python 报错 ValueError: I/O operation on closed file.
找了一下午原因不知道为什么 有知道的吗,谢谢评论
import datetime
# 处理时间循
f_out =open('/pyt/num.txt','r+')
a = f_out.read()
a = int(a) + 1
#print(a)
f_out.seek(0)
while a >= 30:
f_out.write('30');
f_out.close();
with open('/pyt/num.txt',mode='r+') as f:
t = f.read()
t = t.replace('30','0')
f.seek(0)
f.write(t)
f.truncate()
else:
f_out.write(str(a))
f_out.close()
# 处理时间加多少天
src_day = '20211129'
src_day = datetime.datetime.strptime(src_day, '%Y%m%d')
out_dt = src_day + datetime.timedelta(days = a)
print (out_dt)