Of course, skipping the try except block reveals the same message. Only use them if you know you are going to get an error message that would be thrown that isn't a python error or you want to do something else if there is an error. foo = 'a' bar = 1 concat = foo + bar Traceback ( most recent call last ) : File " " , line 1 , in module > concat = foo + bar TypeError : must be str , not int a better non-fail try : concat = foo + bar except : concat = "{}{}" . format ( foo , bar ) concat 'a1'

Unless you specifically ask for the exception, the error message won't be displayed - that's the point of try/except: foo = 'a' bar = 1 try : concat = foo + bar except Exception as e : print ( e ) must be str , not int Of course, you may have this, but we can't see your try/except statement.

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Append gives a empty string error

dougbrowning

had to delete

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DanPatterson_Retired

Of course, skipping the try except block reveals the same message.

Only use them if you know you are going to get an error message that would be thrown that isn't a python error or you want to do something else if there is an error.

foo <SPAN class="operator token">=</SPAN> <SPAN class="string token">'a'</SPAN>
bar <SPAN class="operator token">=</SPAN> <SPAN class="number token">1</SPAN>


concat <SPAN class="operator token">=</SPAN> foo <SPAN class="operator token">+</SPAN> bar
Traceback <SPAN class="punctuation token">(</SPAN>most recent call last<SPAN class="punctuation token">)</SPAN><SPAN class="punctuation token">:</SPAN>

&nbsp; File <SPAN class="string token">"<ipython-input-56-ef8dcb5742bb>"</SPAN><SPAN class="punctuation token">,</SPAN> line <SPAN class="number token">1</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="keyword token">in</SPAN> <SPAN class="operator token"><</SPAN>module<SPAN class="operator token">></SPAN>
&nbsp;&nbsp;&nbsp; concat <SPAN class="operator token">=</SPAN> foo <SPAN class="operator token">+</SPAN> bar

TypeError<SPAN class="punctuation token">:</SPAN> must be str<SPAN class="punctuation token">,</SPAN> <SPAN class="operator token">not</SPAN> int<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

a better non-fail

<SPAN class="keyword token">try</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; concat <SPAN class="operator token">=</SPAN> foo <SPAN class="operator token">+</SPAN> bar
<SPAN class="keyword token">except</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; concat <SPAN class="operator token">=</SPAN> <SPAN class="string token">"{}{}"</SPAN><SPAN class="punctuation token">.</SPAN>format<SPAN class="punctuation token">(</SPAN>foo<SPAN class="punctuation token">,</SPAN> bar<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp;&nbsp; 

concat
<SPAN class="string token">'a1'</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

DarrenWiens2

Unless you specifically ask for the exception, the error message won't be displayed - that's the point of try/except:

foo <SPAN class="operator token">=</SPAN> <SPAN class="string token">'a'</SPAN>
bar <SPAN class="operator token">=</SPAN> <SPAN class="number token">1</SPAN>
<SPAN class="keyword token">try</SPAN><SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; concat <SPAN class="operator token">=</SPAN> foo <SPAN class="operator token">+</SPAN> bar
<SPAN class="keyword token">except</SPAN> Exception <SPAN class="keyword token">as</SPAN> e<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp;&nbsp; <SPAN class="keyword token">print</SPAN><SPAN class="punctuation token">(</SPAN>e<SPAN class="punctuation token">)</SPAN>‍‍‍‍‍‍

must be str<SPAN class="punctuation token">,</SPAN> <SPAN class="operator token">not</SPAN> int‍‍‍‍‍‍‍‍<SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Of course, you may have this, but we can't see your try/except statement.

dougbrowning

Umm ok I added a try. Not sure why that matters. I cant post all 300 lines.

Really just asking if anyone has gotten a blank error on Append.

thanks

JoshuaBixby

You state the "tool trips the try statement," but I don't see any try statement in what you posted. If the code you posted is the working code, then I suggest you post the code that generates the error if it is the error you are trying to get feedback on.

dougbrowning

yea just a part of the code - its 300 lines...

Yes the error is blank - that was the whole point of my post. It works yet fails with error text of ''.

thanks

JoshuaBixby

Did your code get cut off? For one, I don't see a try statement anywhere in what you posted. Also, there is no text below "Error is".

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