如何使用PyExifTool返回EXIF标签 [英] How Return EXIF tags using PyExifTool

问题描述

我无法弄清楚如何使用 PyExifTool 从原始照片中提取EXIF标签.我要做的就是提取照片的创建日期，并使用该日期重命名项目文件夹.我已经尝试了多种方法，但不断出现一系列以"ValueError(无法解码JSON对象")结尾的错误.

I am having trouble figuring out how to extract an EXIF tag from a raw photo using PyExifTool. All I want to do is extract the date the photo was created and rename the project folder with that date. I've tried a variety of things I keep getting a series of errors ending with "ValueError("No JSON object could be decoded").

赞:

    import exiftool
    files = "CRW_1368.CRW"

    with exiftool.ExifTool() as et:
        metadata = et.get_tag(DateTimeOriginal, files)

    print execute_json(metadata)

我不清楚如何正确设置它.我对脚本还比较陌生.

It's not clear to me how to properly set it up. I am relatively new to scripting.

感谢您的帮助！

推荐答案

首先，您必须确保该标签存在.在我的测试中，没有 DateTimeOriginal 标记，因此我必须选择文件中实际存在的标记.我选择了"DateCreated".我收到未定义 execute_json 的错误.当我将其更改为 et.execute_json 时，我能够得到相同的错误.由于您只拉一个标签，因此应该可以打印它.通过快速更改您的打印对帐单，我得到了预期的日期/时间.

First, you have to make sure that the tag exists. In my test, there was no DateTimeOriginal tag, so I had to select a tag that was actually in my file. I chose 'DateCreated'. I got the error that execute_json wasn't defined. When I changed it to et.execute_json, I was able to get your same error. Since you're only pulling one tag, you should be able to just print it. By a quick change of your print statement, I got the expected date/time.

import exiftool
import os, errno
files = file.jpg

with exiftool.ExifTool() as et:
    metadata = et.get_tag('DateCreated', files)
    print(metadata)
# or, (skipping those two lines) as per your actual question
    new_folder = et.get_tag('DateCreated', files)
    try:
        os.makedirs(new_folder)
    except OSError as e:
        if e.errno != errno.EEXIST:
            raise

在我的情况下，使用print语句，获得了预期的结果我文件中的'2017:04:25 17:40:42'

And in my case, with the print statement, got back the expected '2017:04:25 17:40:42' from my file.

有关目录检查/创建的更新替代方法，请参见:如何创建目录(如果没有)存在吗?

For updated alternatives to directory checking/creating, see: How can I create a directory if it does not exist?

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