def acquire_blob_lease(self, container_name, blob_name,<EOL>lease_duration=-<NUM_LIT:1>,<EOL>proposed_lease_id=None,<EOL>if_modified_since=None,<EOL>if_unmodified_since=None,<EOL>if_match=None,<EOL>if_none_match=None, timeout=None):
_validate_not_none('<STR_LIT>', lease_duration)<EOL>if lease_duration is not -<NUM_LIT:1> and(lease_duration < <NUM_LIT:15> or lease_duration > <NUM_LIT>):<EOL><INDENT>raise ValueError(_ERROR_INVALID_LEASE_DURATION)<EOL><DEDENT>lease = self._lease_blob_impl(container_name,<EOL>blob_name,<EOL>_LeaseActions.Acquire,<EOL>None,  <EOL>lease_duration,<EOL>None,  <EOL>proposed_lease_id,<EOL>if_modified_since,<EOL>if_unmodified_since,<EOL>if_match,<EOL>if_none_match,<EOL>timeout)<EOL>return lease['<STR_LIT:id>']<EOL>
Requests a new lease. If the blob does not have an active lease, the Blob
service creates a lease on the blob and returns a new lease ID.

:param str container_name:
    Name of existing container.
:param str blob_name:
    Name of existing blob.
:param int lease_duration:
    Specifies the duration of the lease, in seconds, or negative one
    (-1) for a lease that never expires. A non-infinite lease can be
    between 15 and 60 seconds. A lease duration cannot be changed
    using renew or change. Default is -1 (infinite lease).
:param str proposed_lease_id:
    Proposed lease ID, in a GUID string format. The Blob service
    returns 400 (Invalid request) if the proposed lease ID is not
    in the correct format. 
:param datetime if_modified_since:
    A DateTime value. Azure expects the date value passed in to be UTC.
    If timezone is included, any non-UTC datetimes will be converted to UTC.
    If a date is passed in without timezone info, it is assumed to be UTC. 
    Specify this header to perform the operation only
    if the resource has been modified since the specified time.
:param datetime if_unmodified_since:
    A DateTime value. Azure expects the date value passed in to be UTC.
    If timezone is included, any non-UTC datetimes will be converted to UTC.
    If a date is passed in without timezone info, it is assumed to be UTC.
    Specify this header to perform the operation only if
    the resource has not been modified since the specified date/time.
:param str if_match:
    An ETag value, or the wildcard character (*). Specify this header to perform
    the operation only if the resource's ETag matches the value specified.
:param str if_none_match:
    An ETag value, or the wildcard character (*). Specify this header
    to perform the operation only if the resource's ETag does not match
    the value specified. Specify the wildcard character (*) to perform
    the operation only if the resource does not exist, and fail the
    operation if it does exist.
:param int timeout:
    The timeout parameter is expressed in seconds.
:return: the lease ID of the newly created lease.
:return: str