Python Code Error: I can't add more than one "product" to my app

Question

I have this supplyChain demo app, made it for learning. I have a problem in it though. I cannot add more than one "product", "chain", or "type/destination". What can I do to fix it?

Here it the code:

print("Welcome to supplyManage by PCMX ./Code\nType in .{help} to get started with commands")

initcmd = input("./: ")

if initcmd == ".{help}":
    print(
        "Welcome to supplyManage\n"
        "Start by creating chain: ./create{}\n"
        "Add product to chain by ./chain/pro\n"
        "Add chain type by: ./chain/type\n"
        "Add destination by: ./chain/desti\n"
        "Type ./chain/log for all lists printed\n"
        "As of now, only one chain can be made per program"
        "Now rerun program to load\n"
    )


if initcmd == "./create{}":
  ask = input("Name of Chain: ")
  chain = ask
  chainpro = [] # List of products 
  chaintype = [] # List of Types
  destichain = [] # final place of products
  print("Chain {} is made.".format(chain))
  initcmd = input("./: ")

if initcmd == "./{}/pro".format(chain):
  productname = input("Name of Product: ")
  chainpro.append(productname)
  initcmd = input("./: ")

if initcmd == "./{}/type".format(chain):
  typepro = input("Shipping Type: ")
  chaintype.append(chaintype)
  initcmd = input("./: ")

if initcmd == "./{}/desti".format(chain):
  prodesti = input("Final Place of Product: ")
  destichain.append(prodesti)
  initcmd = input("./: ")

if initcmd == "./{}/log".format(chain):
  asklogprint = input("We are going to export as a txt file. y or n")
  if asklogprint == "n":
    initcmd = input("./: ")
  elif asklogprint == 'y':
    import json
    with open("DataProducts.txt", 'w') as savepro:
      savepro.write(json.dumps(chainpro, chaintype, destichain))
    initcmd = input("./: ")
  else:
    print("Invalid Response")
    inicmd = input("./: ")

Answer 1

You are going to want to nest everything in a while loop and have that act as a switch to keep the program running, and use similar logic to allow for multiple inputs at once.

For multiple inputs:

x = 0
arr = []
while x != 'done':
    x = input('enter a number: \n')
    for i in x:
        if x != 'done':
            arr.append(x)

This code above allows consecutive inputs until the user types 'done', and appends values to an array. As rayryeng pointed out, you also want to nest everything a similar while loop in order to keep the program running.