import time time.sleep(7) print(11) 让主程序暂时11秒后，再继续执行 time.sleep(0.1) # sleep 0.1秒
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import time
from tpf import log
def task_to_run():
print("Task is running at the specified time (or close to it).")
def run(wait_time = 24*60*60):
current_time = time.time()
target_time = current_time + wait_time
while True:
if time.time() >= target_time:
task_to_run()
break # 执行完毕后退出循环
else:
time.sleep(3*60) # 每3*60秒检查一次时间
log("sleep",fil="run.log")
run()
run.sh
nohup /data/jupyter/pyuban/bin/python /opt/wks/jupyter/test/run.py >/tmp/run.log 2>&1 &
下面的方式不一定生效
!sh run.sh
可采用下面的方式
import os
os.system("sh /opt/wks/jupyter/test/run.sh ")
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time年月日时分秒
import time
now =time.strftime("%Y-%m-%d %H:%M:%S")
'2023-04-25 14:18:04'
import time
now =time.strftime("%H:%M:%S")
'14:23:32'
import datetime
t=datetime.datetime.strptime('2023-05-21','%Y-%m-%d')
print(t) # 2023-05-21 00:00:00
timedelta(days=0, seconds=0, microseconds=0, milliseconds=0, minutes=0, hours=0, weeks=0)
当前日期前一天
import datetime
day1 = datetime.datetime.now() - datetime.timedelta(days=1)
day1.strftime('%Y-%m-%d')
指定日期前一天
import datetime
date_A= input('请输入日期（格式：yyyy-mm-dd）：')
dayA= datetime.datetime.strptime(date_A, '%Y-%m-%d')
delta=datetime.timedelta(days=1)
dayB=dayA-delta
print("输入日期的前一天："+dayB.strftime('%Y-%m-%d'))
0.5天
import datetime
day1 = datetime.datetime.now() - datetime.timedelta(days=0.5)
day1.strftime('%Y-%m-%d %H:%M:%S')
'2023-07-19 02:49:51'
import datetime,time dt = datetime.datetime(2022, 12, 21, 19, 10, 20) # 转struct_time tt = dt.timetuple() # struct_time 转秒数 seconds = time.mktime(tt) seconds 1671667820.0
天数相减
import datetime day1 = datetime.datetime.now() day3 = datetime.datetime.now() - datetime.timedelta(days=3) day = day1 - day3 day.days 输出： 2
两个日期之间的天数
from datetime import datetime start_date = "2023-01-01" end_date = "2023-07-14" start_datetime = datetime.strptime(start_date, "%Y-%m-%d") end_datetime = datetime.strptime(end_date, "%Y-%m-%d") delta = end_datetime - start_datetime days = delta.days days 194
time.time
import time
start_time = time.time() # 记录程序开始时间
y=model(X=index)
end_time = time.time() # 记录程序结束时间
tim_ms = round((end_time - start_time)*1000,2)
print("程序运行时间为", tim_ms, "毫秒")
datetime.datetime.now()
import datetime
start_time = datetime.datetime.now() # 记录程序开始时间
y=model(X=index)
end_time = datetime.datetime.now() # 记录程序结束时间
tim = (end_time - start_time)
print(type(tim)) # class 'datetime.timedelta'
print("程序运行时间为", tim.total_seconds() *1000,"毫秒")
timeit：可精确到微秒
import timeit
# 只能写简单的代码，不能写方法，不能对象调用
code_to_test = """
for i in range(10000):
pass
"""
elapsed_time = timeit.timeit(code_to_test, number=1)
print("代码执行1次的平均时间为：", round(elapsed_time*1000*1000), "微秒")
代码执行1次的平均时间为： 184 微秒
profile
import profile
def foo():
for i in range(10000000):
pass
profile.run("foo()")
5 function calls in 0.234 seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.234 0.234 0.234 0.234 2673007575.py:3(foo)
1 0.000 0.000 0.234 0.234 :0(exec)
1 0.000 0.000 0.000 0.000 :0(setprofile)
1 0.000 0.000 0.234 0.234 string:1(module)
1 0.000 0.000 0.234 0.234 profile:0(foo())
0 0.000 0.000 profile:0(profiler)
cProfile : c语言版的profile
import cProfile
def foo():
for i in range(10000):
pass
cProfile.run("foo()")
4 function calls in 0.001 seconds
Ordered by: standard name
ncalls tottime percall cumtime percall filename:lineno(function)
1 0.001 0.001 0.001 0.001 1155913500.py:3(foo)
1 0.000 0.000 0.001 0.001 string:1(module)
1 0.000 0.000 0.001 0.001 {built-in method builtins.exec}
1 0.000 0.000 0.000 0.000 {method 'disable' of '_lsprof.Profiler' objects}
当前时间N月以前，不包含N
import time
def month_before(n=1):
"""N月以前
- 以12为进制计算年月
- 202308 1月以前就是202307
"""
t = time.localtime(time.time())
year=t[0]
month=t[1]
interval = n
interval_month = interval%12
interval_month
if interval <= month:
new_month = month - interval
new_year = year
if new_month == 0 :
new_year = year - 1
new_month = 12
else:
new_month = month - interval
interval_year = int((0-new_month)/12)
new_year = year - (interval_year+1)
new_month = new_month%12
if new_month == 0 :
new_month = 12
res = "{}{}".format(new_year, '%02d'%new_month)
return res
验证
当前时间:2023-08 month_before(n=1) '202307' month_before(n=7) '202301' month_before(n=8) '202212' month_before(n=12) '202208' month_before(n=20) '202112'
指定月份N月以前
def month_before2(year,month,n=1):
"""N月以前
- 以12为进制计算年月
- 202308 1月以前就是202307
"""
interval = n
year = int(year)
month = int(month)
interval_month = interval%12
interval_month
if interval <= month:
new_month = month - interval
new_year = year
if new_month == 0 :
new_year = year - 1
new_month = 12
else:
new_month = month - interval
interval_year = int((0-new_month)/12)
new_year = year - (interval_year+1)
new_month = new_month%12
if new_month == 0 :
new_month = 12
res = "{}{}".format(new_year, '%02d'%new_month)
return res
month_before2(2023,1,n=1,) '202212' month_before2(2023,11,n=1,) '202310'
逐月取前一个月
m1 = "202212"
m2 = "202311"
while m2>m1:
year = m2[:4]
month = m2[4:6]
res = month_before2(year,month)
print(res)
m2 = res
202310
202309
202308
202307
202306
202305
202304
202303
202302
202301
202212
import datetime
t=datetime.datetime.now().isocalendar()
y,x,d = t
if d == 0:
d = '日'
print(f"今天是{y}年第{x}个星期，星期{d}") # 今天是2023年第21个星期，星期4