patterns | Pattern matching for python
kandi X-RAY | patterns Summary
kandi X-RAY | patterns Summary
Pattern matching for python
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Top functions reviewed by kandi - BETA
- Decorator to transform a function into a function
- Make a subscript
- Return the filename of a function
- Define a name
- Compile the given function
- Make a call from the given function name
- Make an assignment
- Wrap a value into an expression
- Make an AST value
- Make a comparison op
- Return a list of testcases and assignments
- Return the last line number
- Make arguments for Python 2 0
- Takes a pattern and returns a list of testcases
- Return True if expr contains all variables in expr
- Get ast
- Compile a function
- Transform patterns into pattern matching patterns
- Make an inequality expression
patterns Key Features
patterns Examples and Code Snippets
Lines of Code : 27License : Permissive (MIT License)
Copypublic static int[] KnuthMorrisPrattShift(char[] pattern) {
int patternSize = pattern.length;
int[] shift = new int[patternSize];
shift[0] = 1;
int i = 1, j = 0;
while ((i + j) < patternSize) {
public int numberOfPatterns(int m, int n) {
//initialize a 10x10 matrix
int skip[][] = new int[10][10];
//initialize indices of skip matrix (all other indices in matrix are 0 by default)
skip[1][3] = skip[3][1 private String maskMessage(String message) {
if (multilinePattern == null) {
return message;
}
StringBuilder sb = new StringBuilder(message);
Matcher matcher = multilinePattern.matcher(sb);
while (m Community Discussions
Trending Discussions on patterns
QUESTION
I am using the Unit of Work patterns and want to a value back from the database to make sure it has updated the database successfully. Is there a way to do that?
...ANSWER
Answered 2021-Jun-15 at 13:25When you call SubmitChanges(), a transaction is created.
All objects that have pending changes are ordered into a sequence of objects based on the dependencies between them. Objects whose changes depend on other objects are sequenced after their dependencies.
Immediately before any actual changes are transmitted, LINQ to SQL starts a transaction to encapsulate the series of individual commands.
Using the default conflict resolution mode (FailOnFirstConflict), the entirety of your changes fail to save when an error is occurred because the transaction encapsulating all your changes is rolled back.
That means that if your submission succeeds, you can be sure your unit of work was completed. You do not need to get a value back to determine whether or not your changes were saved.
You could also set the conflict resolution mode to ContinueOnConflict if you have changes that you know do not depend on each other and you want all changes to be attempted even if one or more fail.
QUESTION
The following link shows how to add multiple EntityRuler with spaCy. The code to do that is below:
...ANSWER
Answered 2021-Jun-15 at 09:55Imagine that your dataframe is
QUESTION
I'm unable to add the product in cart. I want to see the product is adding to cart or not. but the process is not happening. I'm using Django as backend, PostgresSQL as DB and HTML, CSS and Javascript as backend.
The Codes Goes here:
views.py
PRODUCT DETAIL
ANSWER
Answered 2021-Jun-15 at 04:13You are not calling the save() method.
QUESTION
Say I have the below line in file named "logs_test":
Sample input:
...ANSWER
Answered 2021-Jun-14 at 20:37This will do it for your example (with GNU sed):
QUESTION
Getting "AttributeError: 'function' object has no attribute 'get_extra_actions'" error with Django 3.2.4 and djangorestframework 3.12.4
Logs:
...ANSWER
Answered 2021-Jun-15 at 00:59in your urls.py try setting the urlpatterns like
QUESTION
I was taking freecodecamp.org course on JavaScript data structures, going through the RegExp chapter. I then came across the following assertion:
"The regular expression /(?=\w{3,6})(?=\D*\d)/ will check whether a password contains between 3 and 6 characters and at least one number".
(Here "check" meaning that regExp.test(password) returns true)
This seems odd to me. First of all, looking around in Stack Exchange, I found in this post that states that A(?=B) is the definition of positive lookahead, and it makes no mention that A (the preceeding expression in the parenthesis) is optional. So, shouldn't freecodecamp's example have an expression before the first lookahead?
I believe that this another example is quite similar to the previously mentioned, but simpler so I will mention it in case the explanation is simpler, too:
Why does (?=\w)(?=\d), when checked against the string "1", returns true?, Shouldn't it look for an alphanumeric character followed by a numeric character?
PS: After a thought, I hypothesized that my first example checks both lookahead patterns independently (i.e. first it checks whether the string is made of three to six characters, returns true, then checks whether there is an alpha numeric character, and finally since both searchings returned true, the whole regexp test returns true). But this doesn't seem to be coherent with the definition mentioned in the post I've linked. Is there a more general definition or algorithm which the computer "internally" uses to deal with lookaheads?
...ANSWER
Answered 2021-Jun-14 at 16:03Lookaround are similar to word-boundary metacharacters like \b or the anchors ˆ and $ in that they don’t match text, but rather match positions within the text.
Positive lookahead peeks forward in the text to see if its subexpression can match, and is successful as a regex component if it can. Positive lookahead is specified with the special sequence (?=...).
An important thing to understand about lookaround constructs is that although they go through the motions to see if their subexpression is able to match, they don’t actually “consume” any text.
QUESTION
I am working a SQL Server stored procedure to generate a 10 digits sequence with the following patterns where [CustomerCode] is say 'ABC':
ANSWER
Answered 2021-Jun-14 at 06:21Something like this should do the trick:
QUESTION
How can I ensure fairness in the Pub/Sub Pattern in e.g. kafka when one publisher produces thousands of messages, while all other producers are in a low digit of messages? It's not predictable which producer will have high activity.
It would be great if other messages from other producers don't have to wait hours just because one producer is very very active.
What are the patterns for that? Is it possible with Kafka or another technology like Google PubSub? If yes, how?
Multiple partitions also doesn't work very well in that case, or I can see how.
...ANSWER
Answered 2021-Jun-14 at 01:48In Kafka, you could utilise the concept of quotas to prevent a certain clients to monopolise the cluster resources.
There are 2 types of quotas that can be enforced:
- Network bandwidth quotas
- Request rate quotas
More detailed information on how these can be configured can be found in the official documentation of Kafka.
QUESTION
I using CleanArchitecture solution. I have Data layer where ApplicationDbContext and UnitOfWork are located :
...ANSWER
Answered 2021-Jun-13 at 12:31finally, I found my answers in this article https://snede.net/you-dont-need-a-idesigntimedbcontextfactory/
Create ApplicationDbContextFactory in Portal.Data project:
QUESTION
When defining a syntax, it is possible to match 1 or more times (+) or 0 or more times (*) similarly to how it is done in regex. However, I have not found in the rascal documentation if it is possible to also match a Symbol a specific amount of times. In regex (and Rascal patterns) this is done with an integer between two curly brackets but this doesn't seem to work for syntax definition. Ideally, I'd want something like:
...ANSWER
Answered 2021-Jun-13 at 10:25No this meta syntax does not exist in Rascal. We did not add it.
You could write an over-estimation like this and have a post-parse filter reject more than 5 items:
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
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Install patterns
You can use patterns like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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