SyntaxError inconsistency in Python?

by

In the first case, the exception is raised by the compiler, which is running before the try/except structure even exists (since it’s the compiler itself that will set it up right after parsing). In the second case, the compiler is running twice — and the exception is getting raised when the compiler runs as part of eval, after the first run of the compiler has already set up the try/except.

So, to intercept syntax errors, one way or another, you have to arrange for the compiler to run twice — eval is one way, explicit compile built-in function calls another, import is quite handy (after writing the code to another file), exec and execfile other possibilities yet. But however you do it, syntax errors can be caught only after the compiler has run one first time to set up the try/except blocks you need!

More Related Contents:

  1. Manually raising (throwing) an exception in Python
  2. Importing installed package from script raises “AttributeError: module has no attribute” or “ImportError: cannot import name”
  3. Why is “except: pass” a bad programming practice?
  4. django MultiValueDictKeyError error, how do I deal with it
  5. Is it a good practice to use try-except-else in Python?
  6. Catch a thread’s exception in the caller thread?
  7. selenium.common.exceptions.InvalidSelectorException with “span:contains(‘string’)”
  8. How to print an exception in Python?
  9. When I catch an exception, how do I get the type, file, and line number?
  10. How to retry after exception?
  11. Why return NotImplemented instead of raising NotImplementedError
  12. How do I log a Python error with debug information?
  13. How to handle exceptions in a list comprehensions?
  14. How to get exception message in Python properly
  15. Python type hinting with exceptions
  16. How can I make silent exceptions louder in tkinter?
  17. Is there a way to prevent a SystemExit exception raised from sys.exit() from being caught?
  18. “Inner exception” (with traceback) in Python?
  19. Python: How to ignore an exception and proceed? [duplicate]
  20. hasattr() vs try-except block to deal with non-existent attributes
  21. How to re-raise an exception in nested try/except blocks?
  22. Is there a difference between “raise exception()” and “raise exception” without parenthesis?
  23. Try/catch or validation for speed?
  24. Python FAQ: “How fast are exceptions?”
  25. Python: Is it bad form to raise exceptions within __init__?
  26. raise statement on a conditional expression
  27. How do I create a directory, and any missing parent directories?
  28. How to silence “sys.excepthook is missing” error?
  29. Can Syntax Errors be handled?
  30. Can Syntax Errors be handled?

Leave a Comment