PYTHON

python list slicing

thislist = ["1.apple", "2.banana", "3.cherry", "4.orange", "5.kiwi", "6.melon", "7.mango"]

# thislist[starting index(including) : end index(not including):step]

print(thislist[:]) #Output: ['1.apple', '2.banana', '3.cherry', '4.orange', '5.kiwi', '6.melon', '7.mango']
print(thislist[1:]) #Output: ['2.banana', '3.cherry', '4.orange', '5.kiwi', '6.melon', '7.mango']
print(thislist[:5]) #Output: ['1.apple', '2.banana', '3.cherry', '4.orange', '5.kiwi']
print(thislist[2:5]) #Output: ['3.cherry', '4.orange', '5.kiwi']
print(thislist[::3]) #Output: ['1.apple', '4.orange', '7.mango']
print(thislist[1::2]) #Output: ['2.banana', '4.orange', '6.melon']
print(thislist[1:6:3]) #Output: ['2.banana', '5.kiwi']

slicing in python listing

list_example = ["python","ruby","java","javascript","c#","css","html"]
print(list_example[3])#javascript
print(list_example[0])#python
print(list_example[6])#html
print(list_example[0:3]) #will print the programming language under python and javascript
print(list_example[:3]) all languages under python to javascript

List Slicing in Python

# List slicing in Python

my_list = ['p','r','o','g','r','a','m','i','z']

# elements from index 2 to index 4
print(my_list[2:5])

# elements from index 5 to end
print(my_list[5:])

# elements beginning to end
print(my_list[:])

list slicing in python

# List slicing
friends = ["Harry", "Tom", "Rohan", "Sam", "Divya", 45]
print(friends[0:4])
print(friends[-4:])

python slicing

#slicig
b=("hello world")
print(b[2:])

array slicing python

#slicing arrays:
#generic sampling is done by 
#arr[start:end] -> where start is the starting index and end is ending idx
>>> import numpy as np
>>> arr = np.array([1,2,3,4,5])
>>> print(arr[1:5]) #starting idx 1 to ending index 4
[2 3 4 5]#it will print from starting idx to ending idx-1

#if you leave the ending index blank it will print all 
#from the starting index till end
>>> arr = np.array([2,6,1,7,5])
>>> print(arr[3:])
[7 5]
>>> print(arr[:3]) #if you leave the starting index blank it will print from 0 index to the ending idx-1
[2 6 1]
>>> print(arr[:])
[2 6 1 7 5]
#leaving both the index open will print the entire array.

##########STEP slicing########
#if you want to traverse by taking steps more than 1 
#we use step slicing in that case
#syntax for step slicing is : arr[start:end:step]
>>> arr = np.array([2,6,1,7,5,10,43,21,100,29])
>>> print(arr[1:8:2])#we have taken steps of two
[ 6  7 10 21]


 
  
 

python slicing a list

finishers = ['sam', 'bob', 'ada', 'bea']
first_two = finishers[:2]

slicing in python list

a = [1,2,3,4,5]
a[m:n] # elements grrater than equal to m and less than n
a[1:3] = [2,3]

list slice in Python

# List slicing in Python

my_list = ['p','r','o','g','r','a','m','i','z']

# elements from index 2 to index 4
print(my_list[2:5])

# elements from index 5 to end
print(my_list[5:])

# elements beginning to end
print(my_list[:])

#['o', 'g', 'r']
#['a', 'm', 'i', 'z']
#['p', 'r', 'o', 'g', 'r', 'a', 'm', 'i', 'z']

How to Slice list

# Python program to demonstrate
# Removal of elements in a List
 
# Creating a List
List = ['S','O','F','T','H','U',
        'N','T','.','N','E','T']
print("Initial List: ")
print(List)
 
# Print elements of a range
# using Slice operation
Sliced_List = List[3:8]
print("
Slicing elements in a range 3-8: ")
print(Sliced_List)
 
# Print elements from a
# pre-defined point to end
Sliced_List = List[5:]
print("
Elements sliced from 5th "
      "element till the end: ")
print(Sliced_List)
 
# Printing elements from
# beginning till end
Sliced_List = List[:]
print("
Printing all elements using slice operation: ")
print(Sliced_List)

list slicing in python

ing in python listPython By Cruel Capuchin on Jun 29 2020
a = [1,2,3,4,5]
a[m:n] # elements grrater than equal to m and less than n
a[1:3] = [2,3]

List Slicing

This slice object can take three arguments; 
slice(start, end, step)

fruits = ["apple", "banana", "peach", "pear", "plum", "orange"]
x = slice(1, 4, 2)
fruits[x]

Python Slicing

# Accessing tuple elements using slicing
my_tuple = ('p','r','o','g','r','a','m','i','z')

# elements 2nd to 4th
# Output: ('r', 'o', 'g')
print(my_tuple[1:4])

# elements beginning to 2nd
# Output: ('p', 'r')
print(my_tuple[:-7])

# elements 8th to end
# Output: ('i', 'z')
print(my_tuple[7:])

# elements beginning to end
# Output: ('p', 'r', 'o', 'g', 'r', 'a', 'm', 'i', 'z')
print(my_tuple[:])

python slice list

my_list = [1, 2, 3, 4, 5]

print(my_list[:])

python list slicing array

next(e for e in mylist if isinstance(e, str))[:1]