Exercise: MQTT: Publish User Records

Requirement

Write a program mqtt-pub-users-csv-noheader.py that

The program is supposed to be run like follows,

$ ./mqtt-pub-users-csv-noheader.py      # want usage message if wrong number of parameters given
  Usage: ./mqtt-pub-users-csv-noheader.py CSVFILENAME BROKER TOPIC
$ ./mqtt-pub-users-csv-noheader.py Users-noheader-cp1252.csv test.mosquitto.org my-users-topic

Dependencies

cluster_python Python Programming: From Absolute Beginner to Advanced Productivity cluster_python_exercises Exercises cluster_python_exercises_userdb User Database (Exercise Series) cluster_python_basics Python: The Language Fundamentals cluster_python_advanced Python: More Language Features cluster_python_misc Python: Miscellaneous Topics python_exercises_userdb_userdb_module Exercise: Refactoring - Extract Both CSV Formats Into Module python_exercises_userdb_csvdictreader_function Exercise: Refactoring - Extract CSV Reading Into Function (csv.dictreader) python_exercises_userdb_userdb_module->python_exercises_userdb_csvdictreader_function python_exercises_userdb_csvreader Exercise: Read CSV File (csv.reader) python_exercises_userdb_userdb_module->python_exercises_userdb_csvreader python_advanced_modules Modules and Packages python_exercises_userdb_userdb_module->python_advanced_modules python_exercises_userdb_csvdictreader Exercise: Read CSV File (csv.dictreader) python_exercises_userdb_csvdictreader_function->python_exercises_userdb_csvdictreader python_basics_python_0270_functions Functions python_exercises_userdb_csvdictreader_function->python_basics_python_0270_functions python_exercises_userdb_user_json Exercise: Convert User Record To JSON And Back python_exercises_userdb_user_json->python_exercises_userdb_userdb_module python_exercises_userdb_csvdictreader->python_exercises_userdb_csvreader python_basics_python_0139_commandline_argv Commandline Arguments (sys.argv) python_exercises_userdb_csvdictreader->python_basics_python_0139_commandline_argv python_misc_csv CSV Files python_exercises_userdb_csvdictreader->python_misc_csv python_exercises_userdb_csvreader->python_basics_python_0139_commandline_argv python_exercises_userdb_csvreader->python_misc_csv python_exercises_userdb_mqtt_publish_csv Exercise: MQTT: Publish User Records python_exercises_userdb_mqtt_publish_csv->python_exercises_userdb_user_json python_basics_python_0300_strings More About Strings python_basics_python_0150_datatypes_overview Datatypes python_basics_python_0300_strings->python_basics_python_0150_datatypes_overview python_basics_python_0200_sequential_types Sequential Datatypes python_basics_python_0300_strings->python_basics_python_0200_sequential_types python_basics_python_0250_refs_flat_deep_copy References, (Im)mutability python_basics_python_0300_strings->python_basics_python_0250_refs_flat_deep_copy python_basics_python_0130_syntax_etc Syntax etc. python_basics_python_0120_helloworld Hello World python_basics_python_0130_syntax_etc->python_basics_python_0120_helloworld python_basics_python_0110_blahblah Blahblah python_basics_python_0120_helloworld->python_basics_python_0110_blahblah python_basics_python_0220_for for Loops python_basics_python_0193_while while Loops python_basics_python_0220_for->python_basics_python_0193_while python_basics_python_0220_for->python_basics_python_0200_sequential_types python_basics_python_0139_commandline_argv->python_basics_python_0130_syntax_etc python_basics_python_0125_running Running Python Programs python_basics_python_0139_commandline_argv->python_basics_python_0125_running python_basics_python_0140_variables Variables python_basics_python_0140_variables->python_basics_python_0130_syntax_etc python_basics_python_0150_datatypes_overview_compound Compound Datatypes python_basics_python_0150_datatypes_overview_compound->python_basics_python_0150_datatypes_overview python_basics_python_0160_boolean Boolean python_basics_python_0160_boolean->python_basics_python_0150_datatypes_overview python_basics_python_0193_while->python_basics_python_0160_boolean python_basics_python_0170_if The if Statement python_basics_python_0193_while->python_basics_python_0170_if python_basics_python_0170_if->python_basics_python_0160_boolean python_basics_python_0150_datatypes_overview->python_basics_python_0140_variables python_basics_python_0270_functions->python_basics_python_0140_variables python_basics_python_0270_functions->python_basics_python_0150_datatypes_overview python_basics_python_0125_running->python_basics_python_0120_helloworld python_basics_python_0200_sequential_types->python_basics_python_0150_datatypes_overview_compound python_basics_python_0330_strings_encoding Strings and Encoding python_basics_python_0330_strings_encoding->python_basics_python_0300_strings python_basics_python_0250_refs_flat_deep_copy->python_basics_python_0140_variables python_basics_python_0250_refs_flat_deep_copy->python_basics_python_0150_datatypes_overview_compound python_basics_python_0250_refs_flat_deep_copy->python_basics_python_0150_datatypes_overview python_basics_python_0500_files File I/O python_basics_python_0500_files->python_basics_python_0220_for python_basics_python_0500_files->python_basics_python_0330_strings_encoding python_misc_csv->python_basics_python_0220_for python_misc_csv->python_basics_python_0150_datatypes_overview_compound python_misc_csv->python_basics_python_0500_files