'This operation lists in-progress multipart uploads for the
specified vault. An in-progress multipart upload is a
multipart upload that has been initiated by an
InitiateMultipartUpload request, but has not yet been
completed or aborted. The list returned in the List Multipart
Upload response has no guaranteed order.
The List Multipart Uploads operation supports pagination. By
default, this operation returns up to 1,000 multipart uploads
in the response. You should always check the response for a
`marker` at which to continue the list; if there are no more
items the `marker` is `null`. To return a list of multipart
uploads that begins at a specific upload, set the `marker`
request parameter to the value you obtained from a previous
List Multipart Upload request. You can also limit the number
of uploads returned in the response by specifying the `limit`
parameter in the request.
Note the difference between this operation and listing parts
(ListParts). The List Multipart Uploads operation lists all
multipart uploads for a vault and does not require a multipart
upload ID. The List Parts operation requires a multipart
upload ID since parts are associated with a single upload.
An AWS account has full permission to perform all operations
(actions). However, AWS Identity and Access Management (IAM)
users don\'t have any permissions by default. You must grant
them explicit permission to perform specific actions. For more
information, see `Access Control Using AWS Identity and Access
Management (IAM)`_.
For conceptual information and the underlying REST API, go to
`Working with Archives in Amazon Glacier`_ and `List Multipart
Uploads `_ in the Amazon Glacier Developer Guide .
:type vault_name: string
:param vault_name: The name of the vault.
:type limit: string
:param limit: Specifies the maximum number of uploads returned in the
response body. If this value is not specified, the List Uploads
operation returns up to 1,000 uploads.
:type marker: string
:param marker: An opaque string used for pagination. This value
specifies the upload at which the listing of uploads should begin.
Get the marker value from a previous List Uploads response. You
need only include the marker if you are continuing the pagination
of results started in a previous List Uploads request.'

def list_multipart_uploads(self, vault_name, limit=None, marker=None):

    params = {}
    if limit:
        params['limit'] = limit
    if marker:
        params['marker'] = marker
    uri = ('vaults/%s/multipart-uploads' % vault_name)
    return self.make_request('GET', uri, params=params)
