""" Module to demonstrate functions on nested dictionaries.

This module uses the data in the file 'weather.json'. This module does not need to worry about reading and opening the file -- test.py does that. However, you should look at that file to familiarize your self with the data format.

In that file weather is a dictionary whose keys are timestamps (year,month,day,hour,etc.) and whose values are weather reports. For example, here is an example of a (small portion of) a weather dictionary: { "2017-04-21T08:00:00-04:00": { "visibility": { "prevailing": 10.0, "units": "SM" }, "wind": { "speed": 13.0, "crosswind": 2.0, "units": "KT" }, "temperature": { "value": 13.9, "units": "C" }, "sky": [ { "cover": "clouds", "type": "broken", "height": 700.0, "units": "FT" } ], "code": "201704211056Z" }, "2017-04-21T07:00:00-04:00": { "visibility": { "prevailing": 10.0, "units": "SM" }, "wind": { "speed": 13.0, "crosswind": 2.0, "units": "KT" }, "temperature": { "value": 57.0, "units": "F" }, "sky": [ { "type": "overcast", "height": 700.0, "units": "FT" } ], "code": "201704210956Z" } ... }, The contents of interest in this module is the nested "temperature" dictionary.

IMPORTANT: Not all weather reports contain a temperature measurement.

"""

# Helper to use in function below def to_celsius(x): """ Returns x converted to celsius

The value returned has type float.

Parameter x: the temperature in fahrenheit Precondition: x is a number """ return 5*(x-32)/9.0

# Implement this function def reports_above_temp(weather,temp): """ Returns the number of weather reports where temperature is above temp (in Celsius) The parameter weather contains a weather report dictionary. This function loops through the weather reports and counts all reports for which (1) the report has a temperature measurement (not all reports do) (2) the measured temperature is properly above temp in Celsius A temperature measurement is itself a dictionary with two keys: 'value' and 'units'. For example: "temperature": { "value": 57.0, "units": "F" } The units are always either 'F' for fahrenheit or 'C' for celsius. If the measurement is in fahrenheit, the value will need to be converted before it can be compared to temp. Parameter weather: the weather dictionary Precondition: weather has the format described in the module introduction Parameter temp: the temperature in celsius Precondition: temp is a float """ pass