从列表列表中通过键获取值

Question

I am given a list of lists, similar to the following. I am very new to Python

[
{'id': 1244}, 
{'name': 'example.com'}, 
{'monitoring_enabled': 'Yes'}, 
{'monitoring_url': 'http://www.example.com/'}, 
{'monitoring_page_url': 'http://www.example.com/products-spool-chain-overview.htm'}, 
{'monitoring_text_string': 'quality product'}, 
]
[
{'id': 1245}, 
{'name': 'example.com'}, 
{'monitoring_enabled': 'Yes'}, 
{'monitoring_url': 'http://www.example.com/'}, 
{'monitoring_page_url': 'http://www.example.com/products-spool-chain-overview.htm'}, 
{'monitoring_text_string': 'quality product'}, 
]
[
{'id': 1246}, 
{'name': 'example.com'}, 
{'monitoring_enabled': 'Yes'}, 
{'monitoring_url': 'http://www.example.com/'}, 
{'monitoring_page_url': 'http://www.example.com/products-spool-chain-overview.htm'}, 
{'monitoring_text_string': 'quality product'}, 
]

How can I get the "name" value from this, without having to nest loops?

My current code is:

for _row in _rs:
    print(_row)
    print(_row["name])

However, I am receiving an error message: TypeError: list indices must be integers, not str

So, how can I accomplish this?

Answer 1

if it trully a list of list there is a comma between each list. then you can easily do that:

for i in x:
    print(i[1]['name'])

Answer 2

How does this look?

l = [{'id': 1244}, {'name': 'example.com'}, ...]
names = e['name'] for e in l if 'name' in e]

print(names)
>>> ['example.com']

Answer 3

You can move around the list and check if each dictionary has the "name" key, and print the result if yes.

list1 = [{'id': 1244}, 
         {'name': 'example.com'}, 
         {'monitoring_enabled': 'Yes'}, 
         {'monitoring_url': 'http://www.example.com/'}, 
         {'monitoring_page_url': 'http://www.example.com/products-spool-chain-overview.htm'}, 
         {'monitoring_text_string': 'quality product'}]

for dictionary in list1:
    if "name" in dictionary.keys(): # Whether the dictionary looks like {"name": ...}
        print(dictionary["name"])
        break # Exit the loop now that we have the name, instead of going through the whole list.

Edit: your input is broken. Before being able to work on it, you want to change the function that gives you what you showed in the OP into that:

[ # <-- outer list starts
 [
 {'id': 1244}, 
 {'name': 'example.com'}, 
 {'monitoring_enabled': 'Yes'}, 
 {'monitoring_url': 'http://www.example.com/'}, 
 {'monitoring_page_url': 'http://www.example.com/products-spool-chain- overview.htm'}, 
 {'monitoring_text_string': 'quality product'}, 
 ], # <--
 [
  {'id': 1245}, 
  {'name': 'example.com'}, 
  {'monitoring_enabled': 'Yes'}, 
  {'monitoring_url': 'http://www.example.com/'}, 
  {'monitoring_page_url': 'http://www.example.com/products-spool-chain-overview.htm'}, 
  {'monitoring_text_string': 'quality product'}, 
 ], # <--
 [
  {'id': 1246}, 
  {'name': 'example.com'}, 
  {'monitoring_enabled': 'Yes'}, 
  {'monitoring_url': 'http://www.example.com/'}, 
  {'monitoring_page_url': 'http://www.example.com/products-spool-chain-overview.htm'}, 
  {'monitoring_text_string': 'quality product'}, 
 ]
] # <-- outer list ends

Even better:

lists_of_dicts = [
                  [{'id': 1244, 
                    'name': 'example.com', 
                    'monitoring_enabled': 'Yes', 
                    'monitoring_url': 'http://www.example.com/', 
                    'monitoring_page_url': 'http://www.example.com/products-spool-chain- overview.htm', 
                    'monitoring_text_string': 'quality product'}],

                  [{'id': 1245, 
                    'name': 'example.com', 
                    'monitoring_enabled': 'Yes', 
                    'monitoring_url': 'http://www.example.com/', 
                    'monitoring_page_url': 'http://www.example.com/products-spool-chain- overview.htm', 
                    'monitoring_text_string': 'quality product'}],

                  [{'id': 1246, 
                    'name': 'example.com', 
                    'monitoring_enabled': 'Yes', 
                    'monitoring_url': 'http://www.example.com/', 
                    'monitoring_page_url': 'http://www.example.com/products-spool-chain- overview.htm', 
                    'monitoring_text_string': 'quality product'}]
                 ]