Write a function in Python to update the file with a new value of stock. The stock and the product_code

Q. Following is the structure of each record in a data file named "PRODUCT.DAT".

 

("prod_code": value, "prod_desc": value, "stock": value)

 

The values for prod_code and prod_desc are strings and the value for stock is an integer.

 

Write a function in Python to update the file with a new value of stock. The stock and the product_code, whose stock is to be updated, are to be inputted during the execution of the function.

Answer =

 

import pickle
f = open("pathwala.txt","rb")
datalst = [ ]
while True :
    try :
        data = pickle.load(f)
        datalst += [data]
    except EOFError :
        break

f.close()

f = open("pathwala.txt","wb")
stock = int(input("Enter Stock which is to update :-"))
for i in datalst :
    if stock == i["stock"] :
        prod_code = input("Enter prod_code :- ")
        prod_desc = input("Enter prod_desc :- ")
        i["prod_code"] = prod_code
        i [ "prod_desc" ] = prod_desc
        pickle.dump(datalst,f)


f.close()