رشته ها در پایتون (python)

متد capitalize

متد count

>>> str1 = 'this is a sample string'

>>> str1.capitalize ()

'This is a sample string'

>>> str2 = strl.capitalize()

>>> str2

'This is a sample string'

>>> str2.count( 't')

1.

>>> str2.count('is')

2

>>> str2・count( ' is ' )

1.

>>> str2.count('t' , 0, 8)

O

 متد find و عملگر in

>>> str2.find(' is ' [O:4])

4

>>> str2.find('is' [O:4])

2

>>> str2.find('python')

-1

  

>>> 'Py' in 'python'

True

>>> 'sample' not in str1

False

متد islower

>>>  Str1. isupper ( ) 
False 
>>>  Str1. islower () 
True 
>>>  Str2. islower ()
False

متد title

>>> strl.title()

'This Is A Sample String'

متد strip

در پایتون کاراکتر space به عنوان یک کاراکتر به حساب می آید. برای حذف spaceهای اضافی در رشته می توان از تابع strip استفاده کرد. تابع lstrip()، spaceهای اضافی را از سمت چپ رشته حذف می کند و تابع rstrip()، spaceهای اضافی موجود در سمت راست رشته را حذف می کند. این تابع به خصوص برای خواندن فایل ها بسیار مفید است.

>>> str3 = '     five tabs of the SPACEBAR     '

>>> str3.lstrip()

'five tabs of the SPACEBAR     '

>>> str3.rstrip()

'     five tabs of the SPACEBAR'

>>> str3.strip()

'five tabs of the SPACEBAR'

>>> 

متد replace

>>> strl

'this is a sample string'

>>> strl.replace('sample', 'test')

'this is a test string'

متد split

>>> str4 = '1, 2,,4, 5'

>>> str4.split(',')

['1', '2', '', '4', '5']

متد join

>>> days = ['Monday','Tuesday','Wednesday']

>>> week = ' '.join(days)

>>> week

'Monday Tuesday Wednesday'

فرمت دهی رشته ها در پایتون (python)

>>> s = '%s has %d vacation days left'% ('Tim', 15)

>>> s

'Tim has 15 vacation days left'

>>> s1 = "{O} has {1} vacation days left".format('Tim', 15)

>>> s1

'Tim has 15 vacation days left'

>>> c = “No %s for %s !” %('soup', 'you')

>>> C

'No soup for you !'

>>> r = 'food'

>>> d = 'child'

>>> C = "No %s for %s !" %(r, d)

>>> C

NC food for child

>>> a = '{0}, {1}, and {2}'.format('this', 'that', 'those')

>>> a

'this, that, and those'

>>> a = '{2}, {1}, and {0}'.format('this', 'that', 'those')

>>> a

'those, that, and this'

>>> a = 'this {1} can {2}'.format('baby', 'walk')



Traceback (most recent call last):

  File "", line 1, in 

       a = 'this {1} can {2}'.format('baby', 'walk')

Index Error : tuple index out of range

>>> b = 'this {0} can {1}'.format('baby', 'walk')

>>> b

'this baby can walk'

python2.x                    python3.x

raw_input()   --------------> input()               
input()  -------------------> eval(input())   

>>> A=input("Please Enter Your Age:")

Please Enter Your Age: 23

>>> type(A)



>>> A=input("Please Enter Your Name:\n")

Please Enter Your Name:

Tim

Traceback (most recent call last):

   File "", line 1, in 

       A=input("Please Enter Your Name:\n")

   File "", line 1, in 

NameError: name 'Tim' is not defined

>>> A=input ("Please Enter Your Name: \n")

Please Enter Your Name:

'Tim'

>>> type(A)



>>> bottles = raw_input("Daily water consumption: ")

Daily water consumption: 20

>>> type(bottles)

<type str'="">

>>> bottles = input("Daily water consumption: ")

Daily water consumption: 20

>>> type(bottles)



>>> bottles = int (raw_input("Daily water consumption: "))

Daily water consumption: 30

>>> type(bottles)