这段代码哪里错了，为什么运行不了提示出错？
#coding:utf-8
from BeautifulSoup import BeautifulSoup
html_doc = """
<html><head><title>The Dormouse's story</title></head>
<body>
<p class="title"><b>The Dormouse's story</b></p>
<p class="story">Once upon a time there were three little sisters; and their names were
<a href="http://example.com/elsie" class="sister" id="link1">Elsie</a>,
<a href="http://example.com/lacie" class="sister" id="link2">Lacie</a> and
<a href="http://example.com/tillie" class="sister" id="link3">Tillie</a>;
and they lived at the bottom of a well.</p>
<p class="story">...</p>
"""
soup = BeautifulSoup(html_doc, 'html.parser',from_encoding = 'utf-8')
print '获取所有的连接'
links = soup.find_all('a')
for link in links:
print link.name,link['href'],link.get_text()没法运行 = =
错误如下：
Traceback (most recent call last):
File "F:/final/hello.py", line 18, in <module>
soup = BeautifulSoup(html_doc, 'html.parser',from_encoding = 'utf-8')
File "F:\final\python27\BeautifulSoup.py", line 1522, in __init__
BeautifulStoneSoup.__init__(self, *args, **kwargs)
TypeError: __init__() got an unexpected keyword argument 'from_encoding'
