One liner for callstack without all the gems's: One liner for callstack without all the gems's and relative to current directory. Often, however, your code is a lot more complicated. The command set print frame-info (see Print Settings) controls However, it only prints function addresses, not their names for my program. Red underline: The second line for these calls contains the actual code that was executed. Note: To learn more about Python’s logging system, check out Logging in Python. Now when you run the script with a URL that will result in a ConnectionError being raised, you’ll get printed a -1 for the status code, and the content Connection Error: This works great. If you add a call to greet() to the bottom of greetings.py and specify a keyword argument that it isn’t expecting (for example greet('Chad', greting='Yo')), then you’ll get the following traceback: Once again, with a Python traceback, it’s best to work backward, moving up the output. Note: Python’s feature of displaying the previous exceptions tracebacks were added in Python 3. What is the closest distance a human being has come to Mars ever since the beginning of the space age? Linear Regression as an Optimization Problem. Curated by the Real Python team. shown as ‘’. Examples might be simplified to improve reading and learning. 1 in those positions, and hence all the (recursive) configurations following this one. How do I get ruby to print a full backtrace instead of a truncated one? Print only the outermost n frames, where n is a positive This command will print one line per frame for frames in the stack. WARNING! (Source). Win Yourself a Ferrari With Simple Mathematics, The Emergence of Calculus: A Mathematical Journey of Human Thought. The first line of each call contains information like the file name, line number, and module name, all specifying where the code can be found. your coworkers to find and share information. Here’s what However, they are subtly different: The error message lines reflect these differences. In a multi-threaded program, GDB by default shows the If you are unfamiliar or just want a refresher, then you should check out Python Exceptions: An Introduction. The final line of the traceback output tells you what type of exception was raised along with some relevant information about that exception. line number, as well as the arguments to the function. Is there a way to do this from the command line instead? The messages that follow the exception type, everything after the colon, give you some great information. backtrace and set print subcommands: Set whether backtraces should continue past main. But, hey, we already computed a configuration with piece no. to the filtered frames that cause them to be elided. Note: This tutorial assumes you understand Python exceptions.