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PlacementType

Source code in docs_src/capo_emr/types/placement_type.py 
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class PlacementType(TypedDict, closed=True):
    availability_zone: NotRequired["capo_emr.types.xml_string.XmlString"]
    """<p>The Amazon EC2 Availability Zone for the cluster. <code>AvailabilityZone</code> is used for uniform instance groups, while <code>AvailabilityZones</code> (plural) is used for instance fleets.</p>"""
    availability_zones: NotRequired[
        "capo_emr.types.xml_string_max_len256_list.XmlStringMaxLen256List"
    ]
    """<p>When multiple Availability Zones are specified, Amazon EMR evaluates them and launches instances in the optimal Availability Zone. <code>AvailabilityZones</code> is used for instance fleets, while <code>AvailabilityZone</code> (singular) is used for uniform instance groups.</p> <note> <p>The instance fleet configuration is available only in Amazon EMR releases 4.8.0 and later, excluding 5.0.x versions.</p> </note>"""

availability_zone instance-attribute 

availability_zone: NotRequired[XmlString]

The Amazon EC2 Availability Zone for the cluster. AvailabilityZone is used for uniform instance groups, while AvailabilityZones (plural) is used for instance fleets.

availability_zones instance-attribute 

availability_zones: NotRequired[XmlStringMaxLen256List]

When multiple Availability Zones are specified, Amazon EMR evaluates them and launches instances in the optimal Availability Zone. AvailabilityZones is used for instance fleets, while AvailabilityZone (singular) is used for uniform instance groups.

The instance fleet configuration is available only in Amazon EMR releases 4.8.0 and later, excluding 5.0.x versions.