def describe_launch_configurations(LaunchConfigurationNames=None, NextToken
    =None, MaxRecords=None):
    """
    Describes one or more launch configurations.
    See also: AWS API Documentation
    
    Examples
    This example describes the specified launch configuration.
    Expected Output:
    
    :example: response = client.describe_launch_configurations(
        LaunchConfigurationNames=[
            'string',
        ],
        NextToken='string',
        MaxRecords=123
    )
    
    
    :type LaunchConfigurationNames: list
    :param LaunchConfigurationNames: The launch configuration names. If you omit this parameter, all launch configurations are described.
            (string) --
            

    :type NextToken: string
    :param NextToken: The token for the next set of items to return. (You received this token from a previous call.)

    :type MaxRecords: integer
    :param MaxRecords: The maximum number of items to return with this call. The default value is 50 and the maximum value is 100.

    :rtype: dict
    :return: {
        'LaunchConfigurations': [
            {
                'LaunchConfigurationName': 'string',
                'LaunchConfigurationARN': 'string',
                'ImageId': 'string',
                'KeyName': 'string',
                'SecurityGroups': [
                    'string',
                ],
                'ClassicLinkVPCId': 'string',
                'ClassicLinkVPCSecurityGroups': [
                    'string',
                ],
                'UserData': 'string',
                'InstanceType': 'string',
                'KernelId': 'string',
                'RamdiskId': 'string',
                'BlockDeviceMappings': [
                    {
                        'VirtualName': 'string',
                        'DeviceName': 'string',
                        'Ebs': {
                            'SnapshotId': 'string',
                            'VolumeSize': 123,
                            'VolumeType': 'string',
                            'DeleteOnTermination': True|False,
                            'Iops': 123,
                            'Encrypted': True|False
                        },
                        'NoDevice': True|False
                    },
                ],
                'InstanceMonitoring': {
                    'Enabled': True|False
                },
                'SpotPrice': 'string',
                'IamInstanceProfile': 'string',
                'CreatedTime': datetime(2015, 1, 1),
                'EbsOptimized': True|False,
                'AssociatePublicIpAddress': True|False,
                'PlacementTenancy': 'string'
            },
        ],
        'NextToken': 'string'
    }
    
    
    :returns: 
    (string) --
    
    """
    pass
