Question

我正在尝试提取和打印网址及其名称（在html文件中存在的<a href='url' title='smth'>NAME</a>之间（保存在磁盘中），不使用使用BeautifulSoup或其他库。只是初学者的Python代码。许愿的印刷格式是：

http://..filepath/filename.pdf
File's Name
so on...

我能够单独提取和打印所有网址或所有名称，但是我无法在标记之前的代码中附加一段时间后跟随的所有名称，并将其打印在每个网址下方。我的代码变得混乱，我很堆栈。到目前为止，这是我的代码：

import os
with open (os.path.expanduser('~/SomeFolder/page.html'),'r') as html:
    txt = html.read()
# for urls
nolp = 0
urlarrow = []
while nolp == 0:
    pos = txt.find("href")
    if pos >= 0:
      txtcount = len(txt)
      txt = txt[pos:txtcount]
      pos = txt.find('"')
      txtcount = len(txt)
      txt = txt[pos+1:txtcount]
      pos = txt.find('"')
      url = txt[0:pos]
      if url.startswith("http") and url.endswith("pdf"):
          urlarrow.append(url)
    else:
      nolp = 1
for item in urlarrow:
  print(item)

#for names
almost identical code to the above

html.close()

如何让它发挥作用？我需要将它们组合成一个函数或def但是如何？ PS。我在下面发布了一个答案，但我认为可能有更简单的Pythonic解决方案

Answer 1

这是我需要的正确输出，但我相信有更好的方法。

import os
with open ('~/SomeFolder/page.html'),'r') as html:
    txt = html.read()
    text = txt
#for urls    
nolp = 0
urlarrow = []
while nolp == 0:
    pos = txt.find("href")
    if pos >= 0:
      txtcount = len(txt)
      txt = txt[pos:txtcount]
      pos = txt.find('"')
      txtcount = len(txt)
      txt = txt[pos+1:txtcount]
      pos = txt.find('"')
      url = txt[0:pos]
      if url.startswith("http") and url.endswith("pdf"):
          urlarrow.append(url)
    else:
      nolp = 1

with open (os.path.expanduser('~/SomeFolder/page.html'),'r') as html:
    text = html.read()

#for names  
noloop = 0
namearrow = []
while noloop == 0:
    posB = text.find("title")
    if posB >= 0:
      textcount = len(text)
      text = text[posB:textcount]
      posB = text.find('"')
      textcount = len(text)
      text = text[posB+19:textcount] #because string starts 19 chars after the posB
      posB = text.find('</')
      name = text[1:posB]
      if text[0].startswith('>'):
          namearrow.append(name)
    else:
      noloop = 1

fullarrow = []
for pair in zip(urlarrow, namearrow):
    for item in pair:
        fullarrow.append(item)
for instance in fullarrow:
    print(instance)

html.close()

提取网址和他们的名称是存储在磁盘上的html文件并分别打印出来 - Python

1 个答案: