notes

clear breadcrumbs

list

import os

os.system('clear')

lst = ['a','b','c']

for item in lst:
    print(item)
# a
# b
# c

print(lst) # ['a', 'b', 'c']
           #   0    1    2    3

# index range (including lower bound, but not including upper bound of range)
print(lst[0:3]) # ['a', 'b', 'c']
print(lst[:3])  # ['a', 'b', 'c']
print(lst[2:])  # ['c', 'd']

last = lst.pop() 
print(last) # d
print(lst) # ['a', 'b', 'c']

print(lst[-1]) # c

del lst[1]
print(lst) # ['a', 'c', 'd']

# index range
print(lst[1:3])

# appending to the end of the list
lst.append('b')
lst.append('c')

print(lst) # ['a', 'b', 'c']

# insert(index, value)
lst.insert(0,'A')
print(lst) # ['A', 'a', 'b', 'c']

# list_1.extend(list_2) append contents of list_2 to list_1
lst_2 = ['d','e','f']
lst.extend(lst_2)
print(lst) # ['A', 'a', 'b', 'c', 'd', 'e', 'f']

lst.remove('A')
print(lst) # [a', 'b', 'c', 'd', 'e', 'f']

lst.pop()
print(lst) # ['a', 'b', 'c', 'd', 'e']

import os

# os.system('clear')

lst = ['a','b','c']

for item in lst:
    print(item)
# a
# b
# c

print(lst) # ['a', 'b', 'c']
           #   0    1    2    3

# index range (including lower bound, but not including upper bound of range)
print(lst[0:3]) # ['a', 'b', 'c']
print(lst[:3])  # ['a', 'b', 'c']
print(lst[2:])  # ['c', 'd']

last = lst.pop() 
print(last) # d
print(lst) # ['a', 'b', 'c']

print(lst[-1]) # c

del lst[1]
print(lst) # ['a', 'c', 'd']

# index range
print(lst[1:3])

# appending to the end of the list
lst.append('b')
lst.append('c')

print(lst) # ['a', 'b', 'c']

# insert(index, value)
lst.insert(0,'A')
print(lst) # ['A', 'a', 'b', 'c']

# list_1.extend(list_2) append contents of list_2 to list_1
lst_2 = ['d','e','f']
lst.extend(lst_2)
print(lst) # ['A', 'a', 'b', 'c', 'd', 'e', 'f']

lst.remove('A')
print(lst) # [a', 'b', 'c', 'd', 'e', 'f']

lst.pop()
print(lst) # ['a', 'b', 'c', 'd', 'e']

lst.reverse()
print(lst) # ['e', 'd', 'c', 'b', 'a']

print(lst) # ['a', 'b', 'c', 'd', 'e']

lst_3 = [7,3,9,1]

lst_3.sort()  
print(lst_3) # [1, 3, 7, 9]

lst_3.sort(reverse=True)
print(lst_3) # [9, 7, 3, 1]

lst_4 = sorted(lst_3)
print('original list' + str(lst_3)) # original list[9, 7, 3, 1]
print('new list sorted' + str(lst_4)) # new list sorted[1, 3, 7, 9]