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Guido van Rossum
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Lib/pdb.doc
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Lib/pdb.doc
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@ -3,8 +3,8 @@ The Python Debugger
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To use the debugger in its simplest form:
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>>> import pdb
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>>> pdb.run('<a statement>')
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>>> import pdb
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>>> pdb.run('<a statement>')
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The debugger's prompt is '(Pdb) '. This will stop in the first
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function call in <a statement>.
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@ -13,10 +13,10 @@ Alternatively, if a statement terminated with an unhandled exception,
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you can use pdb's post-mortem facility to inspect the contents of the
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traceback:
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>>> <a statement>
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<exception traceback>
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>>> import pdb
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>>> pdb.pm()
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>>> <a statement>
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<exception traceback>
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>>> import pdb
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>>> pdb.pm()
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The commands recognized by the debugger are listed in the next
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section. Most can be abbreviated as indicated; e.g., h(elp) means
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@ -50,17 +50,17 @@ h(elp)
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"help exec" gives help on the ! command
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w(here)
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Print a stack trace, with the most recent frame at the bottom.
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An arrow indicates the "current frame", which determines the
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context of most commands.
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Print a stack trace, with the most recent frame at the bottom.
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An arrow indicates the "current frame", which determines the
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context of most commands.
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d(own)
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Move the current frame one level down in the stack trace
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(to an older frame).
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Move the current frame one level down in the stack trace
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(to an older frame).
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u(p)
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Move the current frame one level up in the stack trace
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(to a newer frame).
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Move the current frame one level up in the stack trace
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(to a newer frame).
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b(reak) ([file:]lineno | function) [, "condition"]
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With a line number argument, set a break there in the current
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@ -74,51 +74,51 @@ b(reak) ([file:]lineno | function) [, "condition"]
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hasn't been loaded yet). The file is searched on sys.path.
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cl(ear) [lineno]
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With a line number argument, clear that break in the current file.
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Without argument, clear all breaks (but first ask confirmation).
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With a line number argument, clear that break in the current file.
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Without argument, clear all breaks (but first ask confirmation).
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The line number may be prefixed with a filename and a colon,
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to specify a breakpoint in another file (probably one that
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hasn't been loaded yet). The file is searched on sys.path.
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s(tep)
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Execute the current line, stop at the first possible occasion
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(either in a function that is called or in the current function).
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Execute the current line, stop at the first possible occasion
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(either in a function that is called or in the current function).
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n(ext)
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Continue execution until the next line in the current function
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is reached or it returns.
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Continue execution until the next line in the current function
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is reached or it returns.
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r(eturn)
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Continue execution until the current function returns.
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Continue execution until the current function returns.
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c(ont(inue))
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Continue execution, only stop when a breakpoint is encountered.
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Continue execution, only stop when a breakpoint is encountered.
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l(ist) [first [,last]]
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List source code for the current file.
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Without arguments, list 11 lines around the current line
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or continue the previous listing.
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With one argument, list 11 lines starting at that line.
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With two arguments, list the given range;
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if the second argument is less than the first, it is a count.
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List source code for the current file.
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Without arguments, list 11 lines around the current line
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or continue the previous listing.
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With one argument, list 11 lines starting at that line.
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With two arguments, list the given range;
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if the second argument is less than the first, it is a count.
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a(rgs)
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Print the argument list of the current function.
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Print the argument list of the current function.
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p expression
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Print the value of the expression.
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Print the value of the expression.
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(!) statement
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Execute the (one-line) statement in the context of
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the current stack frame.
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The exclamation point can be omitted unless the first word
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of the statement resembles a debugger command.
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To assign to a global variable you must always prefix the
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command with a 'global' command, e.g.:
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(Pdb) global list_options; list_options = ['-l']
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(Pdb)
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Execute the (one-line) statement in the context of
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the current stack frame.
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The exclamation point can be omitted unless the first word
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of the statement resembles a debugger command.
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To assign to a global variable you must always prefix the
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command with a 'global' command, e.g.:
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(Pdb) global list_options; list_options = ['-l']
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(Pdb)
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q(uit)
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Quit from the debugger.
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The program being executed is aborted.
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Quit from the debugger.
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The program being executed is aborted.
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