Python: Convert contents of a file to Uppercase characters only
<p>I am trying to convert the contents a set of files to only uppercase characters. Heres the code I have so far:</p>

<pre><code>import os

def test():
    os.chdir("C:/Users/David/Files")
    files = os.listdir(".")
    for x in files:
        inputFile = open(x, "r")
        content = inputFile.read()
        with open(x, "wb") as outputFile:
                str.upper(content)
</code></pre>

<p>When I run it all it does it delete the content of the file.</p>
