find substring in string python

fullstring = "StackAbuse"
substring = "tack"

if fullstring.find(substring) != -1:
    print "Found!"
else:
    print "Not found!"

>>> x = "Hello World!"
>>> x[2:]
'llo World!'
>>> x[:2]
'He'
>>> x[:-2]
'Hello Worl'
>>> x[-2:]
'd!'
>>> x[2:-2]
'llo Worl'

>>> str = "Messi is the best soccer player"
>>> "soccer" in str
True
>>> "football" in str
False

def find_all(a_str, sub):
    start = 0
    while True:
        start = a_str.find(sub, start)
        if start == -1: return
        yield start
        start += len(sub) # use start += 1 to find overlapping matches

list(find_all('spam spam spam spam', 'spam')) # [0, 5, 10, 15]

def find_string(string,sub_string):
	return string.find(sub_string)
#.find() also accounts for multiple occurence of the substring in the given string

if "blah" not in somestring: 
    continue

word = 'geeks for geeks'
  
# returns first occurrence of Substring 
result = word.find('geeks') 
print ("Substring 'geeks' found at index:", result ) 
  
result = word.find('for') 
print ("Substring 'for ' found at index:", result ) 
  
# How to use find() 
if (word.find('pawan') != -1): 
    print ("Contains given substring ") 
else: 
    print ("Doesn't contains given substring") 

type('hello world') == str
# output: True

type(10) == str
# output: False

s=s[start:end]