There is a command group 'az_storage_blob'. This group of commands could 'manage object storage for unstructured data  blobs'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_storage_blob_download batch'.The syntax is: az storage blob download-batch --destination
                               --source
                               [--account-key]
                               [--account-name]
                               [--auth-mode {key, login}]
                               [--connection-string]
                               [--dryrun]
                               [--max-connections]
                               [--no-progress]
                               [--pattern]
                               [--sas-token]
                               [--socket-timeout]. The 1th example of the child command would be to use it to 'download all blobs that end with  py', the syntax is: az storage blob download-batch -d . --pattern "*.py" -s mycontainer --account-name mystorageaccount --account-key 00000000. The 2th example of the child command would be to use it to 'download all blobs in a directory named  dir  from container named  mycontainer', the syntax is: az storage blob download-batch -d . -s mycontainer --pattern "dir/*". The 3th example of the child command would be to use it to 'download all blobs with the format  cli 2018 xx xx txt  or  cli 2019 xx xx txt  in container to current path', the syntax is: az storage blob download-batch -d . -s mycontainer --pattern "cli-201[89]-??-??.txt". The 4th example of the child command would be to use it to 'download all blobs with the format  cli 201x xx xx txt  except cli 2018 xx xx txt  and  cli 2019 xx xx txt  in container to current path', the syntax is: az storage blob download-batch -d . -s mycontainer --pattern "cli-201[!89]-??-??.txt". The parameter '--destination -d' is required. It is used to the existing destination folder for this download operation.. The parameter '--source -s' is required. It is used to the blob container from where the files will be downloaded.. The parameter '--account-key' is optional. storage account key. must be used in conjunction with storage account name. environment variable: azure_storage_key.. The parameter '--account-name' is optional. storage account name. related environment variable: azure_storage_account. must be used in conjunction with either storage account key or a sas token. if neither are present, the command will try to query the storage account key using the authenticated azure account. if a large number of storage commands are executed the api quota may be hit.. The parameter '--auth-mode' is optional. the mode in which to run the command. "login" mode will directly use your login credentials for the authentication. the legacy "key" mode will attempt to query for an account key if no authentication parameters for the account are provided. environment variable: azure_storage_auth_mode.. The parameter '--connection-string' is optional. storage account connection string. environment variable: azure_storage_connection_string.. The parameter '--dryrun' is optional. show the summary of the operations to be taken instead of actually downloading the file(s).. The parameter '--max-connections' is optional. maximum number of parallel connections to use when the blob size exceeds 64mb.. The parameter '--no-progress' is optional. include this flag to disable progress reporting for the command.. The parameter '--pattern' is optional. the pattern used for globbing files or blobs in the source. the supported patterns are '*', '?', '[seq]', and '[!seq]'. for more information, please refer to https://docs.python.org/3.7/library/fnmatch.html.. The parameter '--sas-token' is optional. a shared access signature (sas). must be used in conjunction with storage account name. environment variable: azure_storage_sas_token.. The parameter '--socket-timeout' is optional. the socket timeout(secs), used by the service to regulate data flow.. 