python文件操作=======复习

f=open('test','r',encoding='utf8')
data=f.readlines()
# f.seek()
# f.tell()
# f.write()


number=0
for i in data:
    print(i)

with open('java','w',encoding='utf-8') as f:
    f.write('rter')

#装饰器 了解一下

import  time
def show_time(fun):
   def test():
      start=time.time()
      fun() #这里算是一个拐点
      end=time.time()
      print('%s'%(end-start))
   return test

@show_time  #fun=show_time(op1)
def op1():
    print('ere')
    time.sleep(2)

@show_time
def op2():
    print('ere')