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lines 5-34 of file: python/dismod_at/log_command.py
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# {xrst_begin python_log_command}
# {xrst_comment_ch #}
#
# Log A Python Command
# ####################
#
# Prototype
# *********
# {xrst_literal
#     # BEGIN_PROTOTYPE
#     # END_PROTOTYPE
# }
#
# begin_end
# *********
# is this the beginning or end of a command.
#
# database
# is the database that this command acts on.
#
# command_name
# ************
# is the name of this command; e.g., db2csv.
#
# arg_list
# ********
# Is the argument list for this command starting with
# arg_list[0] which is the dismod_at database for this command.
#
# {xrst_end python_log_command}