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-rw-r--r--Doc/library/bdb.rst340
1 files changed, 171 insertions, 169 deletions
diff --git a/Doc/library/bdb.rst b/Doc/library/bdb.rst
index 84ea0ae..f04b671 100644
--- a/Doc/library/bdb.rst
+++ b/Doc/library/bdb.rst
@@ -31,32 +31,35 @@ The :mod:`bdb` module also defines two classes:
first line of that function is executed. A conditional breakpoint always
counts a hit.
-:class:`Breakpoint` instances have the following methods:
+ :class:`Breakpoint` instances have the following methods:
-.. method:: Breakpoint.deleteMe()
+ .. method:: deleteMe()
- Delete the breakpoint from the list associated to a file/line. If it is the
- last breakpoint in that position, it also deletes the entry for the
- file/line.
+ Delete the breakpoint from the list associated to a file/line. If it is
+ the last breakpoint in that position, it also deletes the entry for the
+ file/line.
-.. method:: Breakpoint.enable()
- Mark the breakpoint as enabled.
+ .. method:: enable()
-.. method:: Breakpoint.disable()
+ Mark the breakpoint as enabled.
- Mark the breakpoint as disabled.
-.. method:: Breakpoint.bpprint([out])
+ .. method:: disable()
- Print all the information about the breakpoint:
+ Mark the breakpoint as disabled.
- * The breakpoint number.
- * If it is temporary or not.
- * Its file,line position.
- * The condition that causes a break.
- * If it must be ignored the next N times.
- * The breakpoint hit count.
+
+ .. method:: pprint([out])
+
+ Print all the information about the breakpoint:
+
+ * The breakpoint number.
+ * If it is temporary or not.
+ * Its file,line position.
+ * The condition that causes a break.
+ * If it must be ignored the next N times.
+ * The breakpoint hit count.
.. class:: Bdb()
@@ -68,247 +71,246 @@ The :mod:`bdb` module also defines two classes:
(:class:`pdb.Pdb`) is an example.
-The following methods of :class:`Bdb` normally don't need to be overridden.
-
-.. method:: Bdb.canonic(filename)
+ The following methods of :class:`Bdb` normally don't need to be overridden.
- Auxiliary method for getting a filename in a canonical form, that is, as a
- case-normalized (on case-insensitive filesystems) absolute path, stripped
- of surrounding angle brackets.
+ .. method:: canonic(filename)
-.. method:: Bdb.reset()
+ Auxiliary method for getting a filename in a canonical form, that is, as a
+ case-normalized (on case-insensitive filesystems) absolute path, stripped
+ of surrounding angle brackets.
- Set the :attr:`botframe`, :attr:`stopframe`, :attr:`returnframe` and
- :attr:`quitting` attributes with values ready to start debugging.
+ .. method:: reset()
+ Set the :attr:`botframe`, :attr:`stopframe`, :attr:`returnframe` and
+ :attr:`quitting` attributes with values ready to start debugging.
-.. method:: Bdb.trace_dispatch(frame, event, arg)
+ .. method:: trace_dispatch(frame, event, arg)
- This function is installed as the trace function of debugged frames. Its
- return value is the new trace function (in most cases, that is, itself).
+ This function is installed as the trace function of debugged frames. Its
+ return value is the new trace function (in most cases, that is, itself).
- The default implementation decides how to dispatch a frame, depending on the
- type of event (passed as a string) that is about to be executed. *event* can
- be one of the following:
+ The default implementation decides how to dispatch a frame, depending on
+ the type of event (passed as a string) that is about to be executed.
+ *event* can be one of the following:
- * ``"line"``: A new line of code is going to be executed.
- * ``"call"``: A function is about to be called, or another code block
- entered.
- * ``"return"``: A function or other code block is about to return.
- * ``"exception"``: An exception has occurred.
- * ``"c_call"``: A C function is about to be called.
- * ``"c_return"``: A C function has returned.
- * ``"c_exception"``: A C function has thrown an exception.
+ * ``"line"``: A new line of code is going to be executed.
+ * ``"call"``: A function is about to be called, or another code block
+ entered.
+ * ``"return"``: A function or other code block is about to return.
+ * ``"exception"``: An exception has occurred.
+ * ``"c_call"``: A C function is about to be called.
+ * ``"c_return"``: A C function has returned.
+ * ``"c_exception"``: A C function has thrown an exception.
- For the Python events, specialized functions (see below) are called. For the
- C events, no action is taken.
+ For the Python events, specialized functions (see below) are called. For
+ the C events, no action is taken.
- The *arg* parameter depends on the previous event.
+ The *arg* parameter depends on the previous event.
- For more information on trace functions, see :ref:`debugger-hooks`. For more
- information on code and frame objects, refer to :ref:`types`.
+ For more information on trace functions, see :ref:`debugger-hooks`. For
+ more information on code and frame objects, refer to :ref:`types`.
-.. method:: Bdb.dispatch_line(frame)
+ .. method:: dispatch_line(frame)
- If the debugger should stop on the current line, invoke the :meth:`user_line`
- method (which should be overridden in subclasses). Raise a :exc:`BdbQuit`
- exception if the :attr:`Bdb.quitting` flag is set (which can be set from
- :meth:`user_line`). Return a reference to the :meth:`trace_dispatch` method
- for further tracing in that scope.
+ If the debugger should stop on the current line, invoke the
+ :meth:`user_line` method (which should be overridden in subclasses).
+ Raise a :exc:`BdbQuit` exception if the :attr:`Bdb.quitting` flag is set
+ (which can be set from :meth:`user_line`). Return a reference to the
+ :meth:`trace_dispatch` method for further tracing in that scope.
-.. method:: Bdb.dispatch_call(frame, arg)
+ .. method:: dispatch_call(frame, arg)
- If the debugger should stop on this function call, invoke the
- :meth:`user_call` method (which should be overridden in subclasses). Raise a
- :exc:`BdbQuit` exception if the :attr:`Bdb.quitting` flag is set (which can
- be set from :meth:`user_call`). Return a reference to the
- :meth:`trace_dispatch` method for further tracing in that scope.
+ If the debugger should stop on this function call, invoke the
+ :meth:`user_call` method (which should be overridden in subclasses).
+ Raise a :exc:`BdbQuit` exception if the :attr:`Bdb.quitting` flag is set
+ (which can be set from :meth:`user_call`). Return a reference to the
+ :meth:`trace_dispatch` method for further tracing in that scope.
-.. method:: Bdb.dispatch_return(frame, arg)
+ .. method:: dispatch_return(frame, arg)
- If the debugger should stop on this function return, invoke the
- :meth:`user_return` method (which should be overridden in subclasses). Raise
- a :exc:`BdbQuit` exception if the :attr:`Bdb.quitting` flag is set (which can
- be set from :meth:`user_return`). Return a reference to the
- :meth:`trace_dispatch` method for further tracing in that scope.
+ If the debugger should stop on this function return, invoke the
+ :meth:`user_return` method (which should be overridden in subclasses).
+ Raise a :exc:`BdbQuit` exception if the :attr:`Bdb.quitting` flag is set
+ (which can be set from :meth:`user_return`). Return a reference to the
+ :meth:`trace_dispatch` method for further tracing in that scope.
-.. method:: Bdb.dispatch_exception(frame, arg)
+ .. method:: dispatch_exception(frame, arg)
- If the debugger should stop at this exception, invokes the
- :meth:`user_exception` method (which should be overridden in subclasses).
- Raise a :exc:`BdbQuit` exception if the :attr:`Bdb.quitting` flag is set
- (which can be set from :meth:`user_exception`). Return a reference to the
- :meth:`trace_dispatch` method for further tracing in that scope.
+ If the debugger should stop at this exception, invokes the
+ :meth:`user_exception` method (which should be overridden in subclasses).
+ Raise a :exc:`BdbQuit` exception if the :attr:`Bdb.quitting` flag is set
+ (which can be set from :meth:`user_exception`). Return a reference to the
+ :meth:`trace_dispatch` method for further tracing in that scope.
-Normally derived classes don't override the following methods, but they may if
-they want to redefine the definition of stopping and breakpoints.
+ Normally derived classes don't override the following methods, but they may
+ if they want to redefine the definition of stopping and breakpoints.
-.. method:: Bdb.stop_here(frame)
+ .. method:: stop_here(frame)
- This method checks if the *frame* is somewhere below :attr:`botframe` in the
- call stack. :attr:`botframe` is the frame in which debugging started.
+ This method checks if the *frame* is somewhere below :attr:`botframe` in
+ the call stack. :attr:`botframe` is the frame in which debugging started.
-.. method:: Bdb.break_here(frame)
+ .. method:: break_here(frame)
- This method checks if there is a breakpoint in the filename and line
- belonging to *frame* or, at least, in the current function. If the
- breakpoint is a temporary one, this method deletes it.
+ This method checks if there is a breakpoint in the filename and line
+ belonging to *frame* or, at least, in the current function. If the
+ breakpoint is a temporary one, this method deletes it.
-.. method:: Bdb.break_anywhere(frame)
+ .. method:: break_anywhere(frame)
- This method checks if there is a breakpoint in the filename of the current
- frame.
+ This method checks if there is a breakpoint in the filename of the current
+ frame.
-Derived classes should override these methods to gain control over debugger
-operation.
+ Derived classes should override these methods to gain control over debugger
+ operation.
-.. method:: Bdb.user_call(frame, argument_list)
+ .. method:: user_call(frame, argument_list)
- This method is called from :meth:`dispatch_call` when there is the
- possibility that a break might be necessary anywhere inside the called
- function.
+ This method is called from :meth:`dispatch_call` when there is the
+ possibility that a break might be necessary anywhere inside the called
+ function.
-.. method:: Bdb.user_line(frame)
+ .. method:: user_line(frame)
- This method is called from :meth:`dispatch_line` when either
- :meth:`stop_here` or :meth:`break_here` yields True.
+ This method is called from :meth:`dispatch_line` when either
+ :meth:`stop_here` or :meth:`break_here` yields True.
-.. method:: Bdb.user_return(frame, return_value)
+ .. method:: user_return(frame, return_value)
- This method is called from :meth:`dispatch_return` when :meth:`stop_here`
- yields True.
+ This method is called from :meth:`dispatch_return` when :meth:`stop_here`
+ yields True.
-.. method:: Bdb.user_exception(frame, exc_info)
+ .. method:: user_exception(frame, exc_info)
- This method is called from :meth:`dispatch_exception` when :meth:`stop_here`
- yields True.
+ This method is called from :meth:`dispatch_exception` when
+ :meth:`stop_here` yields True.
-.. method:: Bdb.do_clear(arg)
+ .. method:: do_clear(arg)
- Handle how a breakpoint must be removed when it is a temporary one.
+ Handle how a breakpoint must be removed when it is a temporary one.
- This method must be implemented by derived classes.
+ This method must be implemented by derived classes.
-Derived classes and clients can call the following methods to affect the
-stepping state.
+ Derived classes and clients can call the following methods to affect the
+ stepping state.
-.. method:: Bdb.set_step()
+ .. method:: set_step()
- Stop after one line of code.
+ Stop after one line of code.
-.. method:: Bdb.set_next(frame)
+ .. method:: set_next(frame)
- Stop on the next line in or below the given frame.
+ Stop on the next line in or below the given frame.
-.. method:: Bdb.set_return(frame)
+ .. method:: set_return(frame)
- Stop when returning from the given frame.
+ Stop when returning from the given frame.
-.. method:: Bdb.set_trace([frame])
+ .. method:: set_trace([frame])
- Start debugging from *frame*. If *frame* is not specified, debugging starts
- from caller's frame.
+ Start debugging from *frame*. If *frame* is not specified, debugging
+ starts from caller's frame.
-.. method:: Bdb.set_continue()
+ .. method:: set_continue()
- Stop only at breakpoints or when finished. If there are no breakpoints, set
- the system trace function to None.
+ Stop only at breakpoints or when finished. If there are no breakpoints,
+ set the system trace function to None.
-.. method:: Bdb.set_quit()
+ .. method:: set_quit()
- Set the :attr:`quitting` attribute to True. This raises :exc:`BdbQuit` in
- the next call to one of the :meth:`dispatch_\*` methods.
+ Set the :attr:`quitting` attribute to True. This raises :exc:`BdbQuit` in
+ the next call to one of the :meth:`dispatch_\*` methods.
-Derived classes and clients can call the following methods to manipulate
-breakpoints. These methods return a string containing an error message if
-something went wrong, or ``None`` if all is well.
+ Derived classes and clients can call the following methods to manipulate
+ breakpoints. These methods return a string containing an error message if
+ something went wrong, or ``None`` if all is well.
-.. method:: Bdb.set_break(filename, lineno[, temporary=0[, cond[, funcname]]])
+ .. method:: set_break(filename, lineno[, temporary=0[, cond[, funcname]]])
- Set a new breakpoint. If the *lineno* line doesn't exist for the *filename*
- passed as argument, return an error message. The *filename* should be in
- canonical form, as described in the :meth:`canonic` method.
+ Set a new breakpoint. If the *lineno* line doesn't exist for the
+ *filename* passed as argument, return an error message. The *filename*
+ should be in canonical form, as described in the :meth:`canonic` method.
-.. method:: Bdb.clear_break(filename, lineno)
+ .. method:: clear_break(filename, lineno)
- Delete the breakpoints in *filename* and *lineno*. If none were set, an
- error message is returned.
+ Delete the breakpoints in *filename* and *lineno*. If none were set, an
+ error message is returned.
-.. method:: Bdb.clear_bpbynumber(arg)
+ .. method:: clear_bpbynumber(arg)
- Delete the breakpoint which has the index *arg* in the
- :attr:`Breakpoint.bpbynumber`. If *arg* is not numeric or out of range,
- return an error message.
+ Delete the breakpoint which has the index *arg* in the
+ :attr:`Breakpoint.bpbynumber`. If *arg* is not numeric or out of range,
+ return an error message.
-.. method:: Bdb.clear_all_file_breaks(filename)
+ .. method:: clear_all_file_breaks(filename)
- Delete all breakpoints in *filename*. If none were set, an error message is
- returned.
+ Delete all breakpoints in *filename*. If none were set, an error message
+ is returned.
-.. method:: Bdb.clear_all_breaks()
+ .. method:: clear_all_breaks()
- Delete all existing breakpoints.
+ Delete all existing breakpoints.
-.. method:: Bdb.get_break(filename, lineno)
+ .. method:: get_break(filename, lineno)
- Check if there is a breakpoint for *lineno* of *filename*.
+ Check if there is a breakpoint for *lineno* of *filename*.
-.. method:: Bdb.get_breaks(filename, lineno)
+ .. method:: get_breaks(filename, lineno)
- Return all breakpoints for *lineno* in *filename*, or an empty list if none
- are set.
+ Return all breakpoints for *lineno* in *filename*, or an empty list if
+ none are set.
-.. method:: Bdb.get_file_breaks(filename)
+ .. method:: get_file_breaks(filename)
- Return all breakpoints in *filename*, or an empty list if none are set.
+ Return all breakpoints in *filename*, or an empty list if none are set.
-.. method:: Bdb.get_all_breaks()
+ .. method:: get_all_breaks()
- Return all breakpoints that are set.
+ Return all breakpoints that are set.
-Derived classes and clients can call the following methods to get a data
-structure representing a stack trace.
+ Derived classes and clients can call the following methods to get a data
+ structure representing a stack trace.
-.. method:: Bdb.get_stack(f, t)
+ .. method:: get_stack(f, t)
- Get a list of records for a frame and all higher (calling) and lower frames,
- and the size of the higher part.
+ Get a list of records for a frame and all higher (calling) and lower
+ frames, and the size of the higher part.
-.. method:: Bdb.format_stack_entry(frame_lineno, [lprefix=': '])
+ .. method:: format_stack_entry(frame_lineno, [lprefix=': '])
- Return a string with information about a stack entry, identified by a
- ``(frame, lineno)`` tuple:
+ Return a string with information about a stack entry, identified by a
+ ``(frame, lineno)`` tuple:
- * The canonical form of the filename which contains the frame.
- * The function name, or ``"<lambda>"``.
- * The input arguments.
- * The return value.
- * The line of code (if it exists).
+ * The canonical form of the filename which contains the frame.
+ * The function name, or ``"<lambda>"``.
+ * The input arguments.
+ * The return value.
+ * The line of code (if it exists).
-The following two methods can be called by clients to use a debugger to debug a
-:term:`statement`, given as a string.
+ The following two methods can be called by clients to use a debugger to debug
+ a :term:`statement`, given as a string.
-.. method:: Bdb.run(cmd, [globals, [locals]])
+ .. method:: run(cmd, [globals, [locals]])
- Debug a statement executed via the :func:`exec` function. *globals*
- defaults to :attr:`__main__.__dict__`, *locals* defaults to *globals*.
+ Debug a statement executed via the :func:`exec` function. *globals*
+ defaults to :attr:`__main__.__dict__`, *locals* defaults to *globals*.
-.. method:: Bdb.runeval(expr, [globals, [locals]])
+ .. method:: runeval(expr, [globals, [locals]])
- Debug an expression executed via the :func:`eval` function. *globals* and
- *locals* have the same meaning as in :meth:`run`.
+ Debug an expression executed via the :func:`eval` function. *globals* and
+ *locals* have the same meaning as in :meth:`run`.
-.. method:: Bdb.runctx(cmd, globals, locals)
+ .. method:: runctx(cmd, globals, locals)
- For backwards compatibility. Calls the :meth:`run` method.
+ For backwards compatibility. Calls the :meth:`run` method.
-.. method:: Bdb.runcall(func, *args, **kwds)
+ .. method:: runcall(func, *args, **kwds)
- Debug a single function call, and return its result.
+ Debug a single function call, and return its result.
Finally, the module defines the following functions: