Question

我试图找出如何在迭代过程中将值替换为列表。需要这个的原因是这是测试代码，最终将有最多15/20 API调用来构建数千个table_2_details条目。

代码：

table1 = ['table_1', 'getpost', 'url_1_<project_id>', 'filename_1']
table2 = ['table_2', 'getpost', 'url_2_<project_id>', 'filename_2']

api_calls = [table1, table2]

# Special treatment
table2_details = ['table_2_details', 'getpost', 'url_2_details_<project_id>_<checklist_id>', 'filename_2_details']

projects = ['proj1', 'proj2', 'proj3']
checklists = ['check1', 'check2', 'check3']

for project_id in projects:
    print(f"\n{project_id}")
    for call in api_calls:
        print(call[2])
        if call[0] == "table_2":
            for checklist_id in checklists:
                print(table2_details[2])

当前输出：

proj1
url_1_<project_id>
url_2_<project_id>
url_2_details_<project_id>_<checklist_id>
url_2_details_<project_id>_<checklist_id>
url_2_details_<project_id>_<checklist_id>

proj2
url_1_<project_id>
url_2_<project_id>
url_2_details_<project_id>_<checklist_id>
url_2_details_<project_id>_<checklist_id>
url_2_details_<project_id>_<checklist_id>

proj3
url_1_<project_id>
url_2_<project_id>
url_2_details_<project_id>_<checklist_id>
url_2_details_<project_id>_<checklist_id>
url_2_details_<project_id>_<checklist_id>

我需要在＆lt;＆gt;

中显示的project_id和checklist_id中替换

我是Python的新手，所以如果这是疯了，请指出我正确的方向，以便我可以学习。

感谢您的帮助，

Answer 1

您可以使用字符串格式来执行此操作，例如将格式化序列放在字符串中，如下所示：

table2_details = ['table_2_details', 'getpost', 'url_2_details_{project_id:}_{checklist_id:}', 'filename_2_details']

然后在使用任何字符串之前，按照以下格式运行它们：

for arg in table2_details:
    print(arg.format(project_id='foo', checklist_id='bar'))

Answer 2

您可以使用

等列表中的数据动态构建url

table2_details = ['table_2_details', 'getpost', 'url_2_details', 'filename_2_details']
...

for checklist_id in checklists:
  url = table2_details[2] + "_" + project_id + "_" + checklist_id
  print(url)
  # do something with this url

Answer 3

使用格式打印。

table1 = ['table_1', 'getpost', 'url_1_{0}', 'filename_1']
table2 = ['table_2', 'getpost', 'url_2_{0}', 'filename_2']

api_calls = [table1, table2]

# Special treatment
table2_details = ['table_2_details', 'getpost', 'url_2_details_{0}_{1}', 'filename_2_details']

projects = ['proj1', 'proj2', 'proj3']
checklists = ['check1', 'check2', 'check3']

for project_id in projects:
    print "{}".format(project_id)
    for call in api_calls:
        print(call[2].format(project_id))
        if call[0] == "table_2":
            for checklist_id in checklists:
                print(table2_details[2].format(project_id, checklist_id))

Python在for循环中使用列表中的变量

3 个答案: