Case insensitive dictionary
<p>I'd like my dictionary to be case insensitive.</p>

<p>I have this example code:</p>

<pre><code>text = "practice changing the color"

words = {'color': 'colour',
        'practice': 'practise'}

def replace(words,text):

    keys = words.keys()

    for i in keys:
        text= text.replace(i ,words[i])
    return  text

text = replace(words,text)

print text
</code></pre>

<p>Output = practise changing the colour</p>

<p>I'd like another string "<strong>practice changing the Color</strong>" (where 'Color' starts with a capital) to also give the same output.</p>

<p>I believe there is a general way to convert to lowercase using
<code>mydictionary[key.lower()]</code> but I'm not sure how to best integrate this into my existing code. (If this would be a reasonable, simple approach anyway)</p>

<p>Could anyone help me please?</p>

<p>thanks</p>
