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# Please can you help me with this python challenge

This challenge says where is sillycase() as an error message. please can someone tell me what's wrong.

silly.py
```# The first half of the string, rounded with round(), should be lowercased.
# The second half should be uppercased.
# E.g. "Treehouse" should come back as "treeHOUSE"
def sillycase (Treehouse):
leng = (len(Treehouse) / 2)
first = silly[:leng].round()
second = silly[leng:]()
return first + second
```

Hi Andy,

That's a really good attempt! You understand the general solution. We just need to fix some syntax and relocate the `round()` function.

First, let's tackle `round()`. Without it, when calling `len()` on a string with an odd number of letters, it will return a floating point value.

```len("apple") / 2

# equals 2.5

# In order to round this value, we can put this expression
# inside the round function.

round(len("apple") / 2)

# equals 2

# Your variable is called leng, but really it's holding half the length.
# Perhaps consider renaming it to half.
```

Next up is slicing the string. Your code is trying to slice a string inside a undefined variable `silly`. Your method is accepting a variable called `Treehouse`, so you can either change the variable name being sliced to `Treehouse` or change the parameter of the method to `silly` - either way will work.

Finally, change the first half of the string to lowercase and the last half to uppercase.

```"apple".upper()  # equals "APPLE"
"TOMATO".lower()  # equals "tomato"

# we can chain methods after slicing like this
Treehouse[:half].lower()

# the string inside the variable name Treehouse will be sliced from index 0
# up to but excluding index half and then lowercased.
```

Hope this helps,

Cheers

Hi thankyou for the good feedback and help. It passed I did it a bit different I just needed the round function in the leng variable.