爬虫類の問題解決--UserWarning:BeautifulSoup(YOUR_MARKUP,"lxml")--Binrry(氷蕊)

質問:
UserWarning: No parser was explicitly specified, so I’m using the best available HTML parser for this system (“lxml”). This usually isn’t a problem, but if you run this code on another system, or in a different virtual environment, it may use a different parser and behave differently.
The code that caused this warning is on line 193 of the file …runpy.py. To get rid of this warning, change code that looks like this:
BeautifulSoup(YOUR_MARKUP})
to this:
BeautifulSoup(YOUR_MARKUP, “lxml”)
markup_type=markup_type))
元のコード:

from urllib.request import urlopen
from bs4 import BeautifulSoup
html=urlopen("http://pythonscraping.com/pages/page1.html")
bsObj=BeautifulSoup(html.read())
print(bsObj.h1)

UserWarning:

bsObj=BeautifulSoup(html.read())

次のようにします.

bsObj=BeautifulSoup(html.read(), "lxml")

解決後のコード:

from urllib.request import urlopen
from bs4 import BeautifulSoup
html=urlopen("http://pythonscraping.com/pages/page1.html")
bsObj=BeautifulSoup(html.read(), "lxml")
print(bsObj.h1)