Python List

MI Shajib — Sat, 12 Sep 2020 20:14:21 +0000
# Author - MI SHAJIB

# Python List / or any other language called by array

bazar = ["alu", "potol", "morich"]

print(bazar)

# List item update / replace

print(bazar[0])

bazar[0] = "fish"

print(bazar)
# we can change any item using negative index example

print(bazar[-1])

bazar[-1] = "cucumber"

print(bazar)

# bazar[3] = "cream"  # It will give list assignment error (list assignment index out of range) That's why we use append() method of python

# print(bazar)


# Add / Append new item with append() method. append() method add item end of the list
bazar.append("cream")
print(bazar)

# If we want to add new item using index number then we can use insert() method
bazar.insert(0, "oil")
print(bazar)

# we can also add two list
bazar2 = ['mango', "salt", "spray"]

print(bazar2)

final_bazar_list = bazar2 + bazar

print(final_bazar_list)

print('\n \n \n \n')


# Remove list item using del keyword
del final_bazar_list[2]  # Here we want to delete 2 index item / spray
print(final_bazar_list)  # Successfully delete the given item

print('\n \n \n')

# Remove list item using remove() method
final_bazar_list.remove('potol')  # Here we want to remove potol
print(final_bazar_list)  # Successfully removed item

print('\n \n \n')


# If we want to remove end item of the list then we can use pop() method. Also we can store removed item by using this pop() method
# Here we can remove last item and store the removed item into variable
removed_item = final_bazar_list.pop()
print(final_bazar_list)
print(removed_item)

print('\n \n \n')

# We can also define empty list
empty_list = []
print(empty_list)

print('\n \n \n')


# we can also convert string into list
string = "shajib, zihan, akter"
string_list = string.split(',')
print(string_list)
print(type(string_list))

# we can also split string by space
string2 = "polash, fahad, akter"
string_list2 = string2.split(' ')
print(string_list2)
print(type(string_list2))

print('\n \n \n')

# We can find length of list by len() method
print(final_bazar_list)
print(len(final_bazar_list))
print('\n \n \n')


# We can append multiple item at a time by extend() method
final_bazar_list.extend(['ada', 'lebu'])
print(final_bazar_list)
print('\n \n \n')

# List Reversing
final_bazar_list.reverse()
print(final_bazar_list)
print('\n \n \n')

# List Soring
final_bazar_list.sort()
print(final_bazar_list)
print('\n \n \n')

# We can also define list into list or multidimensional list
multi_list = [['a', 'b', 'c'], [1, 2, 3, 4], 'x', 'y', 'z']
print(multi_list)
print(len(multi_list))

# Access multidimensional list
print(multi_list[0])
print(multi_list[0][2])

print(multi_list[1])
print(multi_list[1][3])

print(multi_list[4])
PHP Input Sanitization

MI Shajib — Sat, 12 Sep 2020 20:11:05 +0000
DEV Community: MI Shajib

Python List

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