An else statement contains the block of code that executes if the conditional expression in the if statement resolves to 0 or a FALSE value.. An else statement can be combined with an if statement. you can implement an if-else conditional but no elif inside a dict-comprehension (or any other comprehension). In very simple words, Nested if statements is an if statement inside another if statement. To learn more about dictionary, please visit Python Dictionary. Note: Core Python doesn’t support switch-case statements that are available in other programming languages but we can use the elif ladder instead of switch cases. The sequence of the check in the following order. Like List Comprehension, Python allows dictionary comprehensions.We can create dictionaries using simple expressions. The syntax of the if...else statement is −. Python allows us to stack any number of if statements inside the block of another if statements. Questions: This question already has an answer here: if/else in Python's list comprehension? In that case, you may use the IF, ELIF and ELSE in Python: Here, dictionary has a key:value pair enclosed within curly brackets {}. A dictionary comprehension takes the form {key: value for (key, value) in iterable}. Can we include the elif in our list comprehension, in a similar fashion to the code above? 3 answers Answers: >>> l = [22, 13, 45, 50, 98, 69, 43, 44, 1] >>> [x+1 if x >= 45 else x+5 for x in l] [27, 18, 46, 51, 99, 70, 48, 49, 6] Do-something if , else do-something else. Here, we have added nested if..elif..else inside the else block using ternary expression. Merge two dictionaries in a single expression in Python; I've seen some examples using tuples and dictionaries but they don't seem to return the same varialbe. If you need that, it would be better to drop the dict-comprehension - Ma0 @Ev.Kounis so the only way to do it is just avoid dict-comprehension? Example 2: IF, ELIF and ELSE in Python. dict['rest'] if len([dict[i] for i in dict if i==n] )==0 else [dict[i] for i in dict if i==n][0] Not only is it not Pythonic, it's inefficient. In Python, a dictionary is an unordered collection of items. Python Nested if statement. Dict comprehensions can use complex expressions and IF-ELSE constructs too. In Python, a nested dictionary is a dictionary inside a dictionary. Now let’s add another layer. The ternary form of the if/else operator doesn’t have an ‘elif’ built in, but you can simulate it in the ‘else’ condition: ['yes' if v == 1 else 'no' if v == 2 else 'idle' for v in l] This is like saying: For example, an answer like: ['yes', 'no', 'idle', 'idle', 'idle'] Up until now, I have only used if and else in list comprehension. Specifically, let’s say that you want to include another discount group – the ‘Junior Discount’ group – for people who are below the age of 18.. 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