Writing tuple values to a file
<p>I have a piece of code</p>

<pre><code># create list of (val, key) tuple pairs
freq_list2 = [(val, key) for key, val in freq_dic.items()]
# sort by val or frequency
freq_list2.sort(reverse=True)
freq_list3 = list(freq_list2)
# display result as top 10 most frequent words
for freq, word in freq_list2:
    print word, freq
freq_list4 =[]
freq_list4=freq_list3[:10]

print freq_list4

f = open("wordfreq.txt", "w")
f.write( str(freq_list4) )
f.close()

output_filename = 'wordfreq.arff'
with open(output_filename,"w") as fp:
        fp.write('''@RELATION wordfrequency

@ATTRIBUTE word string
@ATTRIBUTE frequency numeric

@DATA
''')
</code></pre>

<p>Essentially I am trying to feed the values from key and val so that @data looks like:</p>

<pre><code>@data
word1, 21
word2, 17
</code></pre>

<p>I'm not very good with this particular area, so any help would really be appreciated.</p>
