Question

我安装了 anaconda，下面是在 jupyter 笔记本中完美运行的代码。

from bs4 import BeautifulSoup as bs
xml = '<head><body></body></head>'
s = bs(xml,'xml')
print(s)

输出：

<?xml version="1.0" encoding="utf-8"?>
<Head><body/></Head>

但是，如果我尝试使用 Windows 命令提示符运行相同的代码，则会引发以下错误：

F:\ ProgramData\ Anaconda3 & gt;python testcode.py Traceback (最近一次调用最后一次):文件“testcode.py”，第 4 行，在 s = bs (xml,'xml') 文件“F:\ ProgramData\ Anaconda3\ lib\ site-packages\ bs4__init__.py”，第 198 行

我甚至试图将脚本复制到“F:\ ProgramData\ Anaconda3”文件夹中,并从此处运行命令提示符。但同样的错误

注意：F:是 OS 驱动器。

我如何解决这个问题？

什么应该是根目录（在 anaconda 窗口）运行 python 脚本，以便它可以找到 conda 包？

从该位置运行 python 控制台的一些观察结果：

F:\ProgramData\Anaconda3>python
Python 3.7.0 (default, Jun 28 2018, 08:04:48) [MSC v.1912 64 bit (AMD64)] :: Ana
conda, Inc. on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import xml
>>> from bs4 import BeautifulSoup as bs
>>> s = bs("<head></head>","xml")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "F:\ProgramData\Anaconda3\lib\site-packages\bs4\__init__.py", line 198, i
n __init__
    % ",".join(features))
bs4.FeatureNotFound: Couldn't find a tree builder with the features yoequeste
d: xml. Do you need to install a parser library?
>>> import lxml
>>> s = bs("<head></head>","lxml")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "F:\ProgramData\Anaconda3\lib\site-packages\bs4\__init__.py", line 198, i
n __init__
    % ",".join(features))
bs4.FeatureNotFound: Couldn't find a tree builder with the features yoequeste
d: lxml. Do you need to install a parser library?
>>>