python strip characters

syntax
re.sub(pattern, repl, string, max=0)
#!/usr/bin/python
import re

phone = "2004-959-559 # This is Phone Number"

# Delete Python-style comments
num = re.sub(r'#.*$', "", phone)
print "Phone Num : ", num
#output Phone Num :  2004-959-559

# Remove anything other than digits
num = re.sub(r'\D', "", phone)    
print "Phone Num : ", num
#output Phone Num :  2004959559

# Python3 program to demonstrate the use of 
# strip() method   
  
string = " python strip method test " 
  
# prints the string without stripping 
print(string)  
  
# prints the string by removing leading and trailing whitespaces 
print(string.strip())    
  
# prints the string by removing strip 
print(string.strip(' strip')) 
Output:
 python strip method test 
python strip method test
python method test

txt = "     banana     "
x = txt.strip()
#x will be "banana"

txt = "  test    "

txt.strip()
#Output: "test"

txt.lstrip()
#Output: "test    "

txt.rstrip()
#Output: "  test"