CODEWITHSUNDEEP
pythonpython-3.x
Breegan Andersen
Breegan Andersen

Reputation: 35

How to aggregate daily temperature data to use the months as keys in a dictionary for python?

I am a novice with python so forgive me if this seems simple and I can't figure it out...

For a homework assignment we are asked to "Write python code to read the daily temperature data for each month of the year. Make three dictionaries, MinT, AvgT, and MaxT each with the month number (1..12) as the key and a list of values for the minimum, maximum and average daily temperatures for each day in the corresponding month." I need to do this without using pandas and numpy, as those are the next questions for the assignment.

I am struggling to get started. I am trying to start with MinT to see if I could get the code to work, but have failed multiple times. So far I have...

import csv

weather = csv.DictReader(open(...))
MinT = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12}
min_t = []
for r in weather:
    min_t.append(float(r['LowT']))

The output is all of the minimum values for the year, but I'm unsure how to aggregate the daily data to where I can use the month as the key.

Any help would be appreciated.

Upvotes: 2

Views: 1460

Answers (2)

zelusp
zelusp

Reputation: 3678

Here's a self contained example using comprehensions:

from random import randint

def generate_temperatures():
    return [randint(60, 92) for day in range(randint(28, 31))]

# This simulates loading your data
annual_temperatures = {month_num + 1: generate_temperatures() for month_num in range(12)}

# This calculates the goods :)
avg_monthly_temperature = {month: sum(temp)/len(temp) for (month, temp) in annual_temperatures.items()}
min_monthly_temperature = {month: min(temp) for (month, temp) in annual_temperatures.items()}
max_monthly_temperature = {month: max(temp) for (month, temp) in annual_temperatures.items()}

Upvotes: 0

TheoretiCAL
TheoretiCAL

Reputation: 20571

To create a dictionary where they keys are the numeric months and the values will be lists, you want:

MinT = {1:[], 2:[], 3:[], 4:[], 5:[], 6:[], 7:[], 8:[], 9:[], 10:[], 11:[], 12:[]}

However this is easier to initialize with a loop:

MinT = {}
for x in range(12):
 MinT[x+1] = []

Or dictionary comprehension:

MinT = {month_num + 1: [] for month_num in range(12)}

Upvotes: 1

Related Questions