Program a bug-free dependency

In the video, row_to_list() was mocked. But preprocess() has another dependency convert_to_int(). Generally, its best to mock all dependencies of the function under test. It's your job to mock convert_to_int() in this and the following exercises.

The raw data file used in the test is printed in the IPython console. The second row "1,767565,112\n" is dirty, so row_to_list() will filter it out. The rest will be converted to lists and convert_to_int() will process the areas and prices.

The mocked convert_to_int() should process these areas and prices correctly. Here is the dict holding the correct return values.

{"1,801": 1801, "201,411": 201411, "2,002": 2002, "333,209": 333209, "1990": None, "782,911": 782911, "1,285": 1285, "389129": None}

Define a function convert_to_int_bug_free() which takes one argument called comma_separated_integer_string.
Assign return_values to the dictionary holding the correct return values in the context of the raw data file used in the test.
Return the correct return value by looking up the dictionary return_values for the key comma_separated_integer_string.

Take Hint (-30 XP)

Exercise

Program a bug-free dependency

Instructions