> for line in all_kbd:
> if line.string == None:
I modified your code slightly:
for line in all_kbd:
print(line)
sys.exit()
if line.string == None:
Running the new script yields:
$ python shibly.py
<kbd class="command">
cp -v --remove-destination /usr/share/zoneinfo/
<em class="replaceable"><code><xxx></xxx></code></em>
\
/etc/localtime
</kbd>
Meaning that
all_kbd=soup.find_all('kbd')
yields only a single string, not multiple strings as I'm guessing you expected.
You might also consider running your program as:
python -m pdb your_program.py
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