• Decoding Data App
  • Status
  • Module 3: Analyze Temperature
    • M3: Local Verification Instructions
    • M3: Task 1: Import HouseInfo
    • M3: Task 2: Create TempeartureData Class
    • M3: Task 3: Convert Temperature Data
    • M3: Task 4: Filter Temperature Data Records by Area
    • M3: Task 5: Return Transformed Temperature Data Records by Area
    • M3: Task 6: Filter Temperature Data Records by Date
    • M3: Task 7: Return Transformed Temperature Data Records by Date
    • M3: Task 8: Get Temperature Data by Area with sensor_app
    • M3: Task 8: Get Temperature Data by Date with sensor_app

Draft.

To test this module locally:

• Open a terminal at the root of the project
• Run the command pytest -k module3

In this module, you will create a TemperatureData class that will process the temperature data fields.

To start, open the file called temperature_info.py in the sensor folder.

At the top of the file, import HouseInfo from the house_info module.

Create a child class called TemperatureData that inherits the properties and methods from the HouseInfo class.

Still in the TemperatureData class, create a private method called _convert_data() with two parameters, self, and data. This method will help us convert the temperature data.

In the body of the _convert_area() method, create a variable called recs and set it to an empty list.

On a new line in the _convert_data method, create a for loop to iterate over data. Use rec as your iterator variable.

Note: The data input parameter is a list of strings. These strings are integers base 10 with the temperatures measurements. You should use the int() constructor to convert these numbers.

In the body of the for convert the rec string values to integers with base 10 and append them to recs.

Finally, your method should return recs (outside of the for loop, and the very end of the method).

Next, we are going to override get_data_by_area method from the parent class.

Create a method called get_data_by_area() with two parameters, self and rec_area. The rec_area parameter should have a default value of 0, which translates to all records. The purpose of this method is to filter the temperature data by the "area" field. In this method rec_area maps to the "area" data column.

In the body of the get_data_by_area() method, create a variable called recs and set it to the parent get_data_by_area method. Pass "temperature" as the first argument, and rec_area input parameter as the second argument. Hint: parent class methods can be access by using super.

Still in the get_data_by_area method, return a call to the _convert_data private method passing recs as the only argument.

Similarly, we are going to override get_data_by_date method from the parent class.

Still in the TemperatureData class, create another method called get_data_by_date() with two parameters, self, and rec_date. The rec_date parameter should have a default value to today's day. You can accomplish this using the date module. The purpose of this method is to filter the temperature data by the "date" field. In this method, rec_date maps to the "date" data column.

At the top of the file, import date and datetime from the datetime module. See date information and datetime information

In the body of the get_data_by_date() method, create a variable called recs and set it to the parent get_data_by_date method. Pass "temperature" as the first input argument, and rec_date input parameter as the second argument. Hint: parent class methods can be accss by using super.

Still in the get_data_by_date method, return a call to the _convert_data private method passing recs as the only argument.

Open the sensor_app.py file in the sensor directory. At the top of the file, from the temperature_info module, import the TemperatureData.

At the bottom of the file, create an instance of the TemperatureData class, and assign it to a variable named temperature_data. Pass data as the input argument to the TemperatureData constructor.

Next, create a variable called recs and set it to the get_data_by_area() method of the temperature_data object. The get_data_by_area() method should take rec_area=1 as the only argument.

Print the length of the recs list, also, print the maximum and minimum values in the recs list.

print("\nHouse Temperature sensor records for area 1 = {}".format(len(recs)))
print("\tMaximum: {0}, Minimum: {1} temperatures".format(max(recs), min(recs)))

To preview your app, open a terminal at the root of the project and run the following command:

python sensor/sensor_app.py

Sample output does not includes previous tasks:

... # previous output

House Temperature sensor records for area 1 = 1000
        Maximum: 80, Minimum: 60 temperatures

FYI: the app will not validate your print() statements.

Still in the sensor_app file, set the recs variable to the return value of get_data_by_date() method of the temperature_data object. The method takes rec_date=test_date as the only argument.

Print the test_date using the strftime() passing "%m/%d/%y" as the first argument, and the length of the recs list. Also print the maximum and minimum values in the recs list.

print("\nHouse Temperature sensor records for area 1 = {}".format(len(recs)))
print("\tMaximum: {0}, Minimum: {1} temperatures".format(max(recs), min(recs)))

To preview your app, open a terminal at the root of the project and run the following command:

python sensor/sensor_app.py

Sample output does not includes previous tasks:

...

House Temperature sensor records for area 1 = 1000
        Maximum: 80, Minimum: 60 temperatures

House Temperature sensor records for date: 05/09/20 = 20
        Maximum: 82, Minimum: 80 temperatures

FYI: the app will not validate your print() statements.