English 中文(简体)
获准在一行找到A而不是B
原标题:Regex to find A and not B on a line

I m 寻求一种reg,以寻找我的on方案,以找到所有线,将<条码>foo<>/code>但<条码>/条码>作为关键词通过。 我玩.头 and,看上去说,但是没有多少uck。

任何帮助?

增 编

最佳回答

如果有的话,请填写<代码>foo。 您希望找到另一个星号(<条码>/条码>,但不能出席。

^(?!.*bar).*foo

创造完全满足你们所有要求的定期表达是非常困难的,因为“灰色”法并不是一种固定的语言,但希望你能够把这一表述作为起点,使你们的需求得到足够的满足。

问题回答

有了<代码>><>>>>>>>>>><>>>>>>>><>>>>>><>>>>><>>>>><>>>>><>>>>><>>>>>><>>>>>><>>>>>><>>>>>><>>>>><>>>>><>>>>>>>>> > > > > 在上述假设情景中,光头号对我来说,似乎总是更好。 阅读它对于我来说也更有意义。

(?!*bar)^.*foo

this has a foo          # pass
so does this has a foo  # pass
i can haz foo           # pass
but i haz foo and bar!  # fail

否则,你也可以这样做:

for line in file:
    if "foo" in line and "bar" not in line:
        #do something

3. 整个项目:

^(?=.*a)(?!.*b).*$




相关问题
Can Django models use MySQL functions?

Is there a way to force Django models to pass a field to a MySQL function every time the model data is read or loaded? To clarify what I mean in SQL, I want the Django model to produce something like ...

An enterprise scheduler for python (like quartz)

I am looking for an enterprise tasks scheduler for python, like quartz is for Java. Requirements: Persistent: if the process restarts or the machine restarts, then all the jobs must stay there and ...

How to remove unique, then duplicate dictionaries in a list?

Given the following list that contains some duplicate and some unique dictionaries, what is the best method to remove unique dictionaries first, then reduce the duplicate dictionaries to single ...

What is suggested seed value to use with random.seed()?

Simple enough question: I m using python random module to generate random integers. I want to know what is the suggested value to use with the random.seed() function? Currently I am letting this ...

How can I make the PyDev editor selectively ignore errors?

I m using PyDev under Eclipse to write some Jython code. I ve got numerous instances where I need to do something like this: import com.work.project.component.client.Interface.ISubInterface as ...

How do I profile `paster serve` s startup time?

Python s paster serve app.ini is taking longer than I would like to be ready for the first request. I know how to profile requests with middleware, but how do I profile the initialization time? I ...

Pragmatically adding give-aways/freebies to an online store

Our business currently has an online store and recently we ve been offering free specials to our customers. Right now, we simply display the special and give the buyer a notice stating we will add the ...

Converting Dictionary to List? [duplicate]

I m trying to convert a Python dictionary into a Python list, in order to perform some calculations. #My dictionary dict = {} dict[ Capital ]="London" dict[ Food ]="Fish&Chips" dict[ 2012 ]="...

热门标签