sequence of ordered numbers in python3

Question

I would like to generate sequence of ordered numbers which is of same length of some other list. I have tried

def parse_data_from_file(filename):
    times = []
    temperatures = []

    with open(filename) as csvfile:
        reader = csv.reader(csvfile, delimiter=',')
        next(reader)
        
        for row in reader:
            times.append(row[0])
            temperatures.append(float(row[1]))
            
    return times, temperatures

The issue is time is not getting represnted properly on x-axis as attached here:

Answer 1

You haven't said how you're making the plots. I'll assume you're using matplotlib , which is probably the most popular plotting package for Python.

I know that when I'm working with dates or times, I usually use datetime.strptime() to get the data into a datetime format that Python likes:

from datetime import datetime

# assume your date info looks like 08-Jun-2022 14:22:22
dt = datetime.strptime(row[0], '%d-%b-%Y %H:%M:%S')
times.append(dt)

Matplotlib has a convenience function date2num that converts a datetime object to a format that it likes to use. Their official example is here . Here is an even shorter example for you:

import matplotlib.pyplot as plt
import matplotlib.dates as mdates
import matplotlib

fig, ax = plt.subplots()
t = matplotlib.dates.date2num(times)
y = temperatures
ax.plot(t, y)
ax.xaxis.set_major_locator(mdates.MonthLocator(bymonth=(1, 7)))