This is how I do it:
>>> import traceback
>>> try:
... int('k')
... except:
... var = traceback.format_exc()
...
>>> print(var)
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
ValueError: invalid literal for int() with base 10: 'k'
You should however take a look at the traceback documentation, as you might find there more suitable methods, depending to how you want to process your variable afterwards...
Answer from mac on Stack OverflowTutorialspoint
tutorialspoint.com › python › python_sys_exc_info_method.htm
Python sys.exc_info() method
import sys try: 1 / 0 except ZeroDivisionError: exc_type, exc_value, exc_traceback = sys.exc_info() print(f"Exception type: {exc_type}") print(f"Exception value: {exc_value}") print(f"Traceback object: {exc_traceback}") Exception type: <class 'ZeroDivisionError'> Exception value: division by zero Traceback object: <traceback object at 0x0000016DCBD35000> This example uses sys.exc_info() method to retrieve the exception details and then uses the traceback module to print the traceback details −
Python Module of the Week
pymotw.com › 2 › sys › exceptions.html
Exception Handling - Python Module of the Week
This example avoids introducing a circular reference between the traceback object and a local variable in the current frame by ignoring that part of the return value from exc_info(). If the traceback is needed (e.g., so it can be logged), explicitly delete the local variable (using del) to avoid cycles. $ python sys_exc_info.py Handling RuntimeError exception with message "This is the error message" in Thread-2 Handling RuntimeError exception with message "This is the error message" in Thread-1
Top answer 1 of 5
266
This is how I do it:
>>> import traceback
>>> try:
... int('k')
... except:
... var = traceback.format_exc()
...
>>> print(var)
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
ValueError: invalid literal for int() with base 10: 'k'
You should however take a look at the traceback documentation, as you might find there more suitable methods, depending to how you want to process your variable afterwards...
2 of 5
40
sys.exc_info() returns a tuple with three values (type, value, traceback).
- Here type gets the exception type of the Exception being handled
- value is the arguments that are being passed to constructor of exception class
- traceback contains the stack information like where the exception occurred etc.
For Example, In the following program
try:
a = 1/0
except Exception,e:
exc_tuple = sys.exc_info()
Now If we print the tuple the values will be this.
- exc_tuple[0] value will be "ZeroDivisionError"
- exc_tuple[1] value will be "integer division or modulo by zero" (String passed as parameter to the exception class)
- exc_tuple[2] value will be "trackback object at (some memory address)"
The above details can also be fetched by simply printing the exception in string format.
print str(e)
Iditect
iditect.com › guide › python › exception-sys-exc-info.html
Python sys.exc_info() method: get exception information
Here's a tutorial on using sys.exc_info() in Python: ... def divide(a, b): return a / b try: result = divide(10, 0) except ZeroDivisionError: exc_type, exc_value, exc_traceback = sys.exc_info() print(f"An error occurred: {exc_type}: {exc_value}") In this example, we use sys.exc_info() to get ...
Python Programming
pythonprogramming.net › headless-error-handling-intermediate-python-tutorial
Headless Error Handling Python Tutorial
import sys import logging def error_handling(): return 'Error: {}. {}, line: {}'.format(sys.exc_info()[0], sys.exc_info()[1], sys.exc_info()[2].tb_lineno) try: a+b except: logging.error(error_handling()) ... ERROR:root:Error: <class 'NameError'>. name 'a' is not defined, line: 9 · Obviously, you can also configure logging to instead log this to a file. See the logging tutorial in this series for more information there. The next tutorial: __str__ and __repr_ in Python 3
PyTutorial
pytutorial.com › python-sysexc_info-handling-exceptions-with-detailed-information
PyTutorial | Python sys.exc_info(): Handling Exceptions with Detailed Information
November 4, 2024 - For more on managing Python errors, ... and Python sys.stderr: Handling Error Output for handling program exits and error output respectively. sys.exc_info() is useful for nested try-except blocks where multiple exceptions might be raised and handled differently. Here’s an example...
Fedorkobak
fedorkobak.github.io › python › standard_library › logging › exception_information.html
Exceptions information — Python
log_filename = "exception_information_files/excep_in_excep.log" logging.basicConfig( level=logging.INFO, filename=log_filename, filemode="w", format="%(asctime)s %(levelname)s %(message)s" ) def inside_exception(): try: 7/0 except: pass def outside_exception(): try: inside_exception() "hello" + 7 except: logging.error("Any error", exc_info=True) outside_exception() with open(log_filename) as f: print(f.read())
Python Module of the Week
pymotw.com › 2 › traceback
traceback – Extract, format, and print exceptions and stack traces. - Python Module of the Week
import traceback import sys from pprint import pprint from traceback_example import produce_exception try: produce_exception() except Exception, err: print 'format_exception():' exc_type, exc_value, exc_tb = sys.exc_info() pprint(traceback.format_exception(exc_type, exc_value, exc_tb)) $ python traceback_format_exception.py format_exception(): ['Traceback (most recent call last):\n', ' File "traceback_format_exception.py", line 17, in <module>\n produce_exception()\n', ' File "/Users/dhellmann/Documents/PyMOTW/src/PyMOTW/traceback/traceback_example.py", line 16, in produce_exception\n produce_
IT trip
en.ittrip.xyz › python
Mastering Exception Handling in Python with sys.exc_info(): A Detailed Guide | IT trip
November 5, 2023 - When developing a custom exception handling framework where you need to manipulate or analyze the traceback data. For more sophisticated error handling, you might want to extract detailed traceback information. This can be done by using the `traceback` module in conjunction with `sys.exc_info()`: import sys import traceback try: # Some faulty code raise ValueError("An example error.") except: exc_type, exc_value, exc_tb = sys.exc_info() tb_details = traceback.extract_tb(exc_tb) detailed_traceback = "\n".join(traceback.format_list(tb_details)) print(f"Detailed traceback:\n{detailed_traceback}")
Read the Docs
python.readthedocs.io › en › latest › c-api › exceptions.html
Exception Handling — Python 3.14.7 documentation
August 8, 2021 - Set the exception info, as known from sys.exc_info(). This refers to an exception that was already caught, not to an exception that was freshly raised. This function “steals” the references of the arguments.
Linuxtopia
linuxtopia.org › online_books › programming_books › python_programming › python_ch17s06.html
Python - Exception Functions
The sys module provides one function that provides the details of the exception that was raised. Programs with exception handling will occasionally use this function · The sys.exc_info function returns a 3-tuple with the exception, the exception's parameter, and a traceback object that pinpoints ...
Python
wiki.python.org › moin › HandlingExceptions
HandlingExceptions - Python Wiki
Give example of multiple excepts. Handling multiple excepts in one line. In the "general error handling" section above, it says to catch all exceptions, you use the following code: 1 import sys 2 3 try: 4 untrusted.execute() 5 except: # catch *all* exceptions 6 e = sys.exc_info()[0] 7 write_to_page("<p>Error: %s</p>" % e)
docs.python.org
docs.python.org › 3 › library › traceback.html
traceback — Print or retrieve a stack traceback
Format the exception part of a ... sys.last_exc. The return value is a list of strings, each ending in a newline. The list contains the exception’s message, which is normally a single string; however, for SyntaxError exceptions, it contains several lines that (when printed) display detailed information about where ...
Andrea Minini
andreaminini.net › computer-science › python › sysexc_info-function-in-python
Sys.exc_info() Function in Python - Andrea Minini
The exc_info() function returns information about the most recent exception that was raised. It is particularly useful for handling unexpected errors within a try except block. Note: Since this is a function from an external library (sys), to use it in a Python script, you need to import the ...
Real Python
realpython.com › lessons › capturing-stack-traces
Capturing Stack Traces (Video) – Real Python
We can do that by logging the stack trace. All we have to do is pass the exc_info parameter, short for exception info, as True. 00:18 We can pass this to any of the severity level functions.
Published: July 23, 2019
Linux Journal
linuxjournal.com › article › 5821
Simplified Exception Identification in Python | Linux Journal
import sys try: x = x + 1 except: print sys.exc_info()
GitHub
github.com › hynek › structlog › issues › 590
Unexpected handling of exc_info in structlog v24 when using .exception · Issue #590 · hynek/structlog
January 23, 2024 - import sys import structlog def custom_exception_processor(logger, name, event_dict): if "exc_info" in event_dict: exc_type, exc_value, exc_tb = sys.exc_info() if exc_value is not None: event_dict["event"] = str(exc_value) del event_dict["exc_info"] return event_dict structlog.configure(processors=[custom_exception_processor, structlog.stdlib.add_log_level, structlog.stdlib.add_logger_name, structlog.dev.ConsoleRenderer(), structlog.stdlib.ProcessorFormatter.wrap_for_formatter], wrapper_class=structlog.stdlib.BoundLogger, logger_factory=structlog.stdlib.LoggerFactory()) logger = structlog.getL
Author: hynek
Squash
squash.io › how-to-print-an-exception-in-python
How to Print an Exception in Python - Squash Labs
November 2, 2023 - Related Article: How to Manipulate Strings in Python and Check for Substrings · The sys module provides access to some variables used or maintained by the interpreter and to functions that interact strongly with the interpreter. To print an exception using the sys module, you can use the sys.exc_info() function to get the exception information. Here's an example:
GitHub
github.com › python › cpython › issues › 108668
`exc_info` can get lost when `throw`ing into an `await` or `yield from` · Issue #108668 · python/cpython
August 30, 2023 - # # (to reproduce, suppose that we get a cancellation request before the optional # clean up step.) asyncio.current_task().cancel() try: await asyncio.sleep(0) except CancelledError: if sys.version_info >= (3, 11): asyncio.current_task().uncancel() # after the optional async clean up, log the exception. print(sys.exc_info()) async def clean_up_and_log(): # this example is >= 3.11 only.
Author: python