for 循环是否会清空 Python 中的列表？答案

【问题标题】：Does a for loop empty a list in Python?for 循环是否会清空 Python 中的列表？
【发布时间】：2020-04-21 15:29:16
【问题描述】：

如何将列表中的项目作为第二和第三部分的输出？（每次我想打印它们时，它们只打印列表中某个项目的字母。）

foods = ["pizza", "burger", "popcorn", "cannoli", "noodles"]
print("The foods I like are:\n")
for foods in foods[:3]:
    print(foods.title())
#2nd
print("The foods my friend likes are:\n")
for foods in foods[1:4]:
    print(foods.title())
#3rd
print("The food SHE likes are:\n")
for foods in foods[:]:
    print(foods.title())

【问题讨论】：

当你为 foods in foods[:3] 做 for foods 时，你重新分配了 foods 的价值。试试这个方法。食物中的食物[:3]: print(food.title())

标签： python list for-loop

【解决方案1】：

您在每次迭代中覆盖foods。请试试这个：

foods = ["pizza", "burger", "popcorn", "cannoli", "noodles"]
#2nd
print("The foods my friend likes are:\n")
for f in foods[1:4]:
    print(f.title())
#3rd
print("The food SHE likes are:\n")
for f in foods[:]:
    print(f.title())

【讨论】：