使用带有用户输入的 if 语句

Question

I am trying to create a simple product inventory using python but for some reason the if statement won't run and I don't know what's wrong. Below is the output and inputs of the code.

#Code

def inventory_products():
    choice = str(input("What do you want to do? \nEnter Add item, Quantity, Show Inventory:"))
    if choice == 'Add item':
        input("Enter name")
inventory_products()

#Output

What do you want to do? 
Enter Add item, Quantity, Show Inventory:Add item 

Process finished with exit code 0

Answer 1

Try this:

def inventory_products():
    choice = str(input("What do you want to do? \nEnter Add item, Quantity, Show Inventory:"))
    if choice.strip() == 'Add item': # change in code to remove extra spaces
        input("Enter name")
inventory_products()

Answer 2

If you want to know about comparing strings in python click here

but you can try this code:

def inventory_products():
    choice = str(input("What do you want to do? \nEnter Add item, Quantity, Show Inventory:")).lower()
    if choice.strip() == 'add item':
        input("Enter name: ")
    else:
        print("Invalid Choice!")

inventory_products()

So .lower() will convert any capital letter to small letters, so that errors can be reduced