Slices

Slices of strings can be obtained by adding indexes between brackets after a string or any other iterable object.

Python indexes:

Start with zero.
Count from the end if they are negative.
Can be defined as sections, in the form [start: end + 1: step]. If not set the start, it will be considered as zero. If not set end + 1, it will be considered the size of the object. The step (between characters), if not set, is 1.

!!! TIP !!!: It is possible to invert strings by using a negative step:



In [3]:

    
p = "Manish"
print(p[0:2]) 
print(p[:2])
print(p[1:4])
print(p[-5:-2])









    



Ma
Ma
ani
ani



In [4]:

    
print (p[::-1])









    



hsinaM



In [ ]:

    
print("implemented"[::-2])
print("implemented"[-5::-2])
print("implemented"[:-7:-2])
print("implemented"[::2])
print("implemented"[1::2])
print("implemented"[1:4:2])



In [12]:

    
str1="hello"
print(str1[1:])
print(str1[-1:])
print(str1[-2:4])
print(str1[-4:-2])
print(str1[-1:2:-1])
print(str1[4])
# a b c d









    



ello
o
l
el
ol
o

?1 -> starts from i(m) and ends



In [11]:

    
x = 10
print(id(x))
x = "Mayank Johri"
print(x)
print("id(x)",id(x))
print("x[0:]", id(x[0:]))
print(id(x[1:]))
print(id(x[2:]))
print(x[0:])
print(x[1:])
print(x[2])

x = "God knows"
print(x)
print(id(x))
print(id(x[0]))
print(id(x[1]))
print(id(x[2]))
print(x[0])
print(x[1])
print(x[2])









    



139791751322304
Mayank Johri
id(x) 139791526564528
x[0:] 139791526564528
139791526658864
139791526658928
Mayank Johri
ayank Johri
y
God knows
139791526566640
139791731810800
139791729111088
139791732421216
G
o
d