'''asctime()'''
import time
# Get Current time
print(time.asctime())
# =========================================================
# Get time in seconds since the epoch
seconds = time.time()
# Convert to struct_time
time_struct = time.localtime(seconds)
# Convert to a string
time_str = time.asctime(time_struct)
print(time_str)
# =========================================================
# July 20, 1969, 20:17 UTC, when man first landed on the moon
timestamp = 14182900
# Convert to a struct_time in UTC
time_struct = time.gmtime(timestamp)
# Convert to a String
print(time.asctime(time_struct))
執行結果：
Fri Jul 7 19:03:15 2023
Fri Jul 7 19:03:15 2023
Sun Jun 14 03:41:40 1970
PYTHON
'''ctime()'''
mport time
# Gives current time
print(time.ctime())
# July 20, 1969, 20:17 UTC, when man first landed on the moon
timestamp = 14182900
print(time.ctime(timestamp))
執行結果：
Output: Fri Jul 7 17:13:47 2023
Output: Sun Jun 14 03:41:40 1970
gmtime(), localtime(), mktime()
gmtime([secs]) 將 Epoch ，轉換為 UTC (Coordinated Universal Time) 格式的 struct_time 物件。如果未提供 secs，它將返回 UTC 時間。
import time
# 【gmtime()】
# Getting current time
utc_time = time.gmtime()
print(utc_time)
# Formatting the time
formatted_time = time.strftime("%Y-%m-%d %H:%M:%S", utc_time)
print(formatted_time)
# =========================================================
# 【localtime()】
# Getting local time
local_time = time.localtime()
print(local_time)
# Formatting the time
formatted_time = time.strftime("%Y-%m-%d %H:%M:%S", local_time)
print(formatted_time)
'''mktime()'''
import time
# =========================================================
# 【Converting the current time to epoch time】
# Get the current time
now = time.localtime()
# convert struct_time to epoch time
epoch_time = time.mktime(now)
print("Epoch time:", epoch_time)
# =========================================================
# 【Converting a specific time to epoch time】
# Define a time tuple
time_tuple = (2023, 7, 7, 15, 30, 0, 4, 188, -1) # July 7, 2023, 15:30:00
# convert the time tuple to epoch time
epoch_time = time.mktime(time_tuple)
print("Epoch time:", epoch_time)
# =========================================================
# 【Comparing two dates】
# Define two time tuples
time_tuple1 = (2023, 7, 7, 15, 30, 0, 4, 188, -1) # July 7, 2023, 15:30:00
time_tuple2 = (2023, 8, 7, 15, 30, 0, 1, 219, -1) # August 7, 2023, 15:30:00
# Convert the time tuples to epoch time
epoch_time1 = time.mktime(time_tuple1)
epoch_time2 = time.mktime(time_tuple2)
# Compare the epoch times
print("Time difference in seconds:", epoch_time2 - epoch_time1)
執行結果：
Epoch time: 1688727762.0
Epoch time: 1688715000.0
Time difference in seconds: 2678400.0
strftime(), strptime()
strptime(string[, format]) 根據 format 解析表示時間的 string，返回 struct_time 物件。
time module 的 struct_time 不夠複雜，無法計算不同年份的日期之間的天數，為此我們可以使用使用 datetime module。
PYTHON
'''strptime()'''
import time
t = time.gmtime()
print(t)
# =========================================================
# Extract specific values
t = time.localtime()
print(f"Year: {t.tm_year}")
print(f"Month: {t.tm_mon}")
print(f"Day of the week: {t.tm_wday}")
# Extract specific values (using indices)
print(f"Year: {t[0]}")
print(f"Month: {t[1]}")
print(f"Day of the week: {t[6]}")
# =========================================================
# Calculate the number of days between two dates
date1 = "2023-07-01"
date2 = "2023-07-07"
struct_time1 = time.strptime(date1, "%Y-%m-%d")
struct_time2 = time.strptime(date2, "%Y-%m-%d")
days_difference = struct_time2.tm_yday - struct_time1.tm_yday
print(f"The number of days between {date1} and {date2} is {days_difference}.")
# =========================================================
# Calculate the number of days between dates from different years
from datetime import datetime
date1 = "2023-07-01"
date2 = "2024-07-07"
# Convert strings to datetime objects
datetime1 = datetime.strptime(date1, "%Y-%m-%d")
datetime2 = datetime.strptime(date2, "%Y-%m-%d")
# Subtract datetimes and extract the number of days
days_difference = (datetime2 - datetime1).days
print(f"The number of days between {date1} and {date2} is {days_difference}.")
執行結果：
time.struct_time(tm_year=2023, tm_mon=7, tm_mday=7,
tm_hour=13, tm_min=55, tm_sec=10, tm_wday=4, tm_yday=188, tm_isdst=0)
Year: 2023
Month: 7
Day of the week: 4
Year: 2023
Month: 7
Day of the week: 4
The number of days between 2023-07-01 and 2023-07-07 is 6.
The number of days between 2023-07-01 and 2024-07-07 is 372.
strftime(format[, t]) 將 struct_time 物件轉換為 format 指定的 String。 format 詳見：。 如果未提供 t，則使用 localtime() 返回的當前時間。 format 必須是字符串。
