如何使用 google docs 将 PDF 内容提取到 .txt 文件中？

Question

如何以编程方式使用 google docs 以编程方式从 pdf 文件中提取文本？ 我都知道还有其他选择，但是，我很好奇是否可以将 google docs 用于此类目的。

Answer 1

当使用python将PDF数据检索为文本数据时，可以使用Drive API v3来实现。 但是需要2个步骤。

1. 将 PDF 文件上传为 Google 文档
2. 将 Google 文档下载为 TXT 文件

在此示例中，使用 Python 快速入门。 详细信息是https://developers.google.com/drive/v3/web/quickstart/python 。 请阅读“第 1 步：打开 Drive API”和“第 2 步：安装 Google 客户端库”。 如果你已经认识他们，我很抱歉。

当您使用以下示例脚本时，请进行如下修改。

1. 添加进口

请将以下导入添加到 Quickstart。

import io
from apiclient.http import MediaFileUpload, MediaIoBaseDownload

2. 更改范围

请将范围更改为以下。

SCOPES = 'https://www.googleapis.com/auth/drive'

3.改变main()

请将 Quickstart 的main()更改为此。

示例脚本

示例脚本可以将 PDF 文件转换为 TXT 文件。 但是PDF文件中的图片不能是TXT文件。

def main():
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('drive', 'v3', http=http)

    pdffile = 'sample.pdf' # PDF file
    txtfile = 'sample.txt' # Text file

    mime = 'application/vnd.google-apps.document'
    res = service.files().create(
        body={
            'name': pdffile,
            'mimeType': mime
        },
        media_body=MediaFileUpload(pdffile, mimetype=mime, resumable=True)
    ).execute()

    dl = MediaIoBaseDownload(
        io.FileIO(txtfile, 'wb'),
        service.files().export_media(fileId=res['id'], mimeType="text/plain")
    )
    done = False
    while done is False:
        status, done = dl.next_chunk()
    print("Done.")


if __name__ == '__main__':
    main()

如果我误解了你的问题，我很抱歉。

脚本添加了快速入门：

from __future__ import print_function
import httplib2
import os
import io

from apiclient import discovery
from oauth2client import client
from oauth2client import tools
from oauth2client.file import Storage
from apiclient.http import MediaFileUpload, MediaIoBaseDownload

try:
    import argparse
    flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
except ImportError:
    flags = None

# If modifying these scopes, delete your previously saved credentials
# at ~/.credentials/drive-python-quickstart.json
SCOPES = 'https://www.googleapis.com/auth/drive'
CLIENT_SECRET_FILE = 'client_secret.json'
APPLICATION_NAME = 'Drive API Python Quickstart'


def get_credentials():
    """Gets valid user credentials from storage.

    If nothing has been stored, or if the stored credentials are invalid,
    the OAuth2 flow is completed to obtain the new credentials.

    Returns:
        Credentials, the obtained credential.
    """
    credential_path = os.path.join("./", 'drive-python-quickstart.json')
    store = Storage(credential_path)
    credentials = store.get()
    if not credentials or credentials.invalid:
        flow = client.flow_from_clientsecrets(CLIENT_SECRET_FILE, SCOPES)
        flow.user_agent = APPLICATION_NAME
        if flags:
            credentials = tools.run_flow(flow, store, flags)
        else:  # Needed only for compatibility with Python 2.6
            credentials = tools.run(flow, store)
        print('Storing credentials to ' + credential_path)
    return credentials


def main():
    credentials = get_credentials()
    http = credentials.authorize(httplib2.Http())
    service = discovery.build('drive', 'v3', http=http)

    pdffile = '../Downloads/sample.pdf'  # PDF file
    txtfile = '../Downloads/sample.txt'  # Text file

    mime = 'application/vnd.google-apps.document'
    res = service.files().create(
        body={
            'name': pdffile,
            'mimeType': mime
        },
        media_body=MediaFileUpload(pdffile, mimetype=mime, resumable=True)
    ).execute()

    dl = MediaIoBaseDownload(
        io.FileIO(txtfile, 'wb'),
        service.files().export_media(fileId=res['id'], mimeType="text/plain")
    )
    done = False
    while done is False:
        status, done = dl.next_chunk()
    print("Done.")


if __name__ == '__main__':
    main()