I ran into this when I left import pdb and a pdb.set_trace() in my production code. When the pdb.set_trace() line was executed, python was waiting for my input to tell it to continue or step into, etc… Because the python code was being called by a web server I wasn’t there to press c to … Read more
Late but hopefully still helpful. Make the following alias: alias ll u;;d;;l Then whenever you type ll, pdb will list from the current position. It works by going up the stack and then down the stack, which resets ‘l’ to show from the current position. (This won’t work if you are at the top of … Read more
As mentioned by Arthur in a comment, you can use r(eturn) to run execution to the end of the current function and then stop, which almost steps out of the current function. Then enter n(ext) once to complete the step out, returning to the caller. Documentation is here. (Pdb) ?r r(eturn) Continue execution until the … Read more
And I’ve answered my own question! It’s the “debug” command in pydb: ~> cat -n /tmp/test_python.py 1 #!/usr/local/bin/python 2 3 def foo(): 4 print “hi” 5 print “bye” 6 7 exit(0) 8 ~> pydb /tmp/test_python.py (/tmp/test_python.py:7): <module> 7 exit(0) (Pydb) debug foo() ENTERING RECURSIVE DEBUGGER ————————Call level 11 (/tmp/test_python.py:3): foo 3 def foo(): ((Pydb)) s … Read more
The GNU debugger, gdb: It is extremely slow, as it undoes single machine instruction at a time. The Python debugger, pdb: The jump command takes you backwards in the code, but does not reverse the state of the program. For Python, the extended python debugger prototype, epdb, was created for this reason. Here is the … Read more
At this time, pdb does not have the ability to halt and begin debugging on a running program. You have a few other options: GDB You can use GDB to debug at the C level. This is a bit more abstract because you’re poking around Python’s C source code rather than your actual Python script, … Read more
data breakpoints with pdb …much like you can watch a memory address in gdb… GDB uses data breakpoints, this is made easy with hardware support (hardware watchpoints), this typically involves marking the memory pages read-only which then trips an exception handler on memory access. When hardware watchpoints are not available it uses software watchpoints, these … Read more
Here’s a list of resources to get started with the Python debugger: Read Steve Ferb’s article “Debugging in Python” Watch Eric Holscher’s screencast “Using pdb, the Python Debugger” Read the Python documentation for pdb — The Python Debugger Read Chapter 9—When You Don’t Even Know What to Log: Using Debuggers—of Karen Tracey’s Django 1.1 Testing … Read more
Use the following steps to attach pdb on any python script. Step 1. Add the following in your yml file stdin_open: true tty: true This will enable interactive mode and will attach stdin. This is equivalent for -it mode. Step 2. docker attach <generated_containerid> You’ll now get the pdb shell
pdb is a fully featured python shell, so you can execute arbitrary commands. locals() and globals() will display all the variables in scope with their values. You can use dir() if you’re not interested in the values. When you declare a variable in Python, it’s put into locals or globals as appropriate, and there’s no … Read more