[英]Pytest & custom exception : TypeError: exceptions must be derived from BaseException, not class 'module'
[英]SystemExit exception not seen as derived from BaseException
我目前正在尝试实现一些代码,如果失败,我想针对特定消息引发异常。 我想使用一个基本异常SystemExit,该异常应该从BaseException派生。 我导入sys模块
我以这种方式提出异常:
add_ip = None
# search for the ip address associated with the equipment's mac address
for i in range(0, len(add_match)):
found = add_match[i].find(add_mac)
if found != -1:
add_ip = add_match[i].split()[0]
// it turns out that I don't find the matching IP address
if add_ip is not None:
print("@IP =\t", add_ip) # log matching IP
else:
raise (SystemExit, "failure retrieving interface's IP address")
当我打案件时,我会收到一条错误消息,指出
TypeError: exceptions must derive from BaseException
我搜索了一个解决方案,并找到了一个解决方案: 即使我确实定义了并将代码修改为: 我仍然收到“ TypeError:异常必须从BaseException派生” :
raise SystemExit("failure retrieving interface's IP address")
但是我最终还是遇到了同样的失败……有人对我在做什么错有任何想法吗?
谢谢
亚历山大(Alexandre)
编辑:当我去定义SystemExit时,我得到了:
class SystemExit(BaseException):
""" Request to exit from the interpreter. """
def __init__(self, args, kwargs):
pass
code = None
好吧,我不知道发生了什么,但是现在可以了。 实际上,由于提取IP地址的新方法,我更改了算法,以便从文件而不是Windows命令获取IP扫描数据(arp -a对我而言太有限了),因此我将代码修改为如下:
add_ip = None
# parse a previousely saved Angry-IP export
try:
with open ("current_ip_scan.txt", "r") as scan_file:
for line in scan_file:
line = line.upper()
line = re.sub(r':','-', line)
if (re.search(add_mac, line)) is not None:
add_ip = re.findall('(([0-9]{2,3}\.){3}[0-9]{3})',line)[0][0] # to get the first element of the tuple
except FileNotFoundError:
print("*** Angry-IP export not available - do it into 'current_ip_scan.txt' in order to find the matching IP address ***")
raise SystemExit("failure retrieving interface's IP address")
if add_ip is not None:
# check that the ip address is a valid IP
if(re.match('(([0-9]{2,3}\.){3}[0-9]{3})', add_ip)) is not None:
print("@IP =\t", add_ip) # log matching IP
else:
raise SystemExit("failure retrieving interface's IP address")
else:
#sys.exit("failure retrieving interface's IP address")
raise SystemExit("failure retrieving interface's IP address")
return add_ip
我同时尝试了sys.exti和提高SystemExit,现在两者都可以工作(?)。 @kevin @ sanket:谢谢您的帮助和时间
亚历山大(Alexandre)
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