Lookahead | Very simple implementation of lookahead optimizer in pytorch | Machine Learning library

 by   KruskalLin Python Version: Current License: No License

kandi X-RAY | Lookahead Summary

kandi X-RAY | Lookahead Summary

Lookahead is a Python library typically used in Artificial Intelligence, Machine Learning, Pytorch applications. Lookahead has no bugs, it has no vulnerabilities and it has low support. However Lookahead build file is not available. You can download it from GitHub.

Codes have been rewritten since the original author has publicized the codes. Below is a visual analysis among the four optimizers.
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    Quality
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            kandi-support Support

              Lookahead has a low active ecosystem.
              It has 5 star(s) with 1 fork(s). There are no watchers for this library.
              OutlinedDot
              It had no major release in the last 6 months.
              Lookahead has no issues reported. There are no pull requests.
              It has a neutral sentiment in the developer community.
              The latest version of Lookahead is current.

            kandi-Quality Quality

              Lookahead has no bugs reported.

            kandi-Security Security

              Lookahead has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

            kandi-License License

              Lookahead does not have a standard license declared.
              Check the repository for any license declaration and review the terms closely.
              OutlinedDot
              Without a license, all rights are reserved, and you cannot use the library in your applications.

            kandi-Reuse Reuse

              Lookahead releases are not available. You will need to build from source code and install.
              Lookahead has no build file. You will be need to create the build yourself to build the component from source.

            Top functions reviewed by kandi - BETA

            kandi has reviewed Lookahead and discovered the below as its top functions. This is intended to give you an instant insight into Lookahead implemented functionality, and help decide if they suit your requirements.
            • Cost function for cost function
            • Evaluate f2 function
            • Perform a step
            • Resets the gradient of the optimizer
            Get all kandi verified functions for this library.

            Lookahead Key Features

            No Key Features are available at this moment for Lookahead.

            Lookahead Examples and Code Snippets

            No Code Snippets are available at this moment for Lookahead.

            Community Discussions

            QUESTION

            Lookahead in regular expressions
            Asked 2021-Jun-14 at 17:03

            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 16:03
            Definitions

            Lookaround 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 (?=...).

            Lookaround do not cosume text

            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.

            Examples

            Source https://stackoverflow.com/questions/67971883

            QUESTION

            regex negative lookback to anywhere in the line
            Asked 2021-Jun-13 at 18:05

            I'm trying to create a regex expression for use with Notepad++ to look for a specific character anywhere in the line but not capture it while still capturing what I want to find later in the string.

            A sample of what I'm looking at is this:

            ...

            ANSWER

            Answered 2021-Jun-13 at 18:05

            QUESTION

            RegEx matching on episode titles with different resolution suffixes
            Asked 2021-Jun-13 at 18:00

            I'm trying to capture the show name, episode number, episode title, and resolution if present. Standard def episodes in my collection don't have a resolution suffix.

            For the given samples:

            ...

            ANSWER

            Answered 2021-Jun-13 at 16:21

            QUESTION

            Sigil editor: Regex string to look for a (hyphen) character in text, but not html attributes
            Asked 2021-Jun-06 at 10:42

            My problem: I use Sigil to edit xhtml files of an ebook.

            When exporting from InDesign to ePub I tick option to remove forced line breaks. This act removes all - hyphen characters which are auto-generated by InDesign, but the characters which were added manually during my word-break fine-tune remain in the text. Current ability of Sigil search: searching by - parses everything, including css class names.

            TODO: How to construct regex query which finds the - within the text, but not in the html code? Thank you!

            What I have already tried: https://www.mobileread.com/forums/showpost.php?p=4099971&postcount=169:

            Here is a simple example to find the word "title" not inside a tag itself, here is the simplest regex search I could think of off the top of my head. It assumes there is no bare text in the body tag and that the xhtml is well formed.

            I tried it and it appears to work. There are probably better more exhaustive regex, that can handle even broken xhtml.

            Code:

            ...

            ANSWER

            Answered 2021-Jun-06 at 10:42

            In Sigil, PCRE regex engine is used.

            Thus, you can use

            Source https://stackoverflow.com/questions/67846197

            QUESTION

            Matching words except for before a character
            Asked 2021-Jun-05 at 01:05

            I have tried to figure it out but couldn't find a solution myself. I want to write a regex for Javascript that matches everything unless it is followed by a hyphen. So if I match among:

            ...

            ANSWER

            Answered 2021-Jun-05 at 00:55

            In regex, you can use the metacharacter \b to designate word boundaries. I have not yet had a case use for it, although I recently noticed the feature as a useful one. Sure enough, one of its use cases is listed for purposes as follows: "Between two characters in the string, where one is a word character and the other is not a word character." This is according to website https://www.regular-expressions.info/wordboundaries.html, which is fairly consistent with overviews on the standard documentation pages for applying Javascript regex.

            Source https://stackoverflow.com/questions/67845348

            QUESTION

            Regex to remove all instance of letter outside of quotes
            Asked 2021-Jun-04 at 18:49

            I have a string of text:

            ...

            ANSWER

            Answered 2021-Jun-04 at 18:49

            QUESTION

            Regex negative lookahead is not working properly
            Asked 2021-Jun-01 at 20:18

            I have the following javascript code

            ...

            ANSWER

            Answered 2021-Jun-01 at 20:18

            The are more ways to match a string in JavaScript, and even more ways to break the pattern as this is very very brittle.

            For the example data in the question, using a negative lookahead to assert that the next line does not start with the .map part or a string:

            Source https://stackoverflow.com/questions/67792197

            QUESTION

            How to match slashes globally in regex except if it is at the start of the string
            Asked 2021-May-31 at 17:12

            Hello stackoverflowers,

            i couldn't figure the solution out by myself and couldn't find a related answer so i seek your help :)

            I'm working in a VB.Net 4.x environment where i usualy have to join windows styled paths from various sources that are very unreliable in its format (leading slashes, ending slashes, sometimes double slashes inside) hence i can't use Path.Join

            My next best guess is to regex replace any double occurance of a backward slash with a single one: \\+

            which is too naive, as it also converts a server adress which starts with a leading double backslash.

            pseudocode

            ...

            ANSWER

            Answered 2021-May-31 at 14:47

            QUESTION

            Regex that matches newlines literally and passively
            Asked 2021-May-31 at 10:58

            I have to construct a regex that matches client codes that look like:

            • XXX/X{3,6}
            • XXX.X{3,6}
            • XXX.X{3,6}/XXX

            With X a number between 0 and 9.

            The regex needs to be strong enough so we don't extract codes that are within another string. The use of word boundaries was my first idea. The regex looks like this: \b\d{3}[\.\/]\d{3,6}(?:\/\d{3})?\b

            The problem with word boundaries is that it also matches dots. So a number like "123/456.12" would match "123/456" as the client number. So then I came up with the following regex: (?. It uses lookbehind and lookahead and checks if that character is a white space. This matches most of the client codes correctly.

            But there is still one last issue. We are using a Google OCR text to extract the codes from. This means that a valid code can be found in the text like 123/456\n, \n123/456, \n123/456\n, etc. Checking if the previous and or next characters are white space doesn't work because the literal "\n" is not included in this. If I do something like (? as the word boundary it also includes a back and/or forward slash for some reason. Currently I came up with the following regex (?, but that only checks if the previous character is a "n" or white space and the next a backslash or white space. So strings like "lorem\123/456" would still find a match. I need some way to include the "\n" in the white space characters without breaking the lookahead/lookbehind.

            Do you guys have any idea how to solve this issue? All input is appreciated. Thx!

            ...

            ANSWER

            Answered 2021-May-31 at 10:58

            It seems you want to subtract \n from the whitespace boundaries. You can use

            Source https://stackoverflow.com/questions/67772218

            QUESTION

            regEx rule negative
            Asked 2021-May-30 at 04:57

            i am struggling with RegEx, i want to target all elements in a text that have ";" or "?" or ":" or "!", and then i want to split that text according to theses elements . So it it like doing myText.split('?') and myText.split(';') and myText.split(':')..but ALL at the same time using a regex rule.

            it is quite easy and theses special characters stand on their own, all i have to do is :

            ...

            ANSWER

            Answered 2021-May-30 at 04:57

            It sounds like you want to split some input text based on sentences. One option would be a find all approach using match. This avoids the needs for a lookbehind.

            Source https://stackoverflow.com/questions/67757792

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network

            Vulnerabilities

            No vulnerabilities reported

            Install Lookahead

            You can download it from GitHub.
            You can use Lookahead 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.

            Support

            For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .
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