python create empty list code example

Example 1: python initialize list length n

Creating an empty list:

>>> l = [None] * 10
>>> l
[None, None, None, None, None, None, None, None, None, None]

Example 2: create a list of a certain length python

# 2.X only. Use list(range(10)) in 3.X.
>>> l = range(10)
>>> l
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]

Example 3: python remove empty list

list2 = filter(None, list1)

Example 4: python list empty

my_list = list()
# Check if a list is empty by its length
if len(my_list) == 0:
    pass  # the list is empty
# Check if a list is empty by direct comparison (only works for lists)
if my_list == []:
    pass  # the list is empty
# Check if a list is empty by its type flexibility **preferred method**
if not my_list:
    pass  # the list is empty

Example 5: py create empty list

# declare list 
a = []          
  
print("Values of a:", a) 
print("Type of a:  ", type(a)) 
print("Size of a:  ", len(a))      

# Output:
# > Values of a: []
# > Type of a:   <class 'list'>
# > Size of a:   0

Example 6: empty list in python

# Python program to declare 
# empty list 

# list is declared 
a = []