AI Basics with AK

Season 02 - Introduction to Python Programming

Arun Koundinya Parasa

Episode 05

Strings & Characters - Part2

Agenda

• Strings { Last Episode }
• String Mathematical Operations { Last Episode }
• Indexing { Last Episode }
• Slicing { Last Episode }
• String Operations
• New Style Operators { Next Episode }

String Operations

• Split
• Join

var = "It is a very beautiful day!"
print(var)
splitvariable = var.split()
print("\n",splitvariable)
print("\n",len(splitvariable))

It is a very beautiful day!

 ['It', 'is', 'a', 'very', 'beautiful', 'day!']

 6

print(var.split('d'))
print("\n",len(var.split('d')))

['It is a very beautiful ', 'ay!']

 2

print(var.split('!'))
print("\n",len(var.split('!')))

['It is a very beautiful day', '']

 2

var = "I have 10$ cash with me!"
print(var)
splitvariable = var.split('$')
print("\n",splitvariable)
print("\n",len(splitvariable))

I have 10$ cash with me!

 ['I have 10', ' cash with me!']

 2

splitvariable[0]

'I have 10'

splitvariable[0].split()

['I', 'have', '10']

splitvariable[0].split()[2]

'10'

print(splitvariable)

''.join(splitvariable)

['I have 10', ' cash with me!']

'I have 10 cash with me!'

'$'.join(splitvariable)

'I have 10$ cash with me!'

var = ["I","want","to","dance","now!"]

' '.join(var)

'I want to dance now!'

'space'.join(var)

'Ispacewantspacetospacedancespacenow!'

join_seperator = " %& "
var = ["This","is","just","an","Example"]
print(join_seperator.join(var))
print(" ")
print(type(join_seperator.join(var)))

This %& is %& just %& an %& Example
 
<class 'str'>

print(type(var))

<class 'list'>

this is list variable type which we wil discuss in future episodes.

String Operations

Strip

new_var = "  Wow! there is a tree!! over there! "
print(new_var)

  Wow! there is a tree!! over there! 

new_var.strip()

'Wow! there is a tree!! over there!'

new_var.lstrip()

'Wow! there is a tree!! over there! '

new_var.rstrip()

'  Wow! there is a tree!! over there!'

new_var2 = "What the program \\ "
print(new_var2)

What the program \ 

new_var2.strip(' \\ ')

'What the program'

new_var3 = "Hi!!! I Miss you a lot ..:)"
new_var3.strip(':().!')

'Hi!!! I Miss you a lot '

new_var3.strip(':().!' + ' ')

'Hi!!! I Miss you a lot'

String Operations

• Find
• Replace & Case

var = '''You know my name
You know my name
You know my name
You know my name
You know my name
You know my name
'''

var.find('You')

0

var.rfind('You')

85

var.find('you')

-1

var.startswith('You')

True

var.endswith('name')

False

var.endswith('\n')

True

var

'You know my name\nYou know my name\nYou know my name\nYou know my name\nYou know my name\nYou know my name\n'

var.count('You know my name')

6

Replace

new_var = var.replace('You','I')

print(new_var)

I know my name
I know my name
I know my name
I know my name
I know my name
I know my name

print(var.replace('You','I',3))

I know my name
I know my name
I know my name
You know my name
You know my name
You know my name

CaseStatement

var = "i am a spiritual cognitive scientist."
var.capitalize()

'I am a spiritual cognitive scientist.'

print( var.upper() )
print(" ")
print(var.lower())

I AM A SPIRITUAL COGNITIVE SCIENTIST.
 
i am a spiritual cognitive scientist.

print(var.title())
print("")
print(var.title().swapcase())

I Am A Spiritual Cognitive Scientist.

i aM a sPIRITUAL cOGNITIVE sCIENTIST.

Thank You