Strange error: Inflate GZip String in Ruby

The line

test = Zlib::Inflate.inflate(inputstring)

Gives me NameError: uninitialized constant Tk::Butto开发者_Go百科n::Inflate

I'm using Tk for the interface, but if I uncomment this line everything works fine (test isn't used elsewhere)

(Source for code below http://corelib.rubyonrails.org/classes/Zlib/Inflate.html )

def inflate(string)
zstream = Zlib::Inflate.new
buf = zstream.inflate(string)
zstream.finish
zstream.close
buf
end

newString = inflate(inputstring)

also gives me also a similar/same NameError

P.S. Edits are strange... (had to make more changes)

---

Did you require 'zlib' at the beginning of your file?

Ruby is looking for the Inflate constant in the Tk::Button namespace, you can force it to look at the root with:

test = ::Zlib::Inflate.inflate(inputstring)