Google API 使用过滤器获取快照，

Question

我写了下面的代码，其中 return 我的快照列表，它有特定的字符串，但这不是 return 大小为 0 的快照，

https://cloud.google.com/compute/docs/reference/rest/v1/snapshots/list

this  API have following attributes:

project_id
过滤器

I am trying to put some filter based on regular expression which will match all snapshot which have "intance-snap" in there name.

 def snapshotlist():  
        query = "name eq <string>.*"  
        snaplist = compute.snapshots().list(project=project,filter=query).execute()  
        snaplist = ast.literal_eval(json.dumps(snaplist))  
        for snap in snaplist['items']:  
            print(snap['name'])

以上代码没有 return 大小为 0 的快照，有没有办法获取所有快照，而不考虑 SIZE？

Answer 1

来自 Snapshot documentation，对于可选参数的 filter 属性：

The expression must specify the field name, a comparison operator, and the value that you want to use for filtering. The value must be a string, a number, or a boolean. The comparison operator must be either =, !=, >, or <.

虽然这意味着您无法执行与驱动器 API 类似的查询，例如q: "name contains 'some string'"，Snapshots#list方法似乎仍然支持通配符匹配。如果您无法成功编写适当的正则表达式，那么解决方案是收集您的整个列表 Snapshot，然后使用您的语言的字符串和正则表达式方法来过滤输出。

def get_matching_snapshots(projectId: str, query='',
                           fields='id,nextPageToken,warning,items(id,name,description)'):
    snaplist = []
    params = {project: projectId,
              filter: query,
              fields: fields}
    # Collect all pages of results
    request = compute.snapshots().list(**params)
    while request:
        response = request.execute()
        if 'items' in response:
            snaplist.extend(response['items'])
        if 'warning' in response:
            pprint(response['warning'])
        request = compute.snapshots().list_next(request, response)

    return snaplist

# Use 'filter' parameter to restrict on server side:
name_fragment = "some required part of the name"
q = f'name = "{name_fragment}.*"'
pprint(get_matching_snapshots("some project id", q))

# get all, then apply restrictions after retrieval:
all_snapshots = get_matching_snapshots("some project id")
matches = []
rgx = re.compile('some regex')
for snap in all_snapshots:
    # use rgx.match with the relevant snap property
    ...

您可能会发现查阅计算 API 的 Python 文档或使用 Python 客户端的 API Explorer:

会有所帮助

Google API 使用过滤器获取快照，

Google API to get Snapshot using filter,

python

snapshot

google-api-client

google-cloud-platform