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thanks for the reply - it worked. I just want to make sure that I
understand the general syntax - when can I use the iteration variable
as x (e..g. print x), and when do I need to use the ...%s... %x syntax?
is it only when I need to call x as a "string"?<br>
<br>
I am not sure I am asking the question right or using the right terms
as I am fairly new to programing and python.<br>
<br>
Thanks for your time.<br>
Ben<br>
<br>
Brian Blais wrote:
<blockquote cite="mid:90B098E8-F2F7-41A9-8B22-A09AB3053696@bryant.edu"
type="cite">
<div>
<div>On Jul 8, 2008, at Jul 8:8:08 PM, Ben Keshet wrote:</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">
<div style="margin: 0px;"><span class="Apple-style-span" style="">I
want to use a 'for' iteration to manipulate files in a set of folders,
something like:</span></div>
<div style="margin: 0px; min-height: 14px;"><br>
</div>
<div style="margin: 0px;">folders= ['1A28','1A6W','56Y7']</div>
<div style="margin: 0px;">for x in folders:</div>
<div style="margin: 0px;"><span class="Apple-converted-space"> </span>print
x <span class="Apple-converted-space"> </span># print the current
folder</div>
<div style="margin: 0px;"><span class="Apple-converted-space"> </span>f
= open('my/path/way/x/my_file.txt', 'r')</div>
<div style="margin: 0px;"><span class="Apple-converted-space"> </span>...</div>
<div style="margin: 0px; min-height: 14px;"><br>
</div>
</blockquote>
<div><br>
</div>
<div><br>
</div>
<div>I think:</div>
<div><br>
</div>
<div>f = open('my/path/way/%s/my_file.txt' % x, 'r')</div>
<div><br>
</div>
<div>should work, although I would probably be more clear about the
names, like:</div>
<div><br>
</div>
<div>folders=['1A28','1A6W','56Y7']</div>
<div>for folder in folders:</div>
<div> filename='my/path/way/%s/my_file.txt' % x</div>
<div> fid=open(filename,'r')</div>
<div> ....</div>
<div><br>
</div>
<div>also, make sure that you do mean the relative path
my/path/way/... # in current folder</div>
<div>as opposed to the absolute path: /my/path/way
# in root folder</div>
<div><br>
</div>
<div><br>
</div>
<div><span class="Apple-tab-span" style="white-space: pre;"> </span>bb<br>
</div>
<div>-- </div>
</div>
<div><span class="Apple-style-span"
style="border-collapse: separate; border-spacing: 0px; color: rgb(0, 0, 0); font-family: Monaco; font-size: 13px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; text-indent: 0px; text-transform: none; orphans: 2; white-space: normal; widows: 2; word-spacing: 0px;">
<div>Brian Blais</div>
<div><a moz-do-not-send="true" href="mailto:bblais@bryant.edu">bblais@bryant.edu</a></div>
<div><a moz-do-not-send="true" href="http://web.bryant.edu/%7Ebblais">http://web.bryant.edu/~bblais</a></div>
<div><br class="khtml-block-placeholder">
</div>
<br class="Apple-interchange-newline">
</span> </div>
<br>
</blockquote>
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