Using chardet to detect web page coding

#coding:utf-8  
'''''python 3.x'''  
  
import sys  
import urllib.request  
import chardet  
  
#  take data write file fname  
def writeFile(fname, data):  
    f = open(fname, "wb")  
    if f:  
        f.write(data)  
        f.close()  
  
def blog_detect(blogurl):  
    ''''' Check the encoding mode '''  
    try:  
        fp = urllib.request.urlopen(blogurl)  
    except Exception as e:  
        print(e)  
        print('download exception-[%s]' %blogurl)  
        return 0  
    blog = fp.read()    # python3.x read the html as html code bytearray  
    fp.close()  
    #writeFile("t.html", blog)  
      
    # get encoding string  
    codedetect = chardet.detect(blog)['encoding']  
    print('%s <- %s' %(blogurl, codedetect))  
    return 1  
  
if __name__=='__main__':  
    if len(sys.argv) == 1:  
        print('''''usage: 
            python DetectURLCoding.py http://xxx.com''')  
    else:  
        v = blog_detect(sys.argv[1])  
        print(v)  #  Why  hovertree.com

D:\profile\Desktop>PYTHON de.py http://hovertree.com/  
http://hovertree.com/ <- utf-8  
1  
  
D:\profile\Desktop>PYTHON de.py http://photo.cankaoxiaoxi.com/roll10/2015/0318/709734.shtml  
http://photo.cankaoxiaoxi.com/roll10/2015/0318/709734.shtml <- utf-8  
1