Python入门：Date Processing

Code

## 1. The time module ##

import time
current_time = time.time()

## 2. Converting timestamps ##

import time

current_time = time.time()

current_struct_time = time.gmtime(current_time)

current_hour = current_struct_time.tm_hour

print(current_hour)

## 3. UTC ##

import datetime

current_datetime = datetime.datetime.now()

current_year = current_datetime.year

current_month = current_datetime.month

## 4. Timedelta ##

import datetime

today = datetime.datetime.now()

diff = datetime.timedelta(days=1)

tomorrow = today + diff
yesterday = today - diff

## 5. Formatting dates ##

import datetime

mystery_date_formatted_string = mystery_date.strftime("%I:%M%p on %A %B %d, %Y")
print(mystery_date_formatted_string)

## 6. Parsing dates ##

import datetime

mystery_date = datetime.datetime.strptime(mystery_date_formatted_string, "%I:%M%p on %A %B %d, %Y")

## 8. Reformatting our data ##

import datetime

for row in posts:
    timestamp = float(row[2])
    row[2] = datetime.datetime.fromtimestamp(timestamp)

## 9. Counting posts in March ##

march_count = 0

for row in posts:
    if row[2].month == 3:
        march_count += 1

## 10. Counting posts in any month ##

march_count = 0

for row in posts:
    if row[2].month == 3:
        march_count += 1
        
def count_posts_in_month(month):
    month_count = 0
    for row in posts:
        if row[2].month == month:
            month_count += 1
    return month_count
    
feb_count = count_posts_in_month(2)

aug_count = count_posts_in_month(8)

Links

1. https://docs.python.org/3/library/datetime.html#strftime-and-strptime-behavior