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Python Strings in hindi (Part -6)

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                                                String in Python


Python mai hm string ka use krte hai text information ko store krne ke liye jaise ki name, jaisa ki hm jante hai Python mai character nhi hota python mai character ko string of length one mana jata hai.
String ko single quotation mai bhi represent kr skte hai aur double quotation mai bhi represent kr skte hai. Let's see an example..
  
print('hey')

print("hey")

agar hame multiline string ko assign krna hai to ham wo bhi kr skte hai
example:


a = """hey, this is rishabh gupta
and I will teach you python from scratch 
enjoy the blog"""
print(a)

output

hey, this is rishabh gupta
and I will teach you python from scratch 
enjoy the blog

Python ki string ek array jaise hoti hai iska mtlb ye hua ki hm python string ki indexing kr skte hai (indexing krne ka mtlb hua position dena) , aur us string se hm koi bhi letter nikal skte hai , aaiye isko aur clear banane ke liye example ka sahara lete hai.

mystr="rishabh is good boy"
print(mystr)
rishabh is good boy
"ye baat hamesa yaad rakhiyega ki python follows the zero based index system jiska mtlb hai ki python m indexing 
zero se hoti hai , to hm hamesha zero se count karenge one se nhi "
"Python mai space bhi count hota hai"

print(mystr[4])
a
ap dekh skte hai ki 4th position mai a hai [0-r ,1-i,2-s,3-h,4-a,5-b,6-h,7-"space",8-i,and so on]
aur example ki madad se python string ko clear samjhte hai
----------------------------------------------------------------------
print(mystr[0:18])
rishabh is good bo

# 0:18 mai 0 include hota hai lekin 18 exclude hota hai yani ki is example mai 18th position ko nhi gina jayega
------------------------------------------------------------------
print(mystr[0:19])
rishabh is good boy
#isme 19 exclude hai mtlb 18th position tak gina jayega aur usme "rishabh is good boy" pur complete sentence aata hai
 -------------------------------------------------------------------------
print(mystr[0:19:2])
rsahi odby
#isme hm actually ek character ko skip kra rhe hai (skipping one character)
#:2 ka mtlb hai ki ek character chhod ke print kro agar :3 hota mtlb 2 character ko chhod ke print kro
# isliye ap dekh skte hai ki r ke baad i skip ho gya hai aur s hai , s ke baad h skip ho gya aur a hai and so on.....
------------------------------------------------------------------------------------------------
print(mystr[::])
rishabh is good boy
#ye ek dusra tarika hai string print karane ka , agar man lo apko number count krna nhi aata hai ya fir apko number count krna bahut alasya wala kaam lagta hai to ap is tarah bhi likh skte hai.
-----------------------------------------------------------------------------------------------------
print(mystr[::-1])
yob doog si hbahsir
#-1 basically string ko ulta kr deta hai ,to isme piche se character print hona start ho gye 
#dekhiye ye sb chije apko manually remember krni hogi
-------------------------------------------------------------------------------------
         String Methods

print(mystr.isalnum())
False
#isme hame output false mila hai , iska mtlb ye hai ki ye jo mystr string ye alpha numeric nhi hai mtlb is string ke andar space hai 
#ham dekh skte hai ki "rishabh" ke baad space hai fir "is" hai fir space hai..., to ye string ke andar space hai is liye hame false result mil raha hai
----------------------------------------------------------------------------------
rig="jaijavanjaikisan"
#yaha hamne ek dusri string li hai aur ab ham isme operation krenge 
-------------------------------------------------------------------------------
print(rig.isalnum())
True
#to ab hm dekh skte hai ki is string mai space nhi hai , isliye hame result true mil raha hai.
----------------------------------------------------------------------------------------------
print(rig.isalpha())
True
#is alpha check krta hai ki string purely alphabet hai ki nhi , aur hamari string purely alphabet hai isliye hame result true mila hai
-------------------------------------------------------------------------
print(mystr.endswith("boy"))
True
#mystr boy se end ho raha hai isliye it return true 
-----------------------------------------------------------------------------
print(mystr.count("b"))
2
#count function string ko count krne ke liye hai, mystr mai 2 b hai, isliye hame 2 return hua
-------------------------------------------------------------------------------
print(mystr.count("k"))
0
#0 "k" hai mystr mai
--------------------------------------------------------------------------
print(mystr.capitalize())
Rishabh is good boy
#capitalize function string ko capatilize kr deta hai, yani string ke pahle character ko capital letter mai convert kr deta hai.
------------------------------------------------------------------------------------------

pk="Ziddi hu MAI"
print(pk.lower())
ziddi hu mai
#convert to lower case
-----------------------------------------------------------------------------
sk="pagal hu mai"
print(sk.upper())
PAGAL HU MAI
#convert to upper case
--------------------------------------------------------------------------------
print(mystr.replace("good" , "bad"))
rishabh is bad boy
#as a name suggest replace function are used to replace the string
-----------------------------------------------------------------
Python mai kafi saare string function hai maine kuch hi mention kiye hai , ap python ki original documentaion mai jake check kr skte hai
https://docs.python.org/2/library/string.html

Bonus:----
MethodDescription
capitalize()Converts the first character to upper case
casefold()Converts string into lower case
center()Returns a centered string
count()Returns the number of times a specified value occurs in a string
encode()Returns an encoded version of the string
endswith()Returns true if the string ends with the specified value
expandtabs()Sets the tab size of the string
find()Searches the string for a specified value and returns the position of where it was found
format()Formats specified values in a string
format_map()Formats specified values in a string
index()Searches the string for a specified value and returns the position of where it was found
isalnum()Returns True if all characters in the string are alphanumeric
isalpha()Returns True if all characters in the string are in the alphabet
isdecimal()Returns True if all characters in the string are decimals
isdigit()Returns True if all characters in the string are digits
isidentifier()Returns True if the string is an identifier
islower()Returns True if all characters in the string are lower case
isnumeric()Returns True if all characters in the string are numeric
isprintable()Returns True if all characters in the string are printable
isspace()Returns True if all characters in the string are whitespaces
istitle()Returns True if the string follows the rules of a title
isupper()Returns True if all characters in the string are upper case
join()Joins the elements of an iterable to the end of the string
ljust()Returns a left justified version of the string
lower()Converts a string into lower case
lstrip()Returns a left trim version of the string
maketrans()Returns a translation table to be used in translations
partition()Returns a tuple where the string is parted into three parts
replace()Returns a string where a specified value is replaced with a specified value
rfind()Searches the string for a specified value and returns the last position of where it was found
rindex()Searches the string for a specified value and returns the last position of where it was found
rjust()Returns a right justified version of the string
rpartition()Returns a tuple where the string is parted into three parts
rsplit()Splits the string at the specified separator, and returns a list
rstrip()Returns a right trim version of the string
split()Splits the string at the specified separator, and returns a list
splitlines()Splits the string at line breaks and returns a list
startswith()Returns true if the string starts with the specified value
strip()Returns a trimmed version of the string
swapcase()Swaps cases, lower case becomes upper case and vice versa
title()Converts the first character of each word to upper case
translate()Returns a translated string
upper()Converts a string into upper case
zfill()Fills the string with a specified number of 0 values at the beginning
he

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