def get_function(FunctionName=None, Qualifier=None):
    """
    Returns the configuration information of the Lambda function and a presigned URL link to the .zip file you uploaded with  CreateFunction so you can download the .zip file. Note that the URL is valid for up to 10 minutes. The configuration information is the same information you provided as parameters when uploading the function.
    Using the optional Qualifier parameter, you can specify a specific function version for which you want this information. If you don't specify this parameter, the API uses unqualified function ARN which return information about the $LATEST version of the Lambda function. For more information, see AWS Lambda Function Versioning and Aliases .
    This operation requires permission for the lambda:GetFunction action.
    See also: AWS API Documentation
    
    Examples
    This operation retrieves a Lambda function's event source mapping
    Expected Output:
    
    :example: response = client.get_function(
        FunctionName='string',
        Qualifier='string'
    )
    
    
    :type FunctionName: string
    :param FunctionName: [REQUIRED]
            The Lambda function name.
            You can specify a function name (for example, Thumbnail ) or you can specify Amazon Resource Name (ARN) of the function (for example, arn:aws:lambda:us-west-2:account-id:function:ThumbNail ). AWS Lambda also allows you to specify a partial ARN (for example, account-id:Thumbnail ). Note that the length constraint applies only to the ARN. If you specify only the function name, it is limited to 64 characters in length.
            

    :type Qualifier: string
    :param Qualifier: Using this optional parameter to specify a function version or an alias name. If you specify function version, the API uses qualified function ARN for the request and returns information about the specific Lambda function version. If you specify an alias name, the API uses the alias ARN and returns information about the function version to which the alias points. If you don't provide this parameter, the API uses unqualified function ARN and returns information about the $LATEST version of the Lambda function.

    :rtype: dict
    :return: {
        'Configuration': {
            'FunctionName': 'string',
            'FunctionArn': 'string',
            'Runtime': 'nodejs'|'nodejs4.3'|'nodejs6.10'|'java8'|'python2.7'|'python3.6'|'dotnetcore1.0'|'nodejs4.3-edge',
            'Role': 'string',
            'Handler': 'string',
            'CodeSize': 123,
            'Description': 'string',
            'Timeout': 123,
            'MemorySize': 123,
            'LastModified': 'string',
            'CodeSha256': 'string',
            'Version': 'string',
            'VpcConfig': {
                'SubnetIds': [
                    'string',
                ],
                'SecurityGroupIds': [
                    'string',
                ],
                'VpcId': 'string'
            },
            'DeadLetterConfig': {
                'TargetArn': 'string'
            },
            'Environment': {
                'Variables': {
                    'string': 'string'
                },
                'Error': {
                    'ErrorCode': 'string',
                    'Message': 'string'
                }
            },
            'KMSKeyArn': 'string',
            'TracingConfig': {
                'Mode': 'Active'|'PassThrough'
            }
        },
        'Code': {
            'RepositoryType': 'string',
            'Location': 'string'
        },
        'Tags': {
            'string': 'string'
        }
    }
    
    
    :returns: 
    (string) --
    
    """
    pass
