fifth week

3.19
import time
current_time=time.time()
local_time=time.localtime(current_time)
formatted_time=time.strftime("%Y-%m-%d",local_time)
print("当前日期(年-月-日):",formatted_time)
3.20
from time import*
time()
from time import*
gmtime()
from time import*
gmtime()
3.21
import time
scale = 36
start = time.perf_counter()
print("执行开始".center(scale//2,'-'))
for i in range(scale+1):
a = '*' * i
b = '·' * (scale-i)
c = (i/scale) * 100
end = time.perf_counter()
print("\r{:>3.0f}%[{}->{}]{:.2f}秒".format (c,a,b,end-start), end = " ")
time.sleep(0.05)
print("\n"+"执行结束".center(scale//2,'-'))
习题3.6
import time
scale = 10
print("Starting" ,end = ' ')
for i in range(10):
print("..",end = ' ')
time.sleep(0.5)
print("Done!")

习题3.7
while 1:
for i in ["/","-","|","","|"]:
print("%s\r" % i ,end = ' ')

习题3.8
from tqdm import tqdm
from time import sleep
for i in tqdm(range(1,100)):
print("")
sleep(0.01)