如何使用我的 len() 僅在字典中打印我的項目一次而不打印數字 9、9 次

Question

如何使用 len() 僅在字典中打印一次我的項目，而不打印數字 9、9 次。 請幫助我，我無法解決這個問題。

這是我的代碼：

d = {
  "Brand: ": "Honda",
  "model: ": "Pilot",
  "year: ": 2021
}
for x in d:
  print(len(d))

ls = ["Chevrolet", "Dodge", "Ford", "Honda", "Jeep", "Nissan", "Saturn", "Subaru", "Tesla", "Toyota"]
for x in ls:
  print(len(ls))

ri = raw_input("Enter 'd', if you want to see a dictionary for a car. Or enter 'ls', if you want to see a list of cars: ")

def cars(d, ls):
  print ri
  if ri == 'd':
    print d
  if ri == 'ls':
    print ls

cars(d, ls)

Answer 1

for x in d: print(len(d))

您有一個 for 循環正在運行，它正在多次打印，將其切換為print(len(d))並修復它

Answer 2

您正在打印一個len ，這就是您所看到的，更改為您迭代的變量

d = {"Brand: ": "Honda", "model: ": "Pilot", "year: ": 2021}
for key, val in d.items():
    print(key, val)

ls = ["Chevrolet", "Dodge", "Ford", "Honda", "Jeep", "Nissan", "Saturn", "Subaru", "Tesla", "Toyota"]
for x in ls:
    print(x)

Answer 3

您的需求未明確。 這是我從您的需求中理解的實現。

d = {
  "Brand: ": "Honda",
  "model: ": "Pilot",
  "year: ": 2021
}

ls = ["Chevrolet", "Dodge", "Ford", "Honda", "Jeep", "Nissan", "Saturn", "Subaru", "Tesla", "Toyota"]

ri = raw_input("Enter 'd', if you want to see a dictionary for a car. Or enter 'ls', if you want to see a list of cars: ")

def cars(d, ls):
  print(ri)
  if ri == 'd':
    print(d)
  if ri == 'ls':
    print(len(ls))
    for l in ls:
        print(l)

cars(d, ls)