Adds format option for read command

Author: cheqianh

amazon/ionbenchmark/ion_benchmark_cli.py

@@ -344,6 +344,21 @@ def reset_for_each_execution(each_option):
     return api, format_option
 
 
+def convert_file_to_desired_format(f, file):
+    if f == Format.ION_BINARY.value:
+        cf = open("converted_file", "wb")
+        with open(file, "br") as fp:
+            ion.dump(ion.load(fp, single_value=False), cf, binary=True)
+        return cf.name
+    elif f == Format.ION_TEXT.value:
+        cf = open("converted_file", "wb")
+        with open(file, "br") as fp:
+            ion.dump(ion.load(fp, single_value=False), cf, binary=False)
+        return cf.name
+    else:
+        raise Exception('Failed to convert file due to unknown format.')
+
+
 def ion_python_benchmark_cli(arguments):
     if arguments['--version'] or arguments['-v']:
         print(TOOL_VERSION)
@@ -372,6 +387,7 @@ def ion_python_benchmark_cli(arguments):
         for each_option in option_configuration_combination:
             # reset
             api, format_option = reset_for_each_execution(each_option)
+            converted_file = convert_file_to_desired_format(format_option, file)
 
             if not api or api == API.SIMPLE_ION.value:
                 read_micro_benchmark_function = read_micro_benchmark_simpleion
@@ -381,12 +397,10 @@ def ion_python_benchmark_cli(arguments):
                 raise Exception(f'Invalid API option {api}.')
 
             file_size, result_with_gc, conversion_time, read_memory_usage_peak = \
-                read_micro_benchmark_and_profiling(table, read_micro_benchmark_function, iterations, warmups, file,
-                                               c_extension, iterator, each_option)
+                read_micro_benchmark_and_profiling(table, read_micro_benchmark_function, iterations, warmups,
+                                                   converted_file, c_extension, iterator, each_option)
 
         print(tabulate(table, tablefmt='fancy_grid'))
-
-
     elif arguments['write']:
         # initialize benchmark report table
         table = identify_report_table('write')