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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hello all!<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><span style='mso-spacerun:yes'> </span>I have a piece
of <span class=SpellE><span class=GramE>gui</span></span> code using <span
class=SpellE>Tkinter</span> that I put in a file <span class=SpellE>viewcvs.py</span>
of <span class=SpellE>ViewCVS</span> software. What I’m trying to do is,
display a dialog box when user clicks on a link “Download” The
purpose is to ask for a username before allowing user to download files. As
soon as username is entered in dialog box, it will verify the name. The code
works stand-alone but gives me error in <span class=SpellE>viewcvs.py</span>
file. Anyone has any idea why? Thanks in advance.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Parimala<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Code:<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><span class=GramE><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>sys.path.append</span></font></span></span><span
class=GramE><font face=Arial><span style='font-family:Arial'>(</span></font></span><font
face=Arial><span style='font-family:Arial'>‘/usr/lib/python1.5/lib-tk/’)<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=GramE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>import</span></font></span><font
face=Arial><span style='font-family:Arial'> <span class=SpellE>Tkinter</span><o:p></o:p></span></font></p>
<p class=MsoNormal><span class=GramE><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>root</span></font></span><font
face=Arial><span style='font-family:Arial'> = <span class=SpellE>Tkinter.Tk</span>()<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><span class=GramE><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>Tkinter.Label</span></font></span></span><span
class=GramE><font face=Arial><span style='font-family:Arial'>(</span></font></span><font
face=Arial><span style='font-family:Arial'>text=”Welcome”)<o:p></o:p></span></font></p>
<p class=MsoNormal><span class=SpellE><span class=GramE><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>root.mainloop</span></font></span></span><span
class=GramE><font face=Arial><span style='font-family:Arial'>()</span></font></span><font
face=Arial><span style='font-family:Arial'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<h1><b style='mso-bidi-font-weight:normal'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial;mso-font-kerning:0pt;mso-bidi-font-weight:
normal'>Python Exception <span class=SpellE>Occured</span></span></font></b><o:p></o:p></h1>
<pre><span class=SpellE><font size=2 face="Courier New"><span style='font-size:
10.0pt'>Traceback</span></font></span> (innermost last):<o:p></o:p></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span>File "/usr/local/viewcvs-0.9.2/lib/viewcvs.py", line 2741, in <span
class=SpellE>run_cgi</span><o:p></o:p></span></font></pre><pre><font size=2
face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span><span
class=GramE>main()</span><o:p></o:p></span></font></pre><pre><font size=2
face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span>File "/usr/local/viewcvs-0.9.2/lib/viewcvs.py", line 2722, in main<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>download_<span class=GramE>tarball</span></span><span class=GramE>(</span>request)<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span>File "/usr/local/viewcvs-0.9.2/lib/viewcvs.py", line 2624, in <span
class=SpellE>download_tarball</span><o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span><span
class=GramE>root</span> = <span class=SpellE>Tkinter.Tk</span>()<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span>File "/usr/lib/python1.5/site-packages/lib-tk/Tkinter.py", line 886, in __init__<o:p></o:p></span></font></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><span style='mso-spacerun:yes'> </span><span
class=SpellE>self.tk</span> = _<span class=SpellE><span class=GramE>tkinter.create</span></span><span
class=GramE>(</span><span class=SpellE>screenName</span>, <span class=SpellE>baseName</span>, <span
class=SpellE>className</span>)<o:p></o:p></span></font></pre><pre><span
class=SpellE><font size=2 face="Courier New"><span style='font-size:10.0pt'>TclError</span></font></span>: no display name and no $DISPLAY environment variable<o:p></o:p></pre><pre><font
size=2 face="Courier New"><span style='font-size:10.0pt'><o:p> </o:p></span></font></pre>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Even if I copy lib-<span class=SpellE>tk</span> in
site-packages dir, it gives me the same error.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
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