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(Pdb)
</source>
Now you are in the Python debugging mode with the Python script "a1_template.py" loaded. The (Pdb) prompt shown at the beginning of the line indicates that the Python interpreter is running under the debugging mode.
You can type the word "help" without open or close bracket to get a list of debugging commands:
<source>
(Pdb) help
(Pdb) help
Documented commands (type help <topic>):
========================================
EOF c d h list q rv undisplay
a cl debug help ll quit s unt
alias clear disable ignore longlist r source until
args commands display interact n restart step up
b condition down j next return tbreak w
break cont enable jump p retval u whatis
bt continue exit l pp run unalias where
Miscellaneous help topics:
==========================
exec pdb
(Pdb)
<source>
There are quite a bit of commands to get familiar with. However, we only need to learn a few to get started. Here are the ones that you should know: l, ll, n, s, and b
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(Pdb) help l
l(ist) [first [,last] | .]
List source code for the current file. Without arguments,
list 11 lines around the current line or continue the previous
listing. With . as argument, list 11 lines around the current
line. With one argument, list 11 lines starting at that line.
With two arguments, list the given range; if the second
argument is less than the first, it is a count.
The current line in the current frame is indicated by "->".
If an exception is being debugged, the line where the
exception was originally raised or propagated is indicated by
">>", if it differs from the current line.
(Pdb) help ll
longlist | ll
List the whole source code for the current function or frame.
(Pdb) help n
n(ext)
Continue execution until the next line in the current function
is reached or it returns.
(Pdb) help s
s(tep)
Execute the current line, stop at the first possible occasion
(either in a function that is called or in the current
function).
(Pdb) help b
b(reak) [ ([filename:]lineno | function) [, condition] ]
Without argument, list all breaks.
With a line number argument, set a break at this line in the
current file. With a function name, set a break at the first
executable line of that function. If a second argument is
present, it is a string specifying an expression which must
evaluate to true before the breakpoint is honored.
The line number may be prefixed with a filename and a colon,
to specify a breakpoint in another file (probably one that
hasn't been loaded yet). The file is searched for on
sys.path; the .py suffix may be omitted.
(Pdb)
<source>
