[英]How to generate this code dynamically in Python?
I have a large list of data and another list of patterns. 我有大量的数据列表和另一个模式列表。 I'm trying to filter data using the patterns.
我正在尝试使用模式过滤数据。 Here's my code using some sample data:
这是使用一些示例数据的代码:
dataList = [ '4334 marked val 5656 bin',
'76-67-34 done this 99',
'bin ket AZZ3R434 pid'
]
for data in dataList:
regexList = [ re.search(r'val ([\d]+) bin', data),
re.search(r'bin ket ([A-Z\d-]+)\b', data)
]
for reg in regexList:
if reg: #If there's a match
#...do something...
break
In the above code in regexlist the 're.search()' part is getting repeated again and again. 在上面的正则表达式代码中,“ re.search()”部分一次又一次地重复。 I want to keep only a list of patterns, something like below:
我只想保留模式列表,如下所示:
regexList = [ 'val ([\d]+) bin',
'bin ket ([A-Z\d-]+)\b'
]
And use these patterns one by one with re.search() later. 并在稍后与re.search()一一对应使用这些模式。 I tried using eval() and exec() both, but just kept getting errors.
我尝试同时使用eval()和exec(),但是一直出错。
I would also like to know whether 'regexList' is getting created again and again under for loop? 我也想知道是否在for循环下一次又一次创建了“ regexList”?
I don't see why you would need to do this with eval/exec. 我不明白为什么您需要使用eval / exec来执行此操作。 Just pass the pattern to re.search inside the loop:
只需将模式传递给循环内的re.search即可:
regexList = [
r'val ([\d]+) bin',
r'bin ket ([A-Z\d-]+)\b'
]
for pattern in regexList:
if re.search(pattern, data):
...
dataList = [ '4334 marked val 5656 bin',
'76-67-34 done this 99',
'bin ket AZZ3R434 pid'
]
regexList = [
r'val ([\d]+) bin',
r'bin ket ([A-Z\d-]+'
]
for data in dataList:
for reg in regexList:
if re.search(reg,data): #If there's a match
#...do something...
break
i would suggest use a "router" (for example Dromeo , i'm author), the point is that a router matches patterns and executes actions if pattern matches, so it is what you need exactly. 我建议使用“路由器”(例如Dromeo ,我是作者),重点是路由器匹配模式并在模式匹配时执行操作,因此这正是您所需要的。
Example: 例:
import Dromeo
router = Dromeo()
router.on('4334 marked val {%INT%:val} bin', my_handler)
router.route('4334 marked val 5656 bin')
def my_handler( params ):
# val is already typecasted to integer
print(params['data']['val'])
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