如何使用 Amazon Textract 以同步方式分析 PDF 文档？

Question

我想从我拥有的一堆 PDF 中提取表格。 为此，我使用 AWS Textract Python 管道。

请指教在没有 SNS 和 SQS 的情况下我该怎么做？ 我希望它是同步的：为我的管道提供一个 PDF 文件，调用 AWS Textract 并获取结果。

这是我同时使用的，请指教我应该改变什么：

import boto3
import time

def startJob(s3BucketName, objectName):
    response = None
    client = boto3.client('textract')
    response = client.start_document_text_detection(
    DocumentLocation={
        'S3Object': {
            'Bucket': s3BucketName,
            'Name': objectName
        }
    })

    return response["JobId"]

def isJobComplete(jobId):
    # For production use cases, use SNS based notification 
    # Details at: https://docs.aws.amazon.com/textract/latest/dg/api-async.html
    time.sleep(5)
    client = boto3.client('textract')
    response = client.get_document_text_detection(JobId=jobId)
    status = response["JobStatus"]
    print("Job status: {}".format(status))

    while(status == "IN_PROGRESS"):
        time.sleep(5)
        response = client.get_document_text_detection(JobId=jobId)
        status = response["JobStatus"]
        print("Job status: {}".format(status))

    return status

def getJobResults(jobId):

    pages = []

    client = boto3.client('textract')
    response = client.get_document_text_detection(JobId=jobId)

    pages.append(response)
    print("Resultset page recieved: {}".format(len(pages)))
    nextToken = None
    if('NextToken' in response):
        nextToken = response['NextToken']

    while(nextToken):

        response = client.get_document_text_detection(JobId=jobId, NextToken=nextToken)

        pages.append(response)
        print("Resultset page recieved: {}".format(len(pages)))
        nextToken = None
        if('NextToken' in response):
            nextToken = response['NextToken']

    return pages

# Document
s3BucketName = "ki-textract-demo-docs"
documentName = "Amazon-Textract-Pdf.pdf"

jobId = startJob(s3BucketName, documentName)
print("Started job with id: {}".format(jobId))
if(isJobComplete(jobId)):
    response = getJobResults(jobId)

#print(response)

# Print detected text
for resultPage in response:
    for item in resultPage["Blocks"]:
        if item["BlockType"] == "LINE":
            print ('3[94m' +  item["Text"] + '3[0m')

Answer 1

目前不能直接用Textract同步处理PDF文档。来自 Textract documentation:

Amazon Textract synchronous operations (DetectDocumentText and AnalyzeDocument) support the PNG and JPEG image formats. Asynchronous operations (StartDocumentTextDetection, StartDocumentAnalysis) also support the PDF file format.

解决方法是在您的代码中 ，然后对这些图像使用同步 API 操作来处理文档。