales amounts of the current year.
Sample Run:
Command Menu
view - View a sales amount for a specified month
highest - View the highest sales of the year
lowest - View the lowest sales of the year
edit - Edit a sales amount for a specified month
average - View the sales average for the whole year
range - View the sales average for a specified sales amount range
total - View the sales total for the whole year
exit - Exit the program
Command: new
Invalid command. Try again.
Command: view
Three-letter month: Jan
The sales amount for Jan is $14,317.00
Command: highest
The highest sales amount is $15,578.00 in Aug
Command: lowest
The lowest sales amount is $88.00 in Nov
Command: edit
Three-letter month: Jan
Sales amount: 15293
The sales amount of $15,293.00 for Jan has been updated
Command: average
The monthly average is $5,775.55
Command: range
Low: 2540
Hi: 8755
The sales average of this range is $4,791.33
Command: total
The yearly total is $63,531.00
Command: view
Three-letter month: July
Invalid three-letter month. Try again
Command: exit
Thank you for using my app!
________________________________
Specifications:
In your program, use monthly_sales.txt download for the month and the
monthly sales.
The program should read the file and store the sales data for each
month in a dictionary with the month abbreviation as the key for each
item.
If the sales data is edited, the program should write the updated data
to the text file.
The program should display error messages for invalid user inputs.
Use the format function to display your outputs when needed. For
instance, if the month is Jan and the amount is 14317, "Sales amount
for Jan is $14,317.00." is implemented as follows:
print("Sales amount for {:s} is ${:,.2f}.".format(month, amount))
{:s} is a string format parameter for the month.
{:,.2f} is a float number format parameter for the amount with 2 decimal places.
read_file()
write_file(dictionary)
view_sales_amount(dictionary)
get_highest_amount(dictionary)
get_lowest_amountt(dictionary)
edit_sales_amount(dictionary)
get_average(dictionary)
get_range_average(dictionary)
get_total(dictionary)
terminate_app()
Solution:
def read_file():
'''
Reading the database from the file monthly_sales.txt and mapping to dictionary
Return the dictionary
'''
dictionary = {}
with open('monthly_sales.txt') as f:
# Reading line
line = f.readline()
while line:
# Ignore the empty line
if line == "" or line == '\n':
continue
#print("DEBUG: {:s}".format(line))
# Add to the dictionary
dictionary[str(line.split("\t")[0])] = (float(line.split("\t")[1]))
# Go to read next line
line = f.readline()
return dictionary
def write_file(dictionary):
'''
Write current data to file monthly_sales.txt
'''
# Open for writing. Create a new file one
outfile = open('monthly_sales.txt', 'w')
for k in dictionary.keys():
# Write out data
outfile.write("{}\t{}\n".format(k, dictionary[k]))
def view_sales_amount(dictionary):
'''
View a sales amount for a specified month
'''
# Ask input month from console
month = str(input("Tree-letter month: "))
found = False
for k in dictionary.keys():
if k.lower() == month.lower():
# If found the data. Just print it
print("Sales amount for {:s} is ${:,.2f}.".format(k, dictionary[k]))
found = True
break
if found == False:
# Incase no found the month input. Just print the error
print("Invalid three-letter month. Try again")
def get_highest_amount(dictionary):
'''
Get the highest sales of the year
'''
highest = None
month = None
for k in dictionary.keys():
if highest == None or highest < dictionary[k]:
# If we found this have a new highest. Just update it
highest = dictionary[k]
month = k
# Print out the data
print("The highest sales amount is ${:,.2f} in {:s}.".format(highest, month))
def get_lowest_amount(dictionary):
'''
View the lowest sales of the year
'''
lowest = None
month = None
for k in dictionary.keys():
if lowest == None or lowest > dictionary[k]:
# Found new lowest. Update it
lowest = dictionary[k]
month = k
# Print out the data
print("The lowest sales amount is ${:,.2f} in {:s}.".format(lowest, month))
def edit_sales_amount(dictionary):
'''
Edit a sales amount for a specified month
'''
month = str(input("Tree-letter month: "))
found = False
for k in dictionary.keys():
if k.lower() == month.lower():
# If we found the month from the input. Just ask new value and update it
sales = float(input("Sales amount: "))
dictionary[k] = sales
print("Sales amount of ${:,.2f} for {:s} has been updated.".format(dictionary[k], k))
found = True
break
if found == False:
# Incase no found the month input. Just print the error
print("Invalid three-letter month. Try again")
def get_average(dictionary):
'''
'''
sumSales = 0.0
cnt = 0
for k in dictionary.keys():
sumSales += dictionary[k]
cnt += 1
print("Monthly average is ${:,.2f}".format(sumSales / cnt))
def get_range_average(dictionary):
'''
View the sales average for the whole year
'''
low = float(input("Low: "))
hi = float(input("Hi: "))
sumSales = 0.0
cnt = 0
for k in dictionary.keys():
if dictionary[k] >= low and dictionary[k] <= hi:
# If current value is mapping the HI and LOW value. Calculate it
sumSales += dictionary[k]
cnt += 1
print("Sales average of this range is ${:,.2f}".format(sumSales / cnt))
def get_total(dictionary):
'''
View the sales total for the whole year
'''
sumSales = 0.0
for k in dictionary.keys():
# Just Calculate the total value
sumSales += dictionary[k]
# Print out
print("Yearly total is ${:,.2f}.".format(sumSales))
def terminate_app():
'''
Exit the program
'''
print("Thank you for using my app!")
exit(0)
if __name__ == '__main__':
print("Product Sales Management System")
print("Command menu")
print("view - View a sales amount for a specified month")
print("highest - View the highest sales of the year")
print("lowest - View the lowest sales of the year")
print("edit - Edit a sales amount for a specified month")
print("average - View the sales average for the whole year")
print("range - View the sales average for a specified sales amount range")
print("total - View the sales total for the whole year")
print("exit - Exit the program")
dictionary = {}
dictionary = read_file()
# Loop until exit command is type
while True:
print("")
cmd = (str)(input("Command: "))
if cmd == "view":
view_sales_amount(dictionary)
elif cmd == "highest":
get_highest_amount(dictionary)
elif cmd == "lowest":
get_lowest_amount(dictionary)
elif cmd == "edit":
edit_sales_amount(dictionary)
elif cmd == "average":
get_average(dictionary)
elif cmd == "range":
get_range_average(dictionary)
elif cmd == "total":
get_total(dictionary)
elif cmd == "exit":
# before exit. Just update the database.
write_file(dictionary)
terminate_app()
else:
print("Invalid command. Try again")