Python 属性组不属于对象
如果我在脚本的开头声明“line”变量,那么下面的代码可以正常工作。类似于Python 属性组不属于对象,python,Python,如果我在脚本的开头声明“line”变量,那么下面的代码可以正常工作。类似于 s = "Jul 15 12:12:51 whitelist logger: 1|999999999999|id:d9faff7c-4016-4343-b494-37028763bb66 submit date:1307130919 done date:1307130919 stat:DELIVRD err:0|L_VB3_NM_K_P|1373687445|vivnel2|L_VB3_GH_K_P|promo_camp
s = "Jul 15 12:12:51 whitelist logger: 1|999999999999|id:d9faff7c-4016-4343-b494-37028763bb66 submit date:1307130919 done date:1307130919 stat:DELIVRD err:0|L_VB3_NM_K_P|1373687445|vivnel2|L_VB3_GH_K_P|promo_camp1-bd153424349bc647|1"
打开文件并循环行时,“组”属性不起作用。我得到一个错误:AttributeError:“非类型”对象没有属性“组”
# cat mylast.py
import re
f = open('customer.csv')
for line in f:
logger_re = re.compile(
"logger: ([^ ]+)\
submit date:(\d+)\
done date:(\d+)\
stat:(.+)\
err:(.+)$")
myvalues = logger_re.search(line).groups()
print myvalues
f.close()
例外情况:
# python mylast.py
Traceback (most recent call last):
File "mylast.py", line 13, in ?
myvalues = logger_re.search(line).groups()
AttributeError: 'NoneType' object has no attribute 'groups'
正则表达式与实际文件内容不匹配 因此,
logger\u re.search(line)
返回None
这里的问题是,您缩进了正则表达式,但没有补偿额外的空白:
logger_re = re.compile(
"logger: ([^ ]+)\
submit date:(\d+)\
done date:(\d+)\
stat:(.+)\
err:(.+)$")
请注意,行开头的空格很重要。使用单独的字符串(Python将在编译时连接它们):
如果没有找到匹配项,搜索将返回
None
。在尝试访问groups()
之前,您需要检查myvalues是否为None
,print repr(line)
告诉您文件中有什么内容?
logger_re = re.compile(
"logger: ([^ ]+) "
"submit date:(\d+) "
"done date:(\d+) "
"stat:(.+) "
"err:(.+)$")