Python 时间日期转换, time 和 datetime

Python time和datetime时间戳和时间字符串相互转换

时间的四种类型

"""时间字符串 / 格式化时间（time_string)"""
time_string1 = "2019/10/12 16:48:24"
time_string2 = "2019-10-12 16:48:24"
time_string3 = "Sat Oct 12 16:48:24 2019"

#-------------------------------------------------------------------------------
        
"""日期时间元组 / 日期时间对象(datetime_tuple / datetime_obj)"""
datetime_obj = datetime.datetime(2019, 10, 12, 16, 48, 24, 198690)    
print(datetime_obj)    # 显示 2019-10-12 16:48:24.198690
 
#-------------------------------------------------------------------------------

"""时间元组 / 时间对象(time_tuple / time_obj)"""
# (1) 适用于 time 模块
time_tuple1 = (2019, 10, 12, 16, 48, 24, 5, 285, 0)

# (2) 适用于 datetime 模块
time_tuple2 = (2019, 10, 12, 16, 48, 24, 198690)  

#-------------------------------------------------------------------------------

"""时间戳(timestamp)"""
timestamp = 1570870104.0 

time 模块

"""时间戳 ----> UTC时间元组"""

# (1) 1570870104.0 ----> (2019, 10, 12, 16, 48, 24, 5, 285, 0)
time_tuple = time.gmtime(1570870104.0)

#-------------------------------------------------------------------------------

"""时间戳 ----> 时间元组"""

# (1) 1570870104.0 ----> (2019, 10, 12, 8, 48, 24, 5, 285, 0)
time_tuple = time.localtime(1570870104.0)

#-------------------------------------------------------------------------------

"""时间元组 ----> 时间戳"""

# (1) (2019, 10, 12, 16, 48, 24, 5, 285, 0) ----> 1570870104.0
timestamp = time.mktime((2019, 10, 12, 16, 48, 24, 5, 285, 0))

#-------------------------------------------------------------------------------

"""时间元组 ----> 格式化时间"""

# (1) (2019, 10, 12, 16, 48, 24, 5, 285, 0) ----> "2019/10/12 16:48:24"
time_tuple = (2019, 10, 12, 16, 48, 24, 5, 285, 0)
formatted_time = time.strftime("%Y/%m/%d %H:%M:%S", time_tuple)

# (2) (2019, 10, 12, 16, 48, 24, 5, 285, 0) ----> "2019/10/12 16:48:24"
time_tuple = (2019, 10, 12, 16, 48, 24, 5, 285, 0)
formatted_time = time.strftime("%Y-%m-%d %H:%M:%S", time_tuple)

# (3) (2019, 10, 12, 16, 48, 24, 5, 285, 0) ----> "Sat Oct 12 16:48:24 2019"
formatted_time = time.asctime((2019, 10, 12, 16, 48, 24, 5, 285, 0))

#-------------------------------------------------------------------------------

"""格式化时间 ----> 时间元组"""

# (1) "2019/10/12 16:48:24" ----> (2019, 10, 12, 16, 48, 24, 5, 285, -1)
a1 = "2019/10/12 16:48:24"
time_tuple = time.strptime(a1, "%Y/%m/%d %H:%M:%S")

# (2) "2019-10-12 16:48:24" ----> (2019, 10, 12, 16, 48, 24, 5, 285, -1)
a1 = "2019-10-12 16:48:24"
time_tuple = time.strptime(a1, "%Y-%m-%d %H:%M:%S")

# (3) "Sat Oct 12 16:48:24 2019" ----> (2019, 10, 12, 16, 48, 24, 5, 285, -1)
a2 = "Sat Oct 12 16:48:24 2019" 
time_tuple = time.strptime(a2, "%a %b %d %H:%M:%S %Y")

#-------------------------------------------------------------------------------

""" 时间戳 ----> 格式化时间"""

# (1) 1570870104.0 ----> "2019/10/12 16:48:24"
formatted_time = time.strftime("%Y/%m/%d %H:%M:%S", time.localtime(1570870104.0))

# (2) 1570870104.0 ----> "2019-10-12 16:48:24"
formatted_time = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(1570870104.0))

# (3) 1570870104.0 ----> "Sat Oct 12 16:48:24 2019"
formatted_time = time.asctime(time.localtime(1570870104.0))

#-------------------------------------------------------------------------------

"""格式化时间 ----> 时间戳"""

# (1) "2019/10/12 16:48:24" ----> 1570870104.0
a1 = "2019/10/12 16:48:24"
timestamp = time.mktime(time.strptime(a1, "%Y/%m/%d %H:%M:%S"))

# (2) "2019-10-12 16:48:24" ----> 1570870104.0
a1 = "2019-10-12 16:48:24"
timestamp = time.mktime(time.strptime(a1, "%Y-%m-%d %H:%M:%S"))

# (3) "Sat Oct 12 16:48:24 2019" ----> 1570870104.0
a2 = "Sat Oct 12 16:48:24 2019" 
timestamp = time.mktime(time.strptime(a2, "%a %b %d %H:%M:%S %Y"))

datetime 模块

"""时间戳 ----> UTC日期时间对象"""

# (1) 1570870104.0 ----> 2019-10-12 8:48:24
timestamp = 1570870104.0
datetime_obj = datetime.datetime.utcfromtimestamp(timestamp)

#-------------------------------------------------------------------------------

"""时间戳 ---->日期时间对象"""

# (1) 1570870104.0 ----> 2019-10-12 16:48:24
timestamp = 1570870104.0
datetime_obj = datetime.datetime.fromtimestamp(timestamp)

#-------------------------------------------------------------------------------

"""日期时间对象 ----> 时间元组"""

# (1) 2019-10-12 16:48:24.198690 ----> (2019, 10, 12, 16, 48, 24, 5, 285, -1)
datetime_obj = datetime.datetime(2019, 10, 12, 16, 48, 24, 198690)
time_tuple = datetime_obj.timetuple()

#-------------------------------------------------------------------------------

"""时间元组 ----> 日期时间对象"""

# (1) (2019, 10, 12, 16, 48, 24, 198690) ----> 2019-10-12 16:48:24.198690
datetime_obj = datetime.datetime(2019, 10, 12, 16, 48, 24, 198690)

#-------------------------------------------------------------------------------

"""格式化时间 ----> 日期时间对象"""

# (1) "2019/10/12 16:48:24.198690" ----> 2019-10-12 16:48:24.198690
formatted_time = "2019/10/12 16:48:24.198690"
datetime_obj = datetime.datetime.strptime(formatted_time, "%Y/%m/%d %H:%M:%S.%f")

# (2) "2019-10-12 16:48:24.198690" ----> 2019-10-12 16:48:24.198690
formatted_time = "2019-10-12 16:48:24.198690"
datetime_obj = datetime.datetime.strptime(formatted_time, "%Y-%m-%d %H:%M:%S.%f")

# (3) "Sat Oct 12 16:48:24.198690 2019" ----> 2019-10-12 16:48:24.198690
formatted_time = "Sat Oct 12 16:48:24.198690 2019"
datetime_obj = datetime.datetime.strptime(formatted_time, "%a %b %d %H:%M:%S.%f %Y")

#-------------------------------------------------------------------------------

"""日期时间对象 ----> 格式化时间"""

# (1) 2019-10-12 16:48:24.198690 ----> "2019/10/12 16:48:24.198690"
string = "2019/10/12 16:48:24.198690"
datetime_obj = datetime.datetime.strptime(string, "%Y/%m/%d %H:%M:%S.%f")
string = datetime_obj.strftime("%Y/%m/%d %H:%M:%S.%f")

# (2) 2019-10-12 16:48:24.198690 ----> "2019-10-12 16:48:24.198690"
string = "2019-10-12 16:48:24.198690"
datetime_obj = datetime.datetime.strptime(string, "%Y-%m-%d %H:%M:%S.%f")
string = datetime_obj.strftime("%Y-%m-%d %H:%M:%S.%f")

# (3) 2019-10-12 16:48:24.198690 ----> "Sat Oct 12 16:48:24.198690 2019"
formatted_time = "Sat Oct 12 16:48:24.198690 2019"
datetime_obj = datetime.datetime.strptime(formatted_time, "%a %b %d %H:%M:%S.%f %Y")
string = datetime_obj.strftime("%a %b %d %H:%M:%S.%f %Y")