Lists are data structures that can host a various elements of different datatypes. Below, you will find the syntax for storing, accessing and modifying data that is stored in the format of a list.
List with the same datatype:
In this example we define a list and access its elements by using their numerical position indicator.
refers to the second element (this is because python using zero-based numbering).
list = [2, 4, 7, 9] print ("list is:",list) print('element number 2 is:',list)
List with different datatypes:
We define an array with multiple datatypes then access each element separately. The syntax is nearly identical, except for strings being contained in a pair of quotes.
array2 = [3, "test", True, 7.4] print ("list2 is:",array2) print('element 1 is',array2, 'which is an integer') print('element 2 is',array2, 'which is a string') print('element 3 is',array2, 'which is a Boolean') print('element 4 is',array2, 'which is a float')
Lists defined with the range function:
The range function can be used to define a list. The syntax of range is
range(start, finish, increment) If the starting point is not defined, 0 is taken as the default. If the increments are not specified, the default is units of one. The endpoint must be provided.
a = range(5) #a = [0,1,2,3,4] print ("a:",a) print(a)
a = range(10,0,-2) #a = [10,8,6,4,2] print ("a is now:",a) print (a)
Modifying elements in an array:
Using the append and pop functions, elements can be added and removed, respectively.
a= print ("a is now:",a) a.append("test") print ("a is now:",a) a.append(5) print ("a is now:",a) a.pop() print ("a is now:",a) a.append(3) a.append(5) print ("a is finally and mixed:",a)