如何将此列表理解转换为 for 循环，但我不能 [重复]

Posted 2023-02-23

【中文标题】如何将此列表理解转换为 for 循环，但我不能 [重复]

【英文标题】：How can I convert This List comprehension to for loop but I can't [duplicate]

【发布时间】：2021-11-13 16:00:22

【问题描述】：

def keys(dic):
    return [key for key in dic]


print(keys(dic))

我想将列表理解替换为 for 循环

【参考方案1】：

def f(dic):
    new_keys = []
    for i in dic:
        new_keys.append(i)

    return new_keys

def g(dic):
    return list(dic)

def h(dic):
    return [*dic]

dic = 'a': 1, 'b': 2
print(f(dic))
print(g(dic))
print(h(dic))

f 做你想做的事，但我不会使用 f。我会选择g，也许看看h。 h 适用于 python >= 3.5。点击此处了解更多详情：How to return dictionary keys as a list in Python?

检查输出

['a', 'b']
['a', 'b']
['a', 'b']

【讨论】：

谢谢你真的帮助我

helloffffffffff

def items(dic): # li = [] # for item in dic: # it = (item, dic[item]) # li.append(it) # return li

def items(dic): # li = [] # for item in dic: # it = (item, dic[item]) # li.append(it) # return li

def items(dic): # li = [] # for item in dic: # it = (item, dic[item]) # li.append(it) # return li

【参考方案2】：

这是您需要的吗？

def keys(dic):
    key_list = []

    for key in dic.keys():
        list.append(key)
        print(key)

    return key_list

【讨论】：

谢谢你真的帮助我

def items(dic): # li = [] # for item in dic: # it = (item, dic[item]) # li.append(it) # return li