Question

出现以下错误：

Traceback (most recent call last):
  File "test.gyp", line 37, in <module>
    for x in url_list["pdf"]:
KeyError: 'pdf'

以前的代码运行正常时。除了将实际的.gyp文件临时移至哪个目录之外，我没有更改代码。为什么这突然成为一个问题的线索？

#!/usr/bin/env python3
import os
import glob
import pdfx
import wget
import urllib.parse
import requests

## Accessing and Creating Six Digit File Code
pdf_dir = "./"
pdf_files = glob.glob("%s/*.pdf" % pdf_dir)

for file in pdf_files:
    ## Identify File Name and Limit to Digits
    filename = os.path.basename(file)
    newname = filename[0:6]
    
    ## Run PDFX to identify and download links
    pdf = pdfx.PDFx(filename)
    url_list = pdf.get_references_as_dict()
    attachment_counter = (1)

    for x in url_list["url"]:
        if x[0:4] == "http":
            parsed_url = urllib.parse.quote(x)
            extension = os.path.splitext(x)[1]
            r = requests.get(x)
            with open('temporary', 'wb') as f:
                f.write(r.content)

            ##Concatenate File Name Once Downloaded
            os.rename('./temporary', str(newname) + '_attach' + str(attachment_counter) + str(extension))
            
            ##Increase Attachment Count
            attachment_counter += 1
    
    for x in url_list["pdf"]:
        if x[0:4] == "http":
            parsed_url = urllib.parse.quote(x)
            extension = os.path.splitext(x)[1]
            r = requests.get(x)
            with open('temporary', 'wb') as f:
                f.write(r.content)

            ##Concatenate File Name Once Downloaded
            os.rename('./temporary', str(newname) + '_attach' + str(attachment_counter) + str(extension))
            
            ##Increase Attachment Count
            attachment_counter += 1

这是我打印出整体url_list时的一个小片段，您可以看到它正在向字典中添加项目（此处出于隐私目的进行了编辑），并标记为“ pdf”-因此，我确实处于为什么最终会给我错误的原因不知所措。

'pdf': ['URLSHOWSHERE.pdf']}

Answer 1

由于字典 url_list 没有名为“ pdf”的键，导致出现此错误。请通过显式打印字典来至少检查一下字典，以了解其内容。

KeyError：现在显示“ pdf”；代码以前可以正常工作-为什么？

1 个答案: