[Python-ideas] Re: for ... except, with ... except

July 26, 2019

      On 2019-07-26 19:26, Serhiy Storchaka wrote:
[snip]
...
I propose to add "except" clause to "for" and "with" statement to catch
exceptions in the code that can't be wrapped with "try ... except".
for VAR in EXPR:
          BLOCK
      except EXC:
          HANDLER
should be equivalent to
try:
          _it = iter(EXPR)
      except EXC:
          HANDLER
      else:
          while True:
              try:
                  VAR = next(_it)
              except StopIteration:
                  break
              except EXC:
                  HANDLER
                  break
              BLOCK
[snip]
1. The 'for' loop can have an 'else' clause, and so can the 'try' 
statement. Is there any ambiguity over its meaning?

2. In your example you have it catching the exception if EXPR or 
iter(EXPR) raises. Is that a good idea?

[Python-ideas] Re: for ... except, with ... except

MRAB