Python: else

Now let's modify the function from the previous lesson so that it returns the whole string Normal sentence or Question instead of just the sentence type:

def get_type_of_sentence(sentence):
    last_char = sentence[-1]

    if last_char == '?':
        sentence_type = 'question'
    else:
        sentence_type = 'normal'

    return "Sentence is " + sentence_type

print(get_type_of_sentence('Hodor'))   # => 'Sentence is normal'
print(get_type_of_sentence('Hodor?'))  # => 'Sentence is question'

We added else and a new block. It'll execute if the condition in if is false. You can also put other if conditions in the else block.

`if-else' constructions can be arranged in two ways. Negation allows you to change the order of the blocks:

def get_type_of_sentence(sentence):
    last_char = sentence[-1]

    if last_char != '?':
        sentence_type = 'normal'
    else:
        sentence_type = 'question'

    return "Sentence is " + sentence_type

To make it easier, try choosing non-negative checks and adjust the contents of the blocks to suit it.

Instructions

Implement a function called normalize_url() function, which normalizes data. It takes a site address and returns it with https:// at the beginning.

The function accepts addresses as ADDRESS or http://ADDRESS, but always returns the address as https://ADDRESS. You can also pass fully normalized data, e.g., https://ADDRESS, in which case you don't need to change anything.

Call examples:

print(normalize_url('https://yahoo.com/'))  # => 'https://yahoo.com/'
print(normalize_url('google.com'))     # => 'https://google.com'
print(normalize_url('http://ai.fi'))   # => 'https://ai.fi'

There are several ways to do this task. One of them is to compare the first 7 characters of the argument string with the string http:// and then decide whether to http:// or not based on that.

You'll also most likely need to discard the unnecessary part at the beginning of the string. Remember when we looked at the way to get part of a string using string slices? If not, here's a quick reminder

# Take 6 characters from the beginning
print('Winterfell'[:6])  # => 'Winter'

So, with slicing, you can also discard a certain number of characters:

# Discard the first 6 characters
print('Winterfell'[6:])  # => 'fell'

Definitions

• else a way to specify the block of code that'll be executed if an if condition is not satisfied.