我有问题要备份我的数据库,错误: Backup failed for Server 'SERV1'. (Microsoft.SqlServer.SmoExtended) ADDITIONAL INFORMATION: System.Data.SqlClient.SqlError: Cannot open backup device 'D:\Backup\POSDW\POSDW_backup_201
program1.py: a = "this is a test"
for x in a:
print(x)
program2.py: a = """this is a test
with more than one line
three, to be exact"""
for x in a:
print(x)
program3.py: im
我(试图)在我的程序中使用globals()来迭代所有全局变量。这是我去一下吧: for k, v in globals().iteritems():
function(k, v)
当然,在这样做时,我刚刚创建2个全局变量,k和v。所以,我得到这个异常: RuntimeError: dictionary changed size during iteration
而且,这里是在解