What you said…
no else? => if after for
else? => if and else before for
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Noted, thank you! Didn’t expect an answer so soon. 
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hey everyone,
I know this must be old topic for you but I am having trouble with loops so i wanted to ahead ask about the can_ride_coaster code. Can somebody explain to me where my code went wrong and how i may fix with this if /else statement ? So basically I can get the list printed but not append it to can_ride_coaster
Thanks very much!
can_ride_coaster =
for height in heights:
if height < 161:
continue
else:
new_list = print(height)
new_list.append(can_ride_coaster)
That is the new list to which those eligible rider heights will be appended.
can_ride_coaster.append(height)
Work with that hint and see if you can modify your code to suit.
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I believe your confusion is because the example provided in the lesson uses very similar temporary and list variable.
usernames = [word for word in words if word[0] == '@']
I have just modified the above one in the following way… May I know why is it showing error:
divbythree = [ x for x in range(1,20) if x % 3 == 0 print(“yes”)
else print(“No”) ]
print(divbythree)
Like a normal if statement you need a valid expression following if. Your code would be like writing the following which is not valid syntax.
if x % 3 == 0 print("yes"):
I’d advise against adding side effects like printing to stdout within a list comprehension in general even in cases where you can get away with it. Stick with a for loop for that kind of thing, it’s just not what comprehensions are for.
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3 posts were merged into an existing topic: FAQ: Function Arguments: *args and **kwargs - Variable number of arguments: *args
Hello,
Can someone explain why the following is incorrect?
Is it because “if” is what only accepts inequalities in Python?
can_ride_coaster = [tall for tall > 161 in heights]
Hello,
Can someone explain why the following is incorrect?
Is it because “if” is what only accepts inequalities in Python?
can_ride_coaster = [tall for tall > 161 in heights]
can_ride_coaster = tall for tall _________ what was the original list? it was ‘heights’ and we need to say ‘in’ since its a loop
_________> 161 in heights Yeah we need an if logic here, but what should be > 161? use your tall variable
So it would be like…
can_ride_coaster = [tall for tall in heights if tall > 161 ]
And then you want to print it.
print (can_ride_coaster)
The above will give a syntax error, so cannot be written that way.
You are correct that it would be,
... [tall for tall in heights if tall > 161]