python - 循环只运行一次

Question

我的代码有问题。该循环仅针对用户输入的数字运行一次。感谢您的帮助。

#create an empty list and ask the user how many items they want to add  
# take the items the user entered and add it to the empty list.
print("enter the number of items")
x = int(input(">")) #take number of user input with the type int
print("thanks")
print("enter your food items")
fitems = [] # empty list
for i in range(x): #range to limit the number of iteration the user entered.
    items = input (">") #taking the items from the user 
    empty = ""
    if (items == empty):# checking if the user added nothing
        print("no items added")
    break
else:
    fitems.append(items) #add the list of items the user entered to the 
empty list
    print("hello here is your food items: \n",fitems) #output user items

Answer 1

您的代码中缺少一些缩进，并且还有一些其他错误。这是(我认为)正确的代码:

print("enter the number of items")
x = int(input(">"))
print("thanks")
print("enter your food items")
fitems = []
for i in range(x):
    items = input(">").strip() # there was a space before first bracket in your code, it's possible to have it there, but this is better
    # edit: added .strip(), it removes extra whitespace from beginning and end
    if items == "": # no need to create empty string variable, compare simply with empty string,
    # edit: you can also use 'if not items:', because empty string evaluates to false
        print("no items added")
        break # break only if nothing added, so indent break to be only executed if empty
    fitems.append(items) # you don't have to have else here, break ends the loop, so this is not executed then
print("hello here are your food items: \n",fitems) # remove 1 indent, print only after loop ended