String

  

       PYTHON

       STRINGS

       Fill in the blanks

      

       1. Collection of character is called String

       2.String can be created by enclosing characters inside a single quote or double quotes.[T/F].   True.

       3.a="flowers".print(a[4])=  e

       4.b="python".print(b[-3])=h

       5. a="python".print(a[-4:5])=  tho

       6.String is immutable

       7.We can delete or remove character from string .[T/F]  .False

       8.str1='python'.str2='world'.print(str1+str2)=  pythonworld

       9.x='python'.enum(x)=[(0,'p'),(1,'y'),(2,'t'),(3,'h'),(4,'o'),(5,'n')]

       10.x=34.7868787.print('The value of x is %3.2f' %x).  34.78

       11.s="hello world ".s.capitalize() = Hello World

       12.s='I am an Indian'.s.count('an',0,len(str))  =  2

       13. s='I am an Indian'.s.find('In',0,len(str))  =  8

       14. s='I am an Indian'.s.replace('an','us')  =  I am us Indius.

       15.a="Hello".   a.isalpha()=  True

       16. a="Hello".   a.isdigit()=  False

       17. a="welcome".   a.upper()  =   WELCOME

       18. a="WELCOME".   a.lower() = welcome

       19. a="WelCome".   a.swapcase()=  wELcOME

       20. x="    Hi hello     ".  x.strip() =   "Hi hello".

 

       Answer the following questions

                                                              (10 marks)

       1.Write a program for below string Method

§  capitalize()

§  center()

§  count()

§  find()

§  replace()

§  isalpha()

§  isdigit()

§  islower()

§  isnumeric()

§  isspace()

§  istitle()

§  isupper()

§  len()

§  lower()

§  upper()

§  lower()

§  strip()

§  swapcase()

§  split()

§  join()

captilize()

syntax

string.captilize()

>>>str="welcome to traineetech "

>>>str.captilize()

Welcome To Traineetech

center

syntax

string.center(width[,fillchar])

parameters

     width ? this is the total width of the string.

     fillchar ? this is the filler character.

for example

>>>str1=" welcome to traineetech "

>>> str1.center(40,"#")

'######### welcome to traineetech #########'

count()

syntax

string.count(substring,starindex=0,endindex=len(string))

for example

>>>str="I am an indian"

>>>str.count("an",0,len(str))

2

>>> 

find()

>>>str="i am an indian"

>>>str.count("an",0,len(str))

2

>>>str.find("an",0,len(str))

5

>>>str.find("am",0,len(str))

2

>>>str.find("um",0,len(str))

-1

Replace()

syntax

following is the syntax for replace()method-

str.replace(old,new[,max])

for example

>>>str="I am an indian"

>>>str.replace("an","us")

'I am us Indius'

isalpha()

>>>string="hai "

>>>string.isalpha()

true

isdigit()

>>>a="1234"

>>>a.isdigit()

true

>>> 

islower()

>>> string=" welcome to traineetech "

>>> string.islower()

True

isnumeric()

>>> a="1234"

>>>a.numeric()

True

isspace()

>>> string="   "

>>> string.isspace()

True

>>> 

istitle()

>>> string=" Welcome To Traineetech "

>>>string.istitle()

True

>>> string2=" WELCOME TO TRAINEETECH "

>>>string2.istitle()

False

>>> 

isupper()

for example

>>>string1="Hai"

>>>string1.upper()

'HAI'

lower()

>>>string1.lower()

'hai'

len(string)

>>>len(string1)

3

>>> 

lstrip() - left strip(removes left space)

rstrip() - Right strip(removes right space)

strip() - removes all space

for example

>>>string="        TRAINEETECH        "

>>>string

'          TRAINEETECH         '

>>>string.lstrip()

' TRAINEETECH             '

>>>string.rstrip()

'                TRAINEETECH '

>>>string.strip()

' TRAINEETECH '

>>> 

upper()

for example

>>>string="I am an indian"

>>>string.upper()

I AM AN INDIAN

swapcase()

>>>str="I am an indian"

>>>str.swapcase()

'i AM AN iNDIAN'

split()

>>>"This will split all words into a list".split()

['This','will'.'split','all','words','into','a','list']

join()

>>>' '.join(['This','will','join','all','words','into','a','string'])

'This will join all words into a string'

>>>'Happy New Year'.find('ew')

7

>>>'Happy New  Year',replace('Happy','Bright')

'Bright New Year'