for循环是否在Python中清空列表？

Posted 2021-04-08

如何在第二和第三部分中获取列表中的项目作为输出？ （每次我要打印它们时，它们只是从列表中的项目中打印字母。）

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

答案

您在每次迭代中都覆盖foods。请尝试以下方法：

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