String methods & built in functions: 12th cbse

String methods & built in functions:

len() capitalize() find(sub[,start[, end]]) isalnum() isalpha()

isdigit() lower() islower() isupper() upper() lstrip()

rstrip() isspace() istitle() replace(old,new) join ()

swapcase() partition(sep) split([sep[,maxsplit]])

Example:

>>> s='Congratulations'

>>> len(s)

15

>>> s.capitalize()

'Congratulations'

>>> s.find('al')

-1

>>> s.find('la')

8

>>> s[0].isalnum()

True

>>> s[0].isalpha()

True

>>> s[0].isdigit()

False

>>> s.lower()

'congratulations'

>>> s.upper()

'CONGRATULATIONS'

>>> s[0].isupper()

True

>>> s[1].isupper()

False

>>> s.replace('a','@')

'Congr@tul@tions'

>>> s.isspace()

False

>>> s.swapcase()

'cONGRATULATIONS'

>>> s.partition('a')

('Congr', 'a', 'tulations')

>>> s.split('ra',4)

['Cong', 'tulations']

>>> s.split('a')

['Congr', 'tul', 'tions']

>>> a=' abc '

>>> a.lstrip()

'abc '

>>> a.rstrip()

' abc'

Examples:

Example: Write a program to input any string and count number of uppercase and lowercase letters.

Code:

s=raw_input("Enter any String")

rint s

u=0

l=0

i=0

while i<len(s):

if (s[i].islower()==True):

l+=1

if (s[i].isupper()==True):

u+=1

i+=1

print "Total upper case letters :", u

print "Total Lower case letters :", l

Output:

Enter any String Python PROG

Python PROG

Total upper case letters: 5

Total Lower case letters: 5