keyword function always goes after a none keyword argument.
every function deserves a docstring, which must be the first thing destined
in a function.
when importing a module, python looks in directories defined in
sys. path. By using sys.path.insert() you’ll add a new directory,
but the effect lasts as long as python is running
indenting starts a block and unindenting ends it.
traceback: if one function doesn’t handle an exception,
it is passed to the calling function. if the exception is
never handled, your program will crash and Python will print
a ‘traceback’ to standard error.
unlike C, python doesn’t support inline assignment.