Python datetime toordinal()用法及代碼示例

Python datetime.toordinal() 方法

datetime.toordinal() 方法用於操作模塊 datetime 的 datetime 類的對象。

它用於返回日期的預測格列高利序數，其中第 1 年的 1 月 1 日的序數為 1。如果第 1 年的 1 月 1 日的序數為 1，則第 1 年的 1 月 2 日的序數為 2，依此類推。它是一個實例方法，這意味著它適用於類的實例。

模塊：

    import datetime

類：

    from datetime import datetime

用法:

    toordinal()

參數：

• None

返回值：

此方法的返回類型是一個數字，它是該日期在公曆中的序數。

例：

## importing datetime class
from datetime import datetime

## Creating an instance
x = datetime(2020,10,27, 21, 5,27, 100)
d = x.toordinal()
print("Ordinal number of date ",x," is:", d)
print()

## Using today' date
x = datetime.now()
d = x.toordinal()
print("Ordinal number of date ",x," is:", d)
print()

x = datetime.today()
d = x.toordinal()
print("Ordinal number of date ",x," is:", d)
print()

x = datetime(1, 1, 1, 0,0,0,0)
d = x.toordinal()
print("Ordinal number of the earliest possible date allowed",x," is:", d)
print()

x = datetime(9999, 12, 31, 23, 59, 59)
d = x.toordinal()
print("Ordinal number of the largest maximum date allowed",x," is:", d)
print()

輸出

Ordinal number of date  2020-10-27 21:05:27.000100  is:737725

Ordinal number of date  2020-05-02 06:50:06.336005  is:737547

Ordinal number of date  2020-05-02 06:50:06.336068  is:737547

Ordinal number of the earliest possible date allowed 0001-01-01 00:00:00  is:1

Ordinal number of the largest maximum date allowed 9999-12-31 23:59:59  is:3652059

注意：日期時間對象的屬性應在給定範圍內，否則將顯示 ValueError。

例：

## importing datetime class
from datetime import datetime

## Creating an instance
x = datetime(99999, 1, 31)
d = x.toordinal()
print("Ordinal number of the date",x," is:", d)
print()

輸出

Traceback (most recent call last):
  File "main.py", line 5, in <module>
    x = datetime(99999, 1, 31)
ValueError:year 99999 is out of range