Question

我是Python的新手，学习了For Loops并编写了以下代码：

cars = [1, 2, 3, 4]
trucks = ['red', 'blue', 'green', 'white']

for numbers in cars:
    print (f"I can count: {numbers}")

for colors in trucks:
    print(f"I can list colors: {colors}")

new_list = []

for numbers in range(0, 4):
    new_list.append(numbers)

for numbers in new_list:
    print(f"I can count more: {new_list}!")

我得到这个结果：

I can count: 1
I can count: 2
I can count: 3
I can count: 4
I can list colors: red
I can list colors: blue
I can list colors: green
I can list colors: white
I can count more: [0, 1, 2, 3]!
I can count more: [0, 1, 2, 3]!
I can count more: [0, 1, 2, 3]!
I can count more: [0, 1, 2, 3]!

对于“我可以计数更多”部分，如何获取它以数字顺序列出范围：

I can count more: 1! 
I can count more: 2!, etc.

而不是打印行中的整个范围？

Answer 1

# Login using OAuth2.
@csrf_protect
def login(request):
    next_page = request.path
    if next_page is None or next_page == '':
        next_page = request.POST.get('next', request.GET.get('next', ''))

    # Check if they are already logged in and redirect them to the original page if so.
    if hasattr(request, 'user') and request.user.is_authenticated:
        return HttpResponseRedirect(next_page)

    # Otherwise, send them to the OAuth2 page with the request url as the next parameter.
    else:
        return HttpResponseRedirect('/soc/login/google-oauth2?next=' + next_page + '&hd=mydomain.com')

应该是

print(f"I can count more: {new_list}!")

因为print(f"I can count more: {numbers}!")是整个列表，而new_list是您在numbers中定义的for变量

Answer 2

使用“数字”代替“ new_list”。并且不要在同一列表上一次又一次地迭代，因为new_list包含您在上一个循环中显示的相同项目。所以，您的代码应该是这样的，

for numbers in range(0, 4):
    print(f"I can count more: {numbers}!")

循环印刷的整个范围

2 个答案: