Question

The Python standard library and other libraries I use (e.g. PyQt) sometimes use exceptions for non-error conditions. Look at the following except of the function os.get_exec_path(). It uses multiple try statements to catch exceptions that are thrown while trying to find some environment data.

try:
    path_list = env.get('PATH')
except TypeError:
    path_list = None

if supports_bytes_environ:
    try:
        path_listb = env[b'PATH']
    except (KeyError, TypeError):
        pass
    else:
        if path_list is not None:
            raise ValueError(
                "env cannot contain 'PATH' and b'PATH' keys")
        path_list = path_listb

    if path_list is not None and isinstance(path_list, bytes):
        path_list = fsdecode(path_list)

These exceptions do not signify an error and are thrown under normal conditions. When using exception breakpoints for one of these exceptions, the debugger will also break in these library functions.

Is there a way in PyCharm or in Python in general to have the debugger not break on exceptions that are thrown and caught inside a library without any involvement of my code?

Answer 1

This feature is not implemented yet, you can vote for it:

• add ability to break (add breakpoint) on exceptions only for my files