Question

In Python

How would I add a menu option to save the inventory to a file and another menu option to load inventory from the file. You should ask the user what file to save to and what file to retrieve from. The idea is that every evening at closing the inventory would be "dumped" from the lists or dictionaries you created into the file and it can be reloaded in the morning. In this way the information is not lost every time the program is terminated.

Answer 1

I've used JSON to save the dictionary and retrieve them from file

Code with comments

import json
# save file function
def saveToFile(name,inventory):
#open json file and dump the dictionary, indent=4 to make it pretty
with open(name+".json", 'w') as fp:
json.dump(inventory, fp,indent=4)
#load data from json
def LoadFromFile(name):
#open json file and load data
with open(name+'.json', 'r') as fp:
return json.load(fp)
  
#sample inventory for testing
inventory1 = {'Name' : 'x', 2 : [1,2,3,4], 'Code' : ['Python','C++']}
#menu
print("1. Save Inventory to a file ")
print("2. Load Inventory from a file ")
choice=input("Enter choice..");
if choice=="1":#save
name=input("Enter file name ")
saveToFile(name,inventory1)
print("Inventory save to "+name)

if choice=="2":#load
name=input("Enter file name ")
inven=LoadFromFile(name)
print("Inventory Loaded from "+name)
print(inven)#print

Output

####################################################################

#############################################################################

For indentation purpose