程序如下:
#TextProBarV3.py
import time
scale = 50
print("执行开始".center(scale//2,"-"))
start =time.perf_counter()
for i in range(scale+1):
a = "*"*i
b = "."*(scale-i)
c = (i/scale)*100
dur = time.pefr_counter()-start
print("\r{:……3.0f}%[{}->{}]s".format(c,a,b,dur),end='')
time.sleep(0.1)
print("\n"+"执行结束".center(scale//2,'-'))
执行后,出现:
File "C:/Users/duoduo520/Documents/TextProBarV4py.py", line 10, in <module>
dur = time.pefr_counter()-start
AttributeError: module 'time' has no attribute 'pefr_counter',这是什么问题?
用的是Python 3.9.0 shell