[TD-2771] <feature>: python version taosdemo. fix --help.

tests/examples/python/taosdemo/README.md

@@ -6,27 +6,32 @@ run python version taosdemo
 ===
 Usage: ./taosdemo.py [OPTION...]
 
-        --help                   Show usage.
+Author: Shuduo Sang <sangshuduo@gmail.com>
+
+	-H, --help                         Show usage.
+
+	-N, --native                       flag, Use native interface if set. Default is using RESTful interface.
+	-h, --host <hostname>              host, The host to connect to TDengine. Default is localhost.
+	-p, --port <port>                  port, The TCP/IP port number to use for the connection. Default is 0.
+	-u, --user <username>              user, The user name to use when connecting to the server. Default is 'root'.
+	-P, --password <password>          password, The password to use when connecting to the server. Default is 'taosdata'.
+	-d, --dbname <dbname>              database, Destination database. Default is 'test'.
+	-a, --replica <replications>       replica, Set the replica parameters of the database, Default 1, min: 1, max: 5.
+	-m, --tbname <table prefix>        table_prefix, Table prefix name. Default is 't'.
+	-M, --supertable                   flag, Use super table. Default is no
+	-s, --stbname <stable prefix>      stable_prefix, STable prefix name. Default is 'st'
+	-Q, --query <DEFAULT | command>    query, Execute query command. set 'DEFAULT' means select * from each table
+	-T, --numOfThreads <number>        num_of_threads, The number of threads. Default is 1.
+	-P, --numOfProcesses <number>      num_of_processes, The number of threads. Default is 1.
+	-r, --numOfRecPerReq <number>      num_of_records_per_req, The number of records per request. Default is 1000.
+	-t, --numOfTb <number>             num_of_tables, The number of tables. Default is 1.
+	-n, --numOfRec <number>            num_of_records_per_table, The number of records per table. Default is 1.
+	-c, --config <path>                config_directory, Configuration directory. Default is '/etc/taos/'.
+	-x, --inserOnly                    flag, Insert only flag.
+	-O, --outOfOrder                   out of order data insert, 0: In order, 1: Out of order. Default is in order.
+	-R, --rateOOOO <number>            rate, Out of order data's rate--if order=1 Default 10, min: 0, max: 50.
+	-D, --deleteMethod <number>        Delete data methods 0: don't delete, 1: delete by table, 2: delete by stable, 3: delete by database.
+	-v, --verbose                      Print verbose output
+	-g, --debug                        Print debug output
+	-y, --skipprompt                   Skip read key for continous test, default is not skip
 
-        -h <hostname>            host, The host to connect to TDengine. Default is localhost.
-        -p <port>                port, The TCP/IP port number to use for the connection. Default is 0.
-        -u <username>            user, The user name to use when connecting to the server. Default is 'root'.
-        -P <password>            password, The password to use when connecting to the server. Default is 'taosdata'.
-        -d <dbname>              database, Destination database. Default is 'test'.
-        -a <replications>        replica, Set the replica parameters of the database, Default 1, min: 1, max: 5.
-        -m <table prefix>        table_prefix, Table prefix name. Default is 't'.
-        -M                       stable, Use super table.
-        -s <stable prefix>       stable_prefix, STable prefix name. Default is 'st'
-        -Q <DEFAULT | command>   query, Execute query command. set 'DEFAULT' means select * from each table
-        -T <number>              num_of_threads, The number of threads. Default is 10.
-        -r <number>              num_of_records_per_req, The number of records per request. Default is 1000.
-        -t <number>              num_of_tables, The number of tables. Default is 1.
-        -n <number>              num_of_records_per_table, The number of records per table. Default is 1.
-        -c <path>                config_directory, Configuration directory. Default is '/etc/taos/'.
-        -x                       flag, Insert only flag.
-        -O                       order, Insert mode--0: In order, 1: Out of order. Default is in order.
-        -R <number>              rate, Out of order data's rate--if order=1 Default 10, min: 0, max: 50.
-        -D <number>              Delete data methods 0: don't delete, 1: delete by table, 2: delete by stable, 3: delete by database.
-        -v                       Print verbose output
-        -g                       Print debug output
-        -y                       Skip read key for continous test, default is not skip

tests/examples/python/taosdemo/taosdemo.py

@@ -350,7 +350,7 @@ if __name__ == "__main__":
             'supertable', 'stbname', 'query', 'numOfThreads', 'numOfProcesses',
             'numOfRecPerReq', 'numbOfTb', 'numOfRec', 'config',
             'insertOnly', 'outOfOrder', 'rateOOOO','deleteMethod',
-            'verbose', 'debug', 'skipprompt', '--help'
+            'verbose', 'debug', 'skipprompt', 'help'
         ])
     except getopt.GetoptError as err:
         print('ERROR:', err)
@@ -371,6 +371,7 @@ if __name__ == "__main__":
             print('')
 
             print('\t-H, --help                         Show usage.')
+            print('')
 
             print('\t-N, --native                       flag, Use native interface if set. Default is using RESTful interface.')
             print('\t-h, --host <hostname>              host, The host to connect to TDengine. Default is localhost.')