Python String Operations - 9

# STRIN LSTRIP & RSTRIP

txt = "     banana     "

x = txt.lstrip() 

y = txt.rstrip()

print("of all fruits", x, "is my favorite")

print("of all fruits", y, "is my favorite")

of all fruits banana      is my favorite
of all fruits      banana is my favorite

Python String Operations - 8

#STRING INDEX

txt = "Hello, Hello to my world."​

x = txt.index("Hello")​

print(x) 

​

#If the value is not found, the find() method returns -1, but the index() method will raise an exception:

txt = "Hello, welcome to my world."​

print(txt.find("q"))

print(txt.index("q")) 

0
-1

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
Cell In [26], line 12
      9 txt = "Hello, welcome to my world."
     11 print(txt.find("q"))
---> 12 print(txt.index("q")) 

ValueError: substring not found

Python String Operations - 7

#STRING FIND

​

txt = "Hello, welcome to my world."​

x = txt.find("welcome")​

print(x) 

​

txt = "Hello, welcome to my world."​

x = txt.find("mani")​

print(x) 

​

​

txt = "Hello, welcome to my world."​

x = txt.find("e", 5, 10)​

print(x) 

7
-1
8

Python String Operations - 6

#STRING ENDS WITH

txt = "Hello, welcome to my world."​

x = txt.endswith(".")​

print(x) 

​

txt = "Hello, welcome to my world."​

x = txt.endswith("my world.")​

print(x) 

​

txt = "Hello, welcome to my world."​

x = txt.endswith("my world.", 5, 11)​

print(x) 

True
True
False

Python String Operations - Encode

#ENCODE

txt = "My name is Ståle"​

x = txt.encode()​

print(x) 

​

​

​

txt = "My name is Ståle"​

print(txt.encode(encoding="ascii",errors="backslashreplace"))

print(txt.encode(encoding="ascii",errors="ignore"))

print(txt.encode(encoding="ascii",errors="namereplace"))

print(txt.encode(encoding="ascii",errors="replace"))

print(txt.encode(encoding="ascii",errors="xmlcharrefreplace"))

b'My name is St\xc3\xa5le'
b'My name is St\\xe5le'
b'My name is Stle'
b'My name is St\\N{LATIN SMALL LETTER A WITH RING ABOVE}le'
b'My name is St?le'
b'My name is Ståle'

Python String Operation - 5

#STRING PADDING - CENTER

txt = "Buddy"​

x = txt.center(20, "O")​

print(x) 

​

#COUNT

​

txt = "I love apples, apple are my favorite fruit"​

x = txt.count("apple")​

print(x) 

​

##SYNTAX

##string.count(value, start, end) 

​

txt = "I love apples, apple are my favorite fruit"​

x = txt.count("apple", 10, 24)​

print(x) 

OOOOOOOBuddyOOOOOOOO
2
1

Python String Operations - 4

 #ESCAPE CHARACTERS

txt = "We are the \"Buddies\" from the south."

print("OUTPUT 1 : ",txt)

​

txt = 'It\'s alright.'

print("OUTPUT 2 : ",txt) 

​

txt = "This will insert one \\ (backslash)."

print("OUTPUT 3 : ",txt) 

​

txt = "Hello\nBuddy!"

print("OUTPUT 4 : ",txt) 

​

txt = "Hello\rBuddy!"

print("OUTPUT 5 : ",txt) 

​

txt = "Hello\tBuddy!"

print("OUTPUT 6 : ",txt) 

​

#THIS EXAMPLE ERASES ONE CHARACTER (BACKSPACE):

txt = "Hello \bBuddy!"

print("OUTPUT 7 : ",txt) 

OUTPUT 1 :  We are the "Buddies" from the south.
OUTPUT 2 :  It's alright.
OUTPUT 3 :  This will insert one \ (backslash).
OUTPUT 4 :  Hello
Buddy!
Buddy! 5 :  Hello
OUTPUT 6 :  Hello	Buddy!
OUTPUT 7 :  HelloBuddy!