Python filterd list comprehensions is defined as:
[ function_with_ee_as_parameters for each_element_in_sequence(ee) in sequence if ee_is_true_in_expression ]
In this tutorial, we will discuss how to use python filtered list comprehensions correctly.
Process of filterd list comprehensions execution
1.Run for in
for each_element_in_sequence(ee) in sequence
Iterating each element in sequence.
2.Check each element is true or not in expression
if ee_is_true_in_expression
You can create an expression in if statement for each element in squence.
3.Run function_with_ee_as_parameters
if ee_is_true_in_expression is true, then we will use this ee as a parameter to run function_with_ee_as_parameters.
4.Use the return value of function_with_ee_as_parameters to create a new list
Here is an example.
list = [1, 2, 3, 4, 5]
def d(x):
return 2 * x
x = [d(e) for e in list if e % 2 == 0]
print(x)
First, we will iterate each integer in python list.
Second, Check each integer in python list is e % 2 == 0
Third, if e % 2 == 0, we will pass e as a parameter into d(x) function
Third, we will use the return value of d(x) to create a new python list.
The new python list is:
[4, 8]