pydb(1) 						      General Commands Manual							   pydb(1)

NAME

       pydb -- enhanced Python debugger

SYNOPSIS

       pydb [debugger-options] python-script [script-options...]

DESCRIPTION

       This manual page documents briefly the pydb command.

       pydb  is  an  extended  Python debugger. It extends the Python standard debugger pdb and is suited for use with the graphical debugger DDD.
       The purpose of a debugger such as this one is to allow you to see what is going on ``inside'' another program while  it	executes--or  what
       another program was doing at the moment it crashed.

       We follow gdb's command set unless there's good reason not to.

       pydb can do four main kinds of things (plus other things in support of these) to help you catch bugs in the act:

	  o Start or restart your Python script, specifying arguments that might affect its behavior.

	  o Make your program stop at various points possibly determined by
	      specified conditions.

	  o Examine what has happened when your program has stopped.

	  o Change things in your program, so you can experiment with correcting the effects of one bug and go on to learn about another.

       Here are some of the most frequently-needed commands:

       break [file:line|function]
	       Set a breakpoint at function or at the specified file and line.

       clear [file:line|function]
		Clear  a  breakpoint  at function or at the specified file and line. If line number is specified, all breakpoints in that line are
	      cleared. If a function is specified, breakpoints at beginning of function are cleared.  With no argument, clears all breakpoints	in
	      the line that the selected frame is executing in. See also the delete command which clears breakpoints by number.

       continue [line]
		Continue  running your program until the next breakpoint or until the end of the program. If a line number is given set a one-time
	      breakpoint at that line.

       delete [breakpoint-numbers]
	       Delete breakpoints by number. To delete all breakpoints, give no breakpoint number.  See also the clear command which clears break-
	      points by line/file number.

       disassemble [location]
		Disassemble  Python instructions at the point you are currently stopped at. If location is a line number, do not show instructions
	      before line. Location can also be a class, method, function, code or string argument.

       examine expr
	       Give type/object and value information about expression.

	      finish
	       Run until the completion of the current function or method.

       frame frame-number
	       Set the stack frame to frame-number for purposes of examinine local variables. For positioning relative to the current  frame,  use
	      up or down.

       help [name]
	      Show information about pydb command name, or general information about using pydb.

       info [name]
	       Get the various information usually about the debugged program.

       list [file:line|function]
	      type the text of the program in the vicinity of where it is presently stopped or at the specified function or file and line.

       next [count]
	      Execute next program line(s) (after stopping); step over any function calls in the line.

       pp expr
	       Pretty print the value of an expression.

       print expr
	       Display the value of an expression.

       source filename
		Read  and execute the lines in file filename as a series of debugger commands. An error in any command terminates execution of the
	      command file and control is returned to the console.

       quit    Exit from the debugger.

       run [arglist]
	      (Re)start your program (with arglist, if specified). If you want the debugger to get reloaded, use restart instead.

       set    Modify parts of the debugger environment.

       shell command
	      Run a shell command.

       show   See the debugger environment settings

       step [count]
	      Execute next program line(s) (after stopping); step into any function calls in the line.

       where [count]
	      Display all or count items of the program stack.

       For full details on pydb, see http://bashdb.sourceforge.net/pydb/pydb/index.html

OPTIONS

       --version show the version number and exit

       -h | --help
		 show invocation help and exit

       -X | --trace
		 Show lines before executing them. This option also sets --batch.

       -X | --fntrace
		 Show functions before executing them. This option also sets --batch

       --batch	 Don't run interactive commands on debugger entry

       --basename
		 Report file locations as only the base filename, and omit the directory name. This is useful in running regression tests.

       -x | --command=FILE
		 Execute commands from FILE.

       --cd=DIR  Change current directory to DIR.

       --error=FILE
		 Write debugger's error output (stderr) to FILE

       -e | --exec
		 Run debugger commands command-list. Commands should be separated by ";;"-the same as you would do inside the  debugger.  You  may
		 need to quote this option to prevent command shell interpretation, e.g.  --exec "break 20;; continue"

       -n | --nx Don't execute commands found in any initialization files

       -o FILE | --output=FILE
		 Write debugger's output (stdout) to FILE

       --sigcheck
		 Set to watch for signal handler changes.

       -T, --threading
		 Start off with threading debug support.

       -A LEVEL | --annotate=LEVEL
		 Set  gdb-like	annotation_level.  The	annotation level is used by front-ends to get posted about program information when things
		 change without having to poll for the information.

SEE ALSO

       http://bashdb.sourceforge.net/pydb/

       http://bashdb.sourceforge.net/pydb/lib/index.html

AUTHOR

       pydb was written by Richard Wolff <rwolff@noao.edu> (now retired) based on the standard Python debugger pdb.py. Over the many years, pdb.py
       and pydb.py have diverged. It was subsequently revised and expanded to be more like gdb by Rocky Bernstein <rocky@gnu.org>

       The  first  version  of this manual page was written by Gregor Hoffleit <flight@debian.org> for the Debian project (but may be used by oth-
       ers).

																	   pydb(1)