discuss: flowcharts
Subject:
Re: Flowcharts
From:
Alex Nordstrom ####@####.####
Date:
10 Apr 2005 03:49:54 -0000
Message-Id: <200504101149.47418.lx@se.linux.org>
On Sun, 10 Apr 2005 07:29, Jaqui Greenlees wrote:
> the alternative method to reduce file size is reduce dpi levels.
> an image of 120 by 90 at 120 dpi is larger than 120 by 90 at 72 dpi.
>
> quality reduction doing this, but for web graphics the trade is
> quality for download speed / file size. ( as you know )
DPI is only a derived measurement expressing the pixel size divided by
the print size. It has no direct relevance to raster images displayed
on the screen.
An image 100 pixels wide printed at 100 DPI will be one inch (2.54 cm)
wide. An image 100 pixels wide printed at 72 DPI will be
100/72=1.39" (3.53 cm) wide. Regardless, 100 pixels will always require
the same amount of memory.
In other words, if you are setting the image size in terms of pixels
(dots), then the number of dots (pixels) per inch only matters if you
intend for the image to have a specific physical size.
--
Alex Nordstrom
http://lx.n3.net/
Please do not CC me in followups;
I am subscribed to the tldp discussion list.
--> -->
<type 'exceptions.IOError'> | Python 2.5.2: /usr/bin/python
Fri Jul 5 19:37:12 2024 |
A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.
| /opt/ezmlm-browse-0.20/main.py in main() |
424
|
425 if path is not None:
|
426 main_path(path)
|
427 else:
|
428 main_form()
|
| global main_form = <function main_form at 0x87e2c6c> |
| /opt/ezmlm-browse-0.20/main.py in main_form() |
378 except ImportError:
|
379 die(ctxt, "Invalid command")
|
380 module.do(ctxt)
|
381
|
382 def main():
|
| module = <module 'commands.showmsg' from '/opt/ezmlm-browse-0.20/commands/showmsg.pyc'>, module.do = <function do at 0x87ec5a4>, global ctxt = {'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'} |
| /opt/ezmlm-browse-0.20/commands/showmsg.py in do(ctxt={'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}) |
18 write(html('msg-pager') % ctxt)
|
19 write('<hr>')
|
20 sub_showmsg(ctxt, ctxt[MSGNUM])
|
21 write('<hr>')
|
22 write(html('msg-pager') % ctxt)
|
| global sub_showmsg = <function sub_showmsg at 0x87e21ec>, ctxt = {'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, global MSGNUM = 'msgnum' |
| /opt/ezmlm-browse-0.20/globalfns.py in sub_showmsg(ctxt={'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, msgnum=9239) |
229 format_timestamp(ctxt, ctxt)
|
230 write(html('msg-header') % ctxt)
|
231 rec_showpart(ctxt, msg, 0)
|
232 write(html('msg-footer') % ctxt)
|
233 ctxt.pop()
|
| global rec_showpart = <function rec_showpart at 0x87e21b4>, ctxt = {'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, msg = <email.message.Message instance at 0x883fd2c> |
| /opt/ezmlm-browse-0.20/globalfns.py in rec_showpart(ctxt={'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, part=<email.message.Message instance at 0x883fd2c>, partnum=1) |
205 else:
|
206 for p in part.get_payload():
|
207 partnum = rec_showpart(ctxt, p, partnum+1)
|
208 else:
|
209 write(html('msg-sep') % ctxt)
|
| partnum = 1, global rec_showpart = <function rec_showpart at 0x87e21b4>, ctxt = {'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, p = <email.message.Message instance at 0x883fbec> |
| /opt/ezmlm-browse-0.20/globalfns.py in rec_showpart(ctxt={'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, part=<email.message.Message instance at 0x883fbec>, partnum=2) |
208 else:
|
209 write(html('msg-sep') % ctxt)
|
210 sub_showpart(ctxt, part)
|
211 return partnum
|
212
|
| global sub_showpart = <function sub_showpart at 0x87e2144>, ctxt = {'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, part = <email.message.Message instance at 0x883fbec> |
| /opt/ezmlm-browse-0.20/globalfns.py in sub_showpart(ctxt={'cmd': 'showmsg', 'threadidx': 4, 'HTTP_X_FORWA...HTTP_ACCEPT_ENCODING': 'gzip, br, zstd, deflate'}, part=<email.message.Message instance at 0x883fbec>) |
164 type = ctxt[TYPE] = part.get_content_type()
|
165 ctxt[FILENAME] = part.get_filename()
|
166 template = html('msg-' + type.replace('/', '-'))
|
167 if not template:
|
168 template = html('msg-' + type[:type.find('/')])
|
| global template = <function template at 0x87dae9c>, global html = <function html at 0x87daed4>, type = 'application/pgp-signature', type.replace = <built-in method replace of str object at 0x8845e90> |
| /opt/ezmlm-browse-0.20/globalfns.py in html(name='msg-application-pgp-signature') |
40
|
41 def html(name):
|
42 return template(name + '.html')
|
43
|
44 def xml(name):
|
| global template = <function template at 0x87dae9c>, name = 'msg-application-pgp-signature' |
| /opt/ezmlm-browse-0.20/globalfns.py in template(filename='msg-application-pgp-signature.html') |
31 except IOError:
|
32 if not _template_zipfile:
|
33 _template_zipfile = zipfile.ZipFile(sys.argv[0])
|
34 try:
|
35 f = _template_zipfile.open(n).read()
|
| global _template_zipfile = None, global zipfile = <module 'zipfile' from '/usr/lib/python2.5/zipfile.pyc'>, zipfile.ZipFile = <class zipfile.ZipFile at 0x8773a7c>, global sys = <module 'sys' (built-in)>, sys.argv = ['-c', '/opt/ezmlm-browse-0.20'] |
| /usr/lib/python2.5/zipfile.py in __init__(self=<zipfile.ZipFile instance at 0x87efa6c>, file='-c', mode='r', compression=0, allowZip64=False) |
337 self.filename = file
|
338 modeDict = {'r' : 'rb', 'w': 'wb', 'a' : 'r+b'}
|
339 self.fp = open(file, modeDict[mode])
|
340 else:
|
341 self._filePassed = 1
|
| self = <zipfile.ZipFile instance at 0x87efa6c>, self.fp = None, builtin open = <built-in function open>, file = '-c', modeDict = {'a': 'r+b', 'r': 'rb', 'w': 'wb'}, mode = 'r' |
<type 'exceptions.IOError'>: [Errno 2] No such file or directory: '-c'
args =
(2, 'No such file or directory')
errno =
2
filename =
'-c'
message =
''
strerror =
'No such file or directory'
