datetime_zero = datetime.datetime.utcnow()

datetime_first = datetime.datetime.today()

datetime_second = datetime.datetime.now()

datetime_three = datetime.datetime(year=1, month=1, day=1, hour=0, minute=0, second=0, microsecond=1)
datetime_four = datetime.datetime(year=9999, month=12, day=31, hour=23, minute=59, second=59, microsecond=999999)
datetime_five = datetime.datetime(9999, 12, 31, 23, 59, 59, 999999)

print(datetime_zero, type(datetime_zero))       # 2022-07-09 18:12:43.486469 <class 'datetime.datetime'>
print(datetime_first, type(datetime_first))     # 2022-07-09 18:12:43.486469 <class 'datetime.datetime'>
print(datetime_second, type(datetime_second))   # 2022-07-09 18:12:43.486469 <class 'datetime.datetime'>
print(datetime_three, type(datetime_three))     # 0001-01-01 00:00:00.000001 <class 'datetime.datetime'>
print(datetime_four, type(datetime_four))       # 9999-12-31 23:59:59.999999 <class 'datetime.datetime'>
print(datetime_five, type(datetime_five))       # 9999-12-31 23:59:59.999999 <class 'datetime.datetime'>

print(datetime.datetime.min)        # 0001-01-01 00:00:00
print(datetime.datetime.max)        # 9999-12-31 23:59:59.999999

datetime_first = datetime.datetime.today()
"""# 從日期時(shí)間對(duì)象中獲取日期屬性【年-月-日】"""
new_time = datetime.datetime.date(datetime_first)
print(new_time)
print(type(new_time))
"""# 從日期時(shí)間對(duì)象中獲取時(shí)間屬性【時(shí)：分：秒：微秒】"""
new_time = datetime.datetime.time(datetime_first)
print(new_time)
print(type(new_time))
"""# 從日期時(shí)間對(duì)象中獲取年份"""
datetime_year = datetime_first.year
print(datetime_year, type(datetime_year))       # 2022 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取月份"""
datetime_month = datetime_first.month
print(datetime_month, type(datetime_month))       # 7 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取天"""
datetime_day = datetime_first.day
print(datetime_day, type(datetime_day))       # 10 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取小時(shí)"""
datetime_hour = datetime_first.hour
print(datetime_hour, type(datetime_hour))       # 18 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取分鐘"""
datetime_minute = datetime_first.minute
print(datetime_minute, type(datetime_minute))       # 56 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取秒數(shù)"""
datetime_second = datetime_first.second
print(datetime_second, type(datetime_second))       # 16 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取微秒"""
datetime_microsecond = datetime_first.microsecond
print(datetime_microsecond, type(datetime_microsecond))       # 735264 <class 'int'>

UTCDateTime = datetime.datetime(year=2022, month=7, day=10, hour=19, minute=14, second=27, microsecond=1235)
datetime_UTCTimeTuple = datetime.datetime.utctimetuple(UTCDateTime)
print(datetime_UTCTimeTuple, type(datetime_UTCTimeTuple))  # 類(lèi)型為：<class 'time.struct_time'>

datetime_replace = datetime.datetime(year=2022, month=7, day=9, hour=19, minute=14, second=27, microsecond=123)
datetime_ordinal = datetime.datetime.toordinal(datetime_replace)
print(datetime_ordinal, type(datetime_ordinal))     # 738345 <class 'int'>
print(datetime.datetime.fromordinal(1))     # 0001-01-02 00:00:00
print(datetime.datetime.fromordinal(2))     # 0001-01-02 00:00:00
datetime_replace_max = datetime.datetime(year=9999, month=12, day=31, hour=23, minute=59, second=59, microsecond=999999)
print(datetime.datetime.toordinal(datetime_replace_max))
print(datetime.datetime.fromordinal(3652060))

datetime_replace = datetime.datetime(year=2022, month=7, day=9, hour=19, minute=14, second=27, microsecond=123)
print(datetime_replace)
ctime_datetime = datetime.datetime.ctime(datetime_replace)
print(ctime_datetime, type(ctime_datetime))
```
![Python標(biāo)準(zhǔn)庫(kù)datetime之datetime模塊詳解_date_07](https://img-blog.csdnimg.cn/b7e257debb0249ca84463b9d73d7dbf1.png)
## 7、日期時(shí)間對(duì)象轉(zhuǎn)換為時(shí)間戳
```python
datetime_timestamp = datetime.datetime.timestamp(datetime_replace)
print(datetime_timestamp, type(datetime_timestamp))         # 1657365267.000123 <class 'float'>
```
![Python標(biāo)準(zhǔn)庫(kù)datetime之datetime模塊詳解_datetime_08](https://img-blog.csdnimg.cn/e38e2a5be32242c5a79441e7300e2fc2.png)
## 8、時(shí)間戳轉(zhuǎn)換為日期時(shí)間對(duì)象
```python
print(datetime.datetime.fromtimestamp(datetime_timestamp))  # 2022-07-09 19:14:27.000123
```
![Python標(biāo)準(zhǔn)庫(kù)datetime之datetime模塊詳解_datetime_08](https://img-blog.csdnimg.cn/e38e2a5be32242c5a79441e7300e2fc2.png)
## 9、日期時(shí)間對(duì)象轉(zhuǎn)換為時(shí)間元組
```python
datetime_timetuple = datetime.datetime.timetuple(datetime_replace)
print(datetime_timetuple, type(datetime_timetuple))
```
![Python標(biāo)準(zhǔn)庫(kù)datetime之datetime模塊詳解_datetime_08](https://img-blog.csdnimg.cn/e38e2a5be32242c5a79441e7300e2fc2.png)
## 10、ISO標(biāo)準(zhǔn)日期時(shí)間格式
ISO標(biāo)準(zhǔn)的日歷時(shí)間,Calendar中文釋義為日歷
* 各個(gè)值的含義為(年份、周數(shù)、周內(nèi)的第N天)即(year, week, weekday);
* weekday的值為[1,7],1代表周一,7代表周日
* 示例:datetime.IsoCalendarDate(year=2022, week=27, weekday=7)
```python
datetime_replace = datetime.datetime(year=2022, month=7, day=9, hour=19, minute=14, second=27, microsecond=123)
UTCDateTime = datetime.datetime(year=2022, month=7, day=10, hour=19, minute=14, second=27, microsecond=1235)
# ISO標(biāo)準(zhǔn)日期時(shí)間格式
print(datetime.datetime.utcoffset(UTCDateTime))
# 將日期時(shí)間對(duì)象轉(zhuǎn)換為ISO標(biāo)準(zhǔn)日期時(shí)間格式的字符串
UTC_ISO_DateTime = datetime.datetime.isoformat(UTCDateTime)
print(UTC_ISO_DateTime, type(UTC_ISO_DateTime))         # 2022-07-10T19:14:27.001235 <class 'str'>
# 將ISO標(biāo)準(zhǔn)日期時(shí)間格式的字符串轉(zhuǎn)換為日期時(shí)間類(lèi)型
From_UTC_ISO_DateTime = datetime.datetime.fromisoformat('9999-12-31T23:59:59.999999')   # <class 'datetime.datetime'>
print(From_UTC_ISO_DateTime, type(From_UTC_ISO_DateTime))
# ISO標(biāo)準(zhǔn)的周內(nèi)第N天
# 值的范圍是[1,7],1代表周一,7代表周日
UTC_ISO_WeekDateTime = datetime.datetime.isoweekday(UTCDateTime)
print(UTC_ISO_WeekDateTime, type(UTC_ISO_WeekDateTime))     # 7 <class 'int'>
# ISO標(biāo)準(zhǔn)的日歷時(shí)間,Calendar中文釋義為日歷
# 各個(gè)值的含義為(年份、周數(shù)、周內(nèi)的第N天)即(year, week, weekday);
# weekday的值為[1,7],1代表周一,7代表周日
# 示例:datetime.IsoCalendarDate(year=2022, week=27, weekday=7)
UTC_ISO_CalendarDateTime = datetime.datetime.isocalendar(UTCDateTime)
print(UTC_ISO_CalendarDateTime, type(UTC_ISO_CalendarDateTime))
# 將ISO標(biāo)準(zhǔn)日歷格式的字符串轉(zhuǎn)換為時(shí)間日期型
From_UTC_ISO_CalendarDateTime = datetime.datetime.fromisocalendar(year=2022, week=27, day=7)
print(From_UTC_ISO_CalendarDateTime)        # 2022-07-10 00:00:00
print(type(From_UTC_ISO_CalendarDateTime))  # <class 'datetime.datetime'>
```
![Python標(biāo)準(zhǔn)庫(kù)datetime之datetime模塊詳解_python_11](https://img-blog.csdnimg.cn/bb944815182d477a9a662862f13a9f3a.png)
## 11、日期時(shí)間替換函數(shù)replace()
*  replace()可以只替換日期時(shí)間屬性的某一項(xiàng)
* replace()函數(shù)的第一個(gè)參數(shù)必傳
* replace()函數(shù)的第一個(gè)參數(shù)是一個(gè)日期時(shí)間類(lèi)型(datetime.datetime)的對(duì)象
* 按關(guān)鍵字傳參替換
* 按位置傳參體換
```python
datetime_replace = datetime.datetime(year=2022, month=7, day=9, hour=19, minute=14, second=27, microsecond=123)
# 初始值
print(f"datetime_replace的原值為：{datetime_replace}", f"類(lèi)型是：{type(datetime_replace)}")
# 不傳參數(shù)
print(datetime.datetime.replace(datetime_replace))    # 2022-07-09 19:14:27.000123
# 只替換年份
print(datetime.datetime.replace(datetime_replace, 2019))    # 2019-07-09 19:14:27.000123
print(datetime.datetime.replace(datetime_replace, year=2019))   # 2019-07-09 19:14:27.000123
# 只替換月份, 替換其他參數(shù)同理
print(datetime.datetime.replace(datetime_replace, month=12))            # 2022-12-09 19:14:27.000123
print(datetime.datetime.replace(datetime_replace, datetime_replace.year, 12))   # 2022-12-09 19:14:27.000123
# 替換其他參數(shù)同理
print(datetime.datetime.replace(datetime_replace, year=2019, month=12, day=31, hour=15,
                                minute=13, second=15, microsecond=9999))    # 2019-12-31 15:13:15.009999
```
![Python標(biāo)準(zhǔn)庫(kù)datetime之datetime模塊詳解_date_12](https://img-blog.csdnimg.cn/4ed28241d33b4928b3a8b2132b08a7d6.png)
## 12、日期時(shí)間對(duì)象格式化strftime()
* 日期時(shí)間對(duì)象格式化常用的格式如下
* %H(兩位數(shù)的小時(shí))
* %M(兩位數(shù)的分鐘)
* %S(兩位數(shù)的秒)
* %f(6位數(shù)的微秒)
* %h(簡(jiǎn)寫(xiě)的月份名,一般為英文簡(jiǎn)寫(xiě))
* %y(兩位數(shù)的年份)
* %Y(四位數(shù)的年份)
* %m(兩位數(shù)的月份)
* %d(兩位數(shù)的天數(shù))
* 可以只格式化部分屬性
```python
datetime_replace = datetime.datetime(year=2022, month=7, day=9, hour=19, minute=14, second=27, microsecond=123)
# 可以只格式化部分屬性
datetime_str = datetime.datetime.strftime(datetime_replace, "%Y-%m-%d %H:%M:%S.%f")
print(f"格式化后是：{datetime_str}", type(datetime_str))      # 2022-07-09 19:14:27.000123 <class 'str'>
# 格式化日期屬性
datetime_str_date = datetime.datetime.strftime(datetime_replace, "%Y-%m-%d")
print(f"格式化日期的值為：{datetime_str_date}")      # 2022-07-09
# 格式時(shí)間屬性
datetime_str_time = datetime.datetime.strftime(datetime_replace, "%H:%M:%S.%f")
print(f"格式化時(shí)間的值為：{datetime_str_time}")      # 19:14:27.000123
```
![Python標(biāo)準(zhǔn)庫(kù)datetime之datetime模塊詳解_datetime_13](https://img-blog.csdnimg.cn/4d9da4de3f464f1ca73e30f918406a0a.png)
## 附錄、完整代碼
```python
# coding:utf-8
import datetime
# 日期時(shí)間對(duì)象
# 日期時(shí)間對(duì)象是指具有日期(年月日)和時(shí)間(時(shí)分秒)雙重屬性的實(shí)例
# 日期時(shí)間對(duì)象的類(lèi)型為datetime.datetime
# 日期時(shí)間對(duì)象常用的屬性有年、月、日、時(shí)、分、秒、微秒等
# 日期時(shí)間對(duì)象可以指定時(shí)間創(chuàng)建,也可以通過(guò)獲取當(dāng)前時(shí)間來(lái)創(chuàng)建
# 日期時(shí)間對(duì)象指定時(shí)間創(chuàng)建時(shí)可按位置傳參創(chuàng)建,也可關(guān)鍵字傳參創(chuàng)建
# 日期時(shí)間對(duì)象的創(chuàng)建函數(shù)有datetime.datetime(),datetime.datetime.now()、datetime.datetime.today()、datetime.datetime.utcnow()
# 日期時(shí)間對(duì)象通過(guò)datetime.datetime()創(chuàng)建時(shí)的參數(shù)依次為：year,month,day,hour,minute,second,microsecond
# 日期時(shí)間對(duì)象通過(guò)datetime.datetime.now()函數(shù)創(chuàng)建不需要參數(shù)
# 日期時(shí)間對(duì)象通過(guò)datetime.datetime.today()函數(shù)創(chuàng)建不需要參數(shù)
# 日期時(shí)間對(duì)象通過(guò)datetime.datetime.utcnow()函數(shù)創(chuàng)建不需要參數(shù)
# 日期時(shí)間對(duì)象通過(guò)datetime.datetime()創(chuàng)建時(shí)至少應(yīng)該包含年月日三個(gè)參數(shù)
# 日期時(shí)間對(duì)象通過(guò)datetime.datetime()創(chuàng)建時(shí)的參數(shù)范圍如下
# {year[1~9999]、month[1~12]、day[1~31]、hour[0~23]、minute[0~59]、second[0~59]、microsecond[1~999999]}

# 通過(guò)datetime.datetime.utcnow()創(chuàng)建
datetime_zero = datetime.datetime.utcnow()
# 通過(guò)datetime.datetime.today()函數(shù)創(chuàng)建
datetime_first = datetime.datetime.today()
# 通過(guò)datetime.datetime.now()創(chuàng)建
datetime_second = datetime.datetime.now()
# 通過(guò)datetime.datetime()函數(shù)指定日期時(shí)間、關(guān)鍵字傳參創(chuàng)建
datetime_three = datetime.datetime(year=1, month=1, day=1, hour=0, minute=0, second=0, microsecond=1)
datetime_four = datetime.datetime(year=9999, month=12, day=31, hour=23, minute=59, second=59, microsecond=999999)
# 通過(guò)datetime.datetime()函數(shù)指定日期時(shí)間、按位置傳參創(chuàng)建,順序不可變且參數(shù)值必須在規(guī)定的范圍內(nèi)
datetime_five = datetime.datetime(9999, 12, 31, 23, 59, 59, 999999)
print(datetime_zero, type(datetime_zero))       # 2022-07-09 18:12:43.486469 <class 'datetime.datetime'>
print(datetime_first, type(datetime_first))     # 2022-07-09 18:12:43.486469 <class 'datetime.datetime'>
print(datetime_second, type(datetime_second))   # 2022-07-09 18:12:43.486469 <class 'datetime.datetime'>
print(datetime_three, type(datetime_three))     # 0001-01-01 00:00:00.000001 <class 'datetime.datetime'>
print(datetime_four, type(datetime_four))       # 9999-12-31 23:59:59.999999 <class 'datetime.datetime'>
print(datetime_five, type(datetime_five))       # 9999-12-31 23:59:59.999999 <class 'datetime.datetime'>
# 查看datetime可以處理的最大的日期時(shí)間對(duì)象及最小的日期時(shí)間對(duì)象
print(datetime.datetime.min)        # 0001-01-01 00:00:00
print(datetime.datetime.max)        # 9999-12-31 23:59:59.999999

"""# 從日期時(shí)間對(duì)象中獲取日期屬性【年-月-日】"""
new_time = datetime.datetime.date(datetime_first)
print(new_time)
print(type(new_time))
"""# 從日期時(shí)間對(duì)象中獲取時(shí)間屬性【時(shí)：分：秒：微秒】"""
new_time = datetime.datetime.time(datetime_first)
print(new_time)
print(type(new_time))
"""# 從日期時(shí)間對(duì)象中獲取年份"""
datetime_year = datetime_four.year
print(datetime_year, type(datetime_year))       # 9999 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取月份"""
datetime_month = datetime_four.month
print(datetime_month, type(datetime_month))       # 12 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取天"""
datetime_day = datetime_four.day
print(datetime_day, type(datetime_day))       # 31 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取小時(shí)"""
datetime_hour = datetime_four.hour
print(datetime_hour, type(datetime_hour))       # 23 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取分鐘"""
datetime_minute = datetime_four.minute
print(datetime_minute, type(datetime_minute))       # 59 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取秒數(shù)"""
datetime_second = datetime_four.second
print(datetime_second, type(datetime_second))       # 59 <class 'int'>
"""# 從日期時(shí)間對(duì)象中獲取微秒"""
datetime_microsecond = datetime_four.microsecond
print(datetime_microsecond, type(datetime_microsecond))       # 999999 <class 'int'>
"""# datetime.datetime.date()函數(shù)的參數(shù)只能是datetime.datetime類(lèi)型"""
date_time = datetime.date(2022, 12, 26)
"""# 傳入的參數(shù)不能為datetime.date類(lèi)型"""
"""# TypeError: descriptor 'date' for 'datetime.datetime' objects doesn't apply to a 'datetime.date' object"""
"""# print(datetime.datetime.date(date_time))"""
time_time = datetime.time(12, 2, 54, 999999)
"""# 傳入的參數(shù)不能為datetime.time類(lèi)型"""
"""# TypeError: descriptor 'date' for 'datetime.datetime' objects doesn't apply to a 'datetime.time' object"""
"""# print(datetime.datetime.date(time_time))"""
"""# 同理,datetime.datetime.time()函數(shù)傳入的參數(shù)亦不能為datetime.date類(lèi)型和datetime.time類(lèi)型"""
"""# TypeError: descriptor 'time' for 'datetime.datetime' objects doesn't apply to a 'datetime.date' object"""
"""# print(datetime.datetime.time(date_time))"""
"""# TypeError: descriptor 'time' for 'datetime.datetime' objects doesn't apply to a 'datetime.time' object"""
"""# print(datetime.datetime.time(time_time))"""
# 將日期時(shí)間對(duì)象轉(zhuǎn)換為時(shí)間元組類(lèi)型
# 時(shí)間元組是指具有 年份、月份、日、小時(shí)、分鐘、秒數(shù)、星期中的第N天、年中的第N天、夏令時(shí)標(biāo)志的一個(gè)元組對(duì)象
# 時(shí)間元組示例：(tm_year=2022, tm_mon=7, tm_mday=9, tm_hour=19, tm_min=14, tm_sec=27, tm_wday=5, tm_yday=190, tm_isdst=0)
# 其中tm_wday的值從0開(kāi)始,范圍是:0~6,0為星期一,6為星期日;tm_isdst=0代表未啟用夏令時(shí)
UTCDateTime = datetime.datetime(year=2022, month=7, day=10, hour=19, minute=14, second=27, microsecond=1235)
datetime_UTCTimeTuple = datetime.datetime.utctimetuple(UTCDateTime)
print(datetime_UTCTimeTuple, type(datetime_UTCTimeTuple))  # 類(lèi)型為：<class 'time.struct_time'>
# 將日期時(shí)間對(duì)象轉(zhuǎn)化為公元?dú)v開(kāi)始計(jì)數(shù)的天數(shù)
datetime_replace = datetime.datetime(year=2022, month=7, day=9, hour=19, minute=14, second=27, microsecond=123)
datetime_ordinal = datetime.datetime.toordinal(datetime_replace)
print(datetime_ordinal, type(datetime_ordinal))     # 738345 <class 'int'>
print(datetime.datetime.fromordinal(1))     # 0001-01-02 00:00:00
print(datetime.datetime.fromordinal(2))     # 0001-01-02 00:00:00
# ctime()是將日期時(shí)間類(lèi)型轉(zhuǎn)換為一個(gè)日期之間值的字符串,示例如 Sat Jul  9 19:14:27 2022(2022年7月9日星期六)
# ctime()返回值的第一部分的值代表星期幾,第二部分的值代表月份,第三部分的值代表日,第四部分的值代表時(shí)間,第五部分的值代表年份
print(datetime_replace)
ctime_datetime = datetime.datetime.ctime(datetime_replace)
print(ctime_datetime, type(ctime_datetime))

# 將日期時(shí)間對(duì)象轉(zhuǎn)換為時(shí)間戳
datetime_timestamp = datetime.datetime.timestamp(datetime_replace)
print(datetime_timestamp, type(datetime_timestamp))         # 1657365267.000123 <class 'float'>
# 將時(shí)間戳轉(zhuǎn)換為日期時(shí)間對(duì)象
print(datetime.datetime.fromtimestamp(datetime_timestamp))  # 2022-07-09 19:14:27.000123

# 將日期時(shí)間對(duì)象轉(zhuǎn)換為時(shí)間元組
datetime_timetuple = datetime.datetime.timetuple(datetime_replace)
print(datetime_timetuple, type(datetime_timetuple))
# ISO標(biāo)準(zhǔn)日期時(shí)間格式
print(datetime.datetime.utcoffset(UTCDateTime))
# 將日期時(shí)間對(duì)象轉(zhuǎn)換為ISO標(biāo)準(zhǔn)日期時(shí)間格式的字符串
UTC_ISO_DateTime = datetime.datetime.isoformat(UTCDateTime)
print(UTC_ISO_DateTime, type(UTC_ISO_DateTime))         # 2022-07-10T19:14:27.001235 <class 'str'>
# 將ISO標(biāo)準(zhǔn)日期時(shí)間格式的字符串轉(zhuǎn)換為日期時(shí)間類(lèi)型
From_UTC_ISO_DateTime = datetime.datetime.fromisoformat('9999-12-31T23:59:59.999999')   # <class 'datetime.datetime'>
print(From_UTC_ISO_DateTime, type(From_UTC_ISO_DateTime))
# ISO標(biāo)準(zhǔn)的周內(nèi)第N天
# 值的范圍是[1,7],1代表周一,7代表周日
UTC_ISO_WeekDateTime = datetime.datetime.isoweekday(UTCDateTime)
print(UTC_ISO_WeekDateTime, type(UTC_ISO_WeekDateTime))     # 7 <class 'int'>
# ISO標(biāo)準(zhǔn)的日歷時(shí)間,Calendar中文釋義為日歷
# 各個(gè)值的含義為(年份、周數(shù)、周內(nèi)的第N天)即(year, week, weekday);
# weekday的值為[1,7],1代表周一,7代表周日
# 示例:datetime.IsoCalendarDate(year=2022, week=27, weekday=7)
UTC_ISO_CalendarDateTime = datetime.datetime.isocalendar(UTCDateTime)
print(UTC_ISO_CalendarDateTime, type(UTC_ISO_CalendarDateTime))
# 將ISO標(biāo)準(zhǔn)日歷格式的字符串轉(zhuǎn)換為時(shí)間日期型
From_UTC_ISO_CalendarDateTime = datetime.datetime.fromisocalendar(year=2022, week=27, day=7)
print(From_UTC_ISO_CalendarDateTime)        # 2022-07-10 00:00:00
print(type(From_UTC_ISO_CalendarDateTime))  # <class 'datetime.datetime'>

# 日期時(shí)間替換函數(shù)replace()
# replace()可以只替換日期時(shí)間屬性的某一項(xiàng)
# replace()函數(shù)的第一個(gè)參數(shù)必傳
# replace()函數(shù)的第一個(gè)參數(shù)是一個(gè)日期時(shí)間類(lèi)型(datetime.datetime)的對(duì)象
# 按關(guān)鍵字傳參替換
# 按位置傳參體換
datetime_replace = datetime.datetime(year=2022, month=7, day=9, hour=19, minute=14, second=27, microsecond=123)
# 初始值
print(f"datetime_replace的原值為：{datetime_replace}", f"類(lèi)型是：{type(datetime_replace)}")
# 不傳參數(shù)
print(datetime.datetime.replace(datetime_replace))    # 2022-07-09 19:14:27.000123
# 只替換年份
print(datetime.datetime.replace(datetime_replace, 2019))    # 2019-07-09 19:14:27.000123
print(datetime.datetime.replace(datetime_replace, year=2019))   # 2019-07-09 19:14:27.000123
# 只替換月份, 替換其他參數(shù)同理
print(datetime.datetime.replace(datetime_replace, month=12))            # 2022-12-09 19:14:27.000123
print(datetime.datetime.replace(datetime_replace, datetime_replace.year, 12))   # 2022-12-09 19:14:27.000123
# 替換其他參數(shù)同理
print(datetime.datetime.replace(datetime_replace, year=2019, month=12, day=31, hour=15,
                               minute=13, second=15, microsecond=9999))    # 2019-12-31 15:13:15.00999
# 日期時(shí)間對(duì)象格式化strftime()
# 日期時(shí)間對(duì)象格式化常用的格式如下：
""
%H(兩位數(shù)的小時(shí))、%M(兩位數(shù)的分鐘)、%S(兩位數(shù)的秒)、%f(6位數(shù)的微秒)、%h(簡(jiǎn)寫(xiě)的月份名,一般為英文簡(jiǎn)寫(xiě))
%y(兩位數(shù)的年份)、%Y(四位數(shù)的年份)、%m(兩位數(shù)的月份)、%d(兩位數(shù)的天數(shù))
"""
# 可以只格式化部分屬性
datetime_str = datetime.datetime.strftime(datetime_replace, "%Y-%m-%d %H:%M:%S.%f")
print(f"格式化后是：{datetime_str}", type(datetime_str))      # 2022-07-09 19:14:27.000123 <class 'str'>
# 格式化日期屬性
datetime_str_date = datetime.datetime.strftime(datetime_replace, "%Y-%m-%d")
print(f"格式化日期的值為：{datetime_str_date}")      # 2022-07-09
# 格式時(shí)間屬性
datetime_str_time = datetime.datetime.strftime(datetime_replace, "%H:%M:%S.%f")
print(f"格式化時(shí)間的值為：{datetime_str_time}")      # 19:14:27.000123
```