Hướng dẫn how do i get the iso week number in python? - làm cách nào để lấy số tuần iso trong python?

Tôi tóm tắt cuộc thảo luận thành hai bước:

1. Chuyển đổi định dạng thô thành đối tượng

   dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
   print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
   print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
   print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.
   

   5.
2. Sử dụng chức năng của đối tượng

   dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
   print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
   print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
   print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.
   

   5 hoặc đối tượng

   dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
   print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
   print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
   print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.
   

   7 để tính số tuần.

Ấm lên

from datetime import datetime, date, time
d = date(2005, 7, 14)
t = time(12, 30)
dt = datetime.combine(d, t)
print(dt)

Bước đầu tiên

Để tạo thủ công một đối tượng

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

Nhưng trong thực tế, chúng ta thường cần phải phân tích một chuỗi hiện có. Chúng ta có thể sử dụng hàm

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

Ngoài ra, một cách thuận tiện hơn là sử dụng mô -đun DateParse. Ví dụ là

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

Hai cách tiếp cận trên sẽ trả về một đối tượng

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Bước thứ 2

Sử dụng đối tượng

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

Python

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Thật khó để quyết định sử dụng định dạng nào. Một cách tốt hơn là lấy một đối tượng

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

Python

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object
d = dt.date() # convert to a date object. equivalent to d = date(2017,1,1), but date.strptime() don't have the parse function
year, week, weekday = d.isocalendar() 
print(year, week, weekday) # (2016,52,7) in the ISO standard

Thật khó để quyết định sử dụng định dạng nào. Một cách tốt hơn là lấy một đối tượng

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

Hình ảnh của Lukas, pexels.

6 phút để đọc

Trong thương mại điện tử và tiếp thị, nó tương đối phổ biến để sử dụng số tuần ISO khi báo cáo dữ liệu. Hệ thống Tuần lễ ISO là lịch Tuần lễ LEAP là một phần của tiêu chuẩn ngày và thời gian ISO 8601 từ Tổ chức Tiêu chuẩn hóa Quốc tế hoặc ISO.

Lịch Gregorian có một chu kỳ nhảy vọt sử dụng 97 ngày nhảy được phân phối trong khoảng thời gian 400 năm và chứa toàn bộ số 20871 tuần. Điều này có nghĩa là năm trung bình có 52.1775 tuần. Ngược lại, năm tuần ISO hoặc năm ISO, có 52 hoặc 53 tuần đầy đủ, với 364 hoặc 371 ngày, thay vì 365 hoặc 366 thông thường trong một năm lịch Gregorian.

ISO Weeks bắt đầu vào thứ Hai và kết thúc vào Chủ nhật, có xu hướng là cách phổ biến mà các doanh nghiệp đo lường hiệu suất giao dịch của họ. Để truy vấn cơ sở dữ liệu hoặc nền tảng phân tích web để trích xuất dữ liệu thương mại điện tử hoặc tiếp thị được liên kết với ISO Weeks, bạn sẽ cần có thể xác định ngày bắt đầu và ngày kết thúc cho một tuần ISO và diễn ra tuần ISO cho một ngày nhất định. Ở đây, cách làm thế nào để làm điều đó trong Python.

Cài đặt các gói

Mặc dù bạn có thể tính toán dữ liệu tuần ISO theo cách thủ công, nhưng có một gói Python hữu ích được gọi là

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

Tải các gói

Tiếp theo, nhập gói

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

import pandas as pd
from isoweek import Week

Nhận số tuần ISO cho một ngày

Đầu tiên, chúng tôi sẽ giải quyết cách tính toán tuần ISO cho một ngày nhất định bằng cách tạo một chức năng chúng tôi có thể sử dụng trong các dự án khác. Chúng tôi sẽ chuyển một chuỗi

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Requirement already satisfied: isoweek in /conda/envs/data-science-stack-2.5.1/lib/python3.7/site-packages (1.3.3)

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

import pandas as pd
from isoweek import Week

import pandas as pd
from isoweek import Week

def get_iso_week_from_date(date):
    """Return the ISO week from a date.

    Args:
        date (str): Date

    Returns:
        week (int): ISO week
    """
    date = pd.to_datetime(date)
    return date.isocalendar()[1]

week = get_iso_week_from_date('2022-02-28')
week

Nhận ngày bắt đầu cho một số tuần ISO

Tiếp theo, chúng tôi sẽ tạo ra một chức năng Python để tính toán ngày bắt đầu cho một tuần ISO đã cho bằng năm và số tuần ISO. Chúng tôi cũng sẽ thêm một đối số tùy chọn cho

import pandas as pd
from isoweek import Week

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Vì ISO Weeks bắt đầu vào thứ Hai và kết thúc vào Chủ nhật, chúng tôi có thể tính toán ngày bắt đầu cho một tuần ISO nhất định bằng cách chuyển các lập luận

import pandas as pd
from isoweek import Week

import pandas as pd
from isoweek import Week

import pandas as pd
from isoweek import Week

import pandas as pd
from isoweek import Week

import pandas as pd
from isoweek import Week

def get_iso_week_from_date(date):
    """Return the ISO week from a date.

    Args:
        date (str): Date

    Returns:
        week (int): ISO week
    """
    date = pd.to_datetime(date)
    return date.isocalendar()[1]

def get_start_date_of_isoweek(year, week, date_format='datetime'):
    """
    Get the start date of the given ISO week using isocalendar()

    Args:
        year (int): Year, i.e. 2022
        week (int): Week, i.e. 34
        date_format (string): Format of the returned date, default is datetime

    Returns:
        datetime.date: Start date of the given ISO week
    """
    
    if date_format == 'datetime':
        return Week(year, week).monday()
    else:
        return Week(year, week).monday().strftime(date_format)

start = get_start_date_of_isoweek(2022, 9)
start

datetime.date(2022, 2, 28)

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Nhận ngày kết thúc cho một số tuần ISO

Quá trình để có được ngày kết thúc trong một tuần ISO là giống nhau, nhưng thay vì thêm

import pandas as pd
from isoweek import Week

def get_iso_week_from_date(date):
    """Return the ISO week from a date.

    Args:
        date (str): Date

    Returns:
        week (int): ISO week
    """
    date = pd.to_datetime(date)
    return date.isocalendar()[1]

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

dt = datetime.strptime('2017-01-1','%Y-%m-%d') # return a datetime object. This day is Sunday
print(dt.strftime("%W")) # '00' Monday as the 1st day of the week. All days in a new year preceding the 1st Monday are considered to be in week 0.
print(dt.strftime("%U")) # '01' Sunday as the 1st day of the week. All days in a new year preceding the 1st Sunday are considered to be in week 0.
print(dt.strftime("%V")) # '52' Monday as the 1st day of the week. Week 01 is the week containing Jan 4.

Matt Clarke, Thứ Sáu, ngày 18 tháng 3 năm 2022

Tuần ISO là gì trong Python?

Tuần ISO là gì?