Here are the examples to create and basic in-built functions to handle and alter the array:
array_name =  #to declare an empty array
array_1 = [ '2', '3', '4', '7', '9'] #to declare an array with numericals
print( "First Element:", array_1 ) #returns the first element of an array
print( "Last Element:", array_1 [-1]) #returns the last element of an array
print( "Length of the array:", len(array_1)) #returns length of an array
Array is mutable i.e. can modify after declaring variable. There are a lot of in-built libraries like append(), insert(), etc. to alter the array.
You can go through this Python Tutorial to learn more about Arrays and in-built functions to handle arrays.