Question

当我尝试从多个网站进行网络搜索时出现此错误

import urllib
urls = ["http://google.com","http://cnn.com"]

i=0
n=len(urls)

while i< n:
htmlfile = urllib.urlopen(urls[i])
htmltext =htmlfile.read()
print htmltext
i=i+1

错误：

  PS C:\python> python basic1.py
  File "basic1.py", line 9
  htmlfile = urllib.urlopen(urls[i])
  IndentationError: expected an indented block

Answer 1

import urllib 

urls = ["http://google.com","http://cnn.com"]

i=0
n=len(urls)

while i < n:
   htmlfile = urllib.urlopen(urls[i])
   htmltext =htmlfile.read()
   print htmltext
   i=i+1

Answer 2

您收到该错误是因为您没有缩进。 Python需要严格缩进作为代码块分隔符。试试这个：

i=0
n=len(urls)

while i< n:
    htmlfile = urllib.urlopen(urls[i])
    htmltext =htmlfile.read()
    print htmltext
    i=i+1

Answer 3

你有缩进错误，这意味着，你的某些子块需要在它之前有4个空格，这在你的while代码块中很明显，这是正确的方法：

import urllib
urls = ["http://google.com","http://cnn.com"]

i=0
n=len(urls)

while i< n:
    htmlfile = urllib.urlopen(urls[i])
    htmltext =htmlfile.read()
    print htmltext
    i=i+1

IndentationError：期望while循环中的缩进块

3 个答案: