abstr | Generate scenario files for A/B Street
kandi X-RAY | abstr Summary
kandi X-RAY | abstr Summary
See the formats page in the A/B Street documentation for details of the schema that the package outputs.
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QUESTION
I continue with my exploration on the Num library of Ocaml, with the reason that one whole library about logics was written using it.
Today, I would like to make the negative of a rational number. Obtain -1/2, from 1/2.
To do so, I think that, given an a of type Ratio.ratio, I can compute the negative of it (and return a ratio, not a num) this way:
ratio_of_num (minus_num (num_of_ratio a))
(Functions from: https://ocaml.org/releases/4.05/htmlman/libref/Num.html#TYPEnum)
Now, I would like to check the result, but I always get this solution: Ratio.ratio =
The point is that now I realize that I always get this solution when I use ratio_of_num. For instance:
ANSWER
Answered 2021-May-12 at 21:26The reason why you have instead of the actual representation is that the top-level (aka interpreter) doesn't know how to print the num object. It is easy to teach the top-level, using the #install_printer directive, e.g.,
QUESTION
I am starting with a basic Spring Batch getting started example. I have only added one instruction to stop the job in its beggining but I am getting a exception at runtime.
...ANSWER
Answered 2021-Jan-15 at 04:19Please add below in your build.gradle it will go through.
QUESTION
Hello I'm trying to obtain all of the /pubmed/ numbers that link me to the abstract of articles that are from a specific author. The problem is that when I tried to do it, I only obtain the same number over and over again until the for loop its over.
The href that I'm trying to obtain it should be taken from the output of for line in lines loop (the specific href is in the output example). That loop seems to work well but then, the for abstract in abstracts loop only repeat the same href.
Any suggestion or idea what I'm missing or doing wrong. I don't have much experience with bs4 so probably I'm not using the library very well.
...ANSWER
Answered 2020-Mar-14 at 20:34Given that using the URL https://www.ncbi.nlm.nih.gov/pubmed/?term=valvano+MA returns the correct results you can use the following regex example.
QUESTION
First of all, I have those types :
...ANSWER
Answered 2020-Jan-03 at 02:07The problem with fold and iter is that they process nodes in an order that they determine themselves. In essence the order is based on the shape of the map, which is determined by the keys. You want to process the nodes of the map in an order determined by the values in the map.
I'm pretty sure the only way to proceed is to write your own special-purpose recursive function.
Update
In the latest code you have this expression:
QUESTION
Consider the following top-level session that defines a function with a labelled argument f, but does not use the label while calling it:
ANSWER
Answered 2019-Dec-25 at 19:37The difference is that your example has a concrete return type, while find_or_add is polymorphic. Its type signature is:
QUESTION
In F#, I'd simply do:
...ANSWER
Answered 2019-Dec-10 at 11:37There are examples in the documentation for Map showing exactly this.
If you use their PPXs you can just do:
QUESTION
I am trying to build a simple interpreter using the Visitor pattern. I'm having a difficult time trying to understand how a task such as pretty-printing the tree can be implemented using this pattern.
The result I am trying to obtain is printing the AST with proper indentation:
...ANSWER
Answered 2019-May-26 at 16:11There are two versions of the visitor pattern: One version only takes care of the double dispatch and the other also takes care of iteration by automatically visiting a node's children. The latter version is less flexible because you decide what kind of traversal (pre-order or post-order) you want ahead of time instead of leaving that decision to the individual visitor. It also forces you to visit all the nodes exactly once (which you wouldn't want in many cases, such as when implementing an AST interpreter).
In your code you're actually implementing both of those versions: Your Visitor#visit method implements the plain visitor pattern and ASTNode#accept implements the one with iteration. That's a weird use of the accept method because usually the job of the accept method is simply to call a specific visit method (like visit_whatever) on the visitor to get the double dispatch to work. Since you've used reflection to implement the double dispatch, you don't need an accept method at all.
I assume that the printing should be implemented in visit_*Node(subject) methods of PrintVisitor
That is correct.
Printing each node requires additional context to determine the right indentation level.
Also correct. You can keep track of the indentation level by storing it in an instance variable. Then a given visitor method would print its contents with the given amount of indentation, increase the indentation level, visit its child notes, and then decrease the indentation again. Something like this:
QUESTION
I am web scraping abstracts from pubmed.gov and it's working for the most part, except for abstracts that have no text. I tried a IF statement, but I'm clearly not doing something right. How can I do this and have it skip over urls without abstract text? I've provided a URL where this happens.
I'm getting this error: AttributeError: 'NoneType' object has no attribute 'find'
Thanks in advance!
...ANSWER
Answered 2019-May-20 at 15:45As stated in the comments, you cannot do .find() to None, so just check if the first find finds anything.
Just remove the second find:
QUESTION
I am web scraping pubmed.gov abstracts and while I can get the data I need and print it, I can't export it into a Python Pandas export. For some reason, I am only getting the first result when I export it to an Excel file. I appreciate any help! So my question is why am I only getting the first URL and abstract and how would I adjust my code to get all? My code is shown below:
...ANSWER
Answered 2019-May-19 at 05:20Create new list, in loop append output and last pass list of dictionary to DataFrame constructor:
QUESTION
I am web scraping abstracts from Pubmed.gov and while I'm able to get the text I need, the word "abstract" is being combined with the first word of the abstract. Here's a sample abstract: https://www.ncbi.nlm.nih.gov/pubmed/30470520
For example, the first word becomes "AbstractBACKGROUND:"
The problem is that an abstract sometimes could be "AbstractBACKGROUND", "AbstractINTRODUCTION" or another word (I won't know). Nevertheless, it will always have "Abstract" in the beginning. Otherwise, I would just run a replace command and take out the abstract part.
I would prefer to either take out "Abstract" of the word or there to be a line break between Abstract and the first word, like this:
Abstract
INTRODUCTION:
I know using the replace command won't work, but I wanted to demonstrate that as a n00b, I at least tried. I appreciate any help to make this work! Here's my code below:
...ANSWER
Answered 2019-May-18 at 03:47Use re.sub
Ex:
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