以下是一个使用AWS CodePipeline和Python获取当前正在部署的提交名称的示例代码：

import boto3

def get_current_execution_id(pipeline_name):
    codepipeline = boto3.client('codepipeline')
    
    response = codepipeline.list_pipeline_executions(
        pipelineName=pipeline_name,
        maxResults=1
    )
    
    if 'pipelineExecutionSummaries' in response and len(response['pipelineExecutionSummaries']) > 0:
        execution_id = response['pipelineExecutionSummaries'][0]['pipelineExecutionId']
        return execution_id
        
    return None

def get_current_revision(pipeline_name, execution_id):
    codepipeline = boto3.client('codepipeline')
    
    response = codepipeline.get_pipeline_execution(
        pipelineName=pipeline_name,
        pipelineExecutionId=execution_id
    )
    
    if 'pipelineExecution' in response and 'artifactRevisions' in response['pipelineExecution']:
        revisions = response['pipelineExecution']['artifactRevisions']
        
        for revision in revisions:
            if revision['revisionChangeIdentifier'] == 'AppSpecFileName':
                return revision['revisionId']
    
    return None

pipeline_name = 'your-pipeline-name'
execution_id = get_current_execution_id(pipeline_name)

if execution_id:
    current_revision = get_current_revision(pipeline_name, execution_id)
    print('Current deployment revision:', current_revision)
else:
    print('No current deployment')

请确保已安装并配置了AWS SDK for Python（Boto3）。在代码中，首先使用list_pipeline_executions方法来获取最新的Pipeline执行ID，然后使用get_pipeline_execution方法获取执行ID对应的Pipeline执行信息。从Pipeline执行信息中获取到artifactRevisions列表，遍历该列表找到revisionChangeIdentifier为'AppSpecFileName'的revision，即为当前正在部署的提交名称。