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# Why is this message coming?

I really don`t know why this message always pops up i cant find an error please help me

lists.py
```the_list = ["a", 2, 3, 1, False, [1, 2, 3]]

# Your code goes below here
num1 = the_list.pop(3)
the_list.insert(0, num1)

the_list.remove("a")
del the_list[3]
del the_list[3]

x = 20

for i in x:
if not i in my_list:
the_list.append(i)
i = i + 1
else:
i = i + 1
continue
```

Hi Tobias,

I think you are overcomplicating Task 3. The challenge specifically asks you to use `.extend()` so it's possible to pass this using one line of code.

But there are obviously many different ways to solve a problem and using a `for` loop like you are attempting is perfectly reasonable. You are on the right track, so I will comment on it anyways just to clear a few things up.

First, you have your "x" variable defined as a single integer. If you want to cycle through the numbers 1 to 20 using a `for` loop, you need to create a list of that range of numbers.

Second, your `if` statement has a typo. You are checking "my_list" when it should be "the_list"

And third, it is not necessary to increment your "i" variable as you are doing. The `for` loop will cycle through each item in "x" on its own. If you were using a `while` loop to solve this challenge then a counter variable like "i" would be useful.

So your code for task 3 could be reduced to the following:

```x = list(range(1, 21))

for i in x:
if not i in the_list:
the_list.append(i)
```

Hope this helps.