Code sample for working with lists in python. Reference: https://docs.python.org/2/tutorial/introduction.html#lists

python_lists_basic_examples.py

# create a list
squares = [1, 4, 9, 16, 25]

# indexing
squares[0] # it is zero-based index
squares[-1]

# slicing
squares[0:2] # [inclusive, exclusive], first and second element
squares[-2:] # last two elements

# Create a shallow copy of a list object
squares[:] # Check (https://docs.python.org/2/library/copy.html)

# concatenation
squares + [36, 49, 64, 81, 100]

# lists are mutable
cubes = [1, 8, 27, 65, 125]  # something's wrong here
cubes[3] = 64  # replace the wrong value

# append values at the end
cubes.append(216)

# assignments to slices
letters = ['a', 'b', 'c', 'd', 'e', 'f', 'g']
letters[2:5] = ['C', 'D', 'E'] # replace some values
letters[2:5] = [] # now remove them
letters[:] = [] # clear the list by replacing all the elements with an empty list

# compute the size of a list
len(squares)

# nested lists
a = ['a', 'b', 'c']
n = [1, 2, 3]
x = [a, n] # [['a', 'b', 'c'], [1, 2, 3]]
x[0] # ['a', 'b', 'c']
x[0][1] # 'b'