ネット上でいくつかの例を探して改善した.

# -*- coding: UTF-8 -*- 
import re

#     
test = u'
hello   , world   
'

#       
chinese_pattern = u'[\u4e00-\u9fa5]+'
says = re.findall(chinese_pattern, test)

#        
hi = ''
for say in says:
    print(say)
    hi += say + ','
hi = hi.strip(',')

#     ：  ,  
print(hi)

  
def Find(string): 
    # findall()              
    url = re.findall('https?://(?:[-\w.]|(?:%[\da-fA-F]{2}))+', string)
    return url 
      
 
string = 'Runoob       ：https://www.runoob.com，Google       ：https://www.google.com'
print("Urls: ", Find(string))