Antoon Pardon wrote:
> This is python 3.4 on a debian box
>
> In the code below, line 36 raises a StopIteration, I would have
> thought that this exception would be caught by line 39 but instead
> I get a traceback.
>
> Did I miss something or is this a bug?
Your code structure is
try:
raise FileNotFoundError
except FileNotFoundError:
# try ... except FileNotFoundError inside this handler
# omitted as it is only a distraction
raise StopIteration
except StopIteration:
...
This will only catch StopIteration-s in the first try block (lines 22 and
23). To handle exceptions in the first except you need another level of
try...except, either
try:
try:
raise FileNotFoundError:
except FileNotFoundError:
raise StopIteration
except StopIteration:
...
or
try:
raise FileNotFoundError:
except FileNotFoundError:
try:
raise StopIteration
except StopIteration:
...
else:
...
>
> This is the code:
>
> try: # 21
> filename = os.path.join(lang_path, lang) # 22
> fl = open(filename) # 23
> except FileNotFoundError: # 24
> try: # 25
> lst = lang.split('_') # 26
> prefix = lst[0] + '*' # 27
> try: # 28
> lst[1] = lst[0].upper() # 29
> except IndexError: # 30
> lst.append(lst[0].upper()) # 31
> lang = '_'.join(lst) # 32
> filename = os.path.join(lang_path, lang) # 33
> fl = open(filename) # 34
> except FileNotFoundError: # 35
> lang = next(iglob(os.path.join(lang_path, prefix))) # 36
> filename = os.path.join(lang_path, lang) # 37
> fl = open(filename) # 38
> except StopIteration: # 39
> fl = () # 40
>
> This is the traceback:
>
> Traceback (most recent call last):
> File "/home/antoon/src/projecten/richter/translate.py", line 23, in
> use_lang
> fl = open(filename)
> FileNotFoundError: [Errno 2] No such file or directory:
> '/home/antoon/src/projecten/richter/locus/nl'
>
> During handling of the above exception, another exception occurred:
>
> Traceback (most recent call last):
> File "/home/antoon/src/projecten/richter/translate.py", line 34, in
> use_lang
> fl = open(filename)
> FileNotFoundError: [Errno 2] No such file or directory:
> '/home/antoon/src/projecten/richter/locus/nl_NL'
>
> During handling of the above exception, another exception occurred:
>
> Traceback (most recent call last):
> File "lang_test", line 4, in <module>
> use_lang("Nederlands")
> File "/home/antoon/src/projecten/richter/translate.py", line 36, in
> use_lang
> lang = next(iglob(os.path.join(lang_path, prefix)))
> StopIteration
>
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