gain | Web crawling framework based on asyncio | Crawler library
kandi X-RAY | gain Summary
kandi X-RAY | gain Summary
Web crawling framework for everyone. Written with asyncio, uvloop and aiohttp.
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Top functions reviewed by kandi - BETA
- Start spider
- Execute the given URL
- Perform a GET request
- Task worker
- Parse abstract URLs
- Check if the parser is running
- Add URLs to filter list
- Parses a single item
- Parse html
- Add a value
- Parse the given url
- Parse RFC1738 arguments
gain Key Features
gain Examples and Code Snippets
Lines of Code : 90
License : No License
Copypublic interface Prototype {
Object copy();
}
@EqualsAndHashCode
@NoArgsConstructor
public abstract class Beast implements Prototype {
public Beast(Beast source) {
}
@Override
public abstract Beast copy();
}
@EqualsAndHashCode(callSupe const axios = require('axios').default;
// axios. will now provide autocomplete and parameter typings
const axios = require('axios').default;
// Make a request for a user with a given ID
axios.get('/user?ID=12345')
.then(function (response) {
#!/usr/bin/env python
from ina219 import INA219
from ina219 import DeviceRangeError
SHUNT_OHMS = 0.1
MAX_EXPECTED_AMPS = 0.2
def read():
ina = INA219(SHUNT_OHMS, MAX_EXPECTED_AMPS)
ina.configure(ina.RANGE_16V)
print("Bus Voltage: %.3f def audio_microfrontend(audio,
sample_rate=16000,
window_size=25,
window_step=10,
num_channels=32,
upper_band_limit=7500.0,
def calc_profit(profit: list, weight: list, max_weight: int) -> int:
"""
Function description is as follows-
:param profit: Take a list of profits
:param weight: Take a list of weight if bags corresponding to the profits
:param def adjust_gamma(image, gamma=1, gain=1):
"""Performs [Gamma Correction](http://en.wikipedia.org/wiki/Gamma_correction).
on the input image.
Also known as Power Law Transform. This function converts the
input images at first to float repres full_time = t.stop()
import astar
>>> for i in range(0, 4):
... print(i)
...
0
1
2
3
>>>
list.append(astar.full_time) # append inserts at thdef show_all(mainCanvas):
region = mainCanvas.bbox('all')
old_width = region[2] - region[0]
old_height = region[3] - region[1]
print('old:', old_width, old_height)
new_width = mainCanvas.winfo_width()
neset_of_points = {}
while True
# get size of set
a = len(set_of_points)
# generate new point according to some rule
z = generate()
# try to add z to the set
set_of_points.add(z)
b = len(set_of_points)
# if a ==for YearItem in years:
for item in months:
# variable 'vars1' is assigned a new tuple in every iteration.
# 1. iteration: vars1 = ('01 JAN 2020')
# 2. iteration: vars1 = ('01 FEB 2020')
Community Discussions
Trending Discussions on gain
QUESTION
When using ls -l, I noticed that directories start with 2 hard links, and gain one for each subdirectory. I understand that the current directory link . counts as one link and the parent directory link .. of each subdirectory counts as a hard link, but:
Why don't subfiles count towards hard links when subdirectories do?
Why does the parent directory link
..count as a hard link for both this directory and the parent directory?
ANSWER
Answered 2021-Jun-15 at 20:37Assume the following directory tree
QUESTION
I'm trying to understand best practices for Golang concurrency. I read O'Reilly's book on Go's concurrency and then came back to the Golang Codewalks, specifically this example:
https://golang.org/doc/codewalk/sharemem/
This is the code I was hoping to review with you in order to learn a little bit more about Go. My first impression is that this code is breaking some best practices. This is of course my (very) unexperienced opinion and I wanted to discuss and gain some insight on the process. This isn't about who's right or wrong, please be nice, I just want to share my views and get some feedback on them. Maybe this discussion will help other people see why I'm wrong and teach them something.
I'm fully aware that the purpose of this code is to teach beginners, not to be perfect code.
Issue 1 - No Goroutine cleanup logic
...ANSWER
Answered 2021-Jun-15 at 02:48It is the
mainmethod, so there is no need to cleanup. Whenmainreturns, the program exits. If this wasn't themain, then you would be correct.There is no best practice that fits all use cases. The code you show here is a very common pattern. The function creates a goroutine, and returns a channel so that others can communicate with that goroutine. There is no rule that governs how channels must be created. There is no way to terminate that goroutine though. One use case this pattern fits well is reading a large resultset from a database. The channel allows streaming data as it is read from the database. In that case usually there are other means of terminating the goroutine though, like passing a context.
Again, there are no hard rules on how channels should be created/closed. A channel can be left open, and it will be garbage collected when it is no longer used. If the use case demands so, the channel can be left open indefinitely, and the scenario you worry about will never happen.
QUESTION
I am trying to install all needed modules for an existing Django project. When I run pip install -r requirements.txt I get the following errors:
ANSWER
Answered 2021-Jan-26 at 13:05Inside your requirements.txt change scipy line with this scipy==1.6.0 and save. Now retry pip installation.
QUESTION
Hey, I am working on putting up a rocket rest api with a mongodb database.
I have been able to create a successful connection to the MongoDB Atlas and put the resulting client into the state management of rocket via the manage builder function like this:
ANSWER
Answered 2021-Jun-14 at 20:39This has been resolved. See above for the solution. It is marked with a header saying solution.
QUESTION
I'm creating an int (32 bit) vector with 1024 * 1024 * 1024 elements like so:
...ANSWER
Answered 2021-Jun-14 at 17:01Here are some techniques.
Loop UnrollingQUESTION
I have a Google Sheet (Excel formulas apply) containing 2000 transactions that are structured like below:
Link to Google Sheet with example calcs here.
I need to calculate the Profit (ie. FIFO Capital Gains) for every sell order and place this amount in the 5th column (as pictured). This can be achieved with either traditional formulas or with a Google App Script. Preferably in Google Sheets.
I'm finding it difficult via formulas to match the sell order with the buy as you proceed down the table as some sell orders are split across multiple buy lines. If anyone could help with a formula or solution to tackle this problem it would be much appreciated. This is an updated question to the original here.
...ANSWER
Answered 2021-Jun-13 at 10:44Screenshot below refers:
Google sheets here
IMPORTANT UPDATE: re: 2000+ rows, see link in my last comment (for OneDrive template, s.t. expiry, and bottom of this proposal for screenshot of error "too large to import")
fyi: (Office 365 - Excel - fns. such as 'filter' etc., so #Name! will be ubiquitous upon opening this link; however, sharing this should serve as a convenient means to replicate above screenshot in the correct version of Excel)
REQUIREMENTS- Office 365
- Adequate space to the right or ability to utilise extra sheet for calcs as req.
High-level | Take-aways
• Relies on 2 additional tables: Qty 'depletion' table (here - G:P) and corresp. Profit Vectors (here - R:Z)
• Compressed representations (2x2 tables, per Summary Tables, here: rows 19:32) could be explored to simplify matters (albeit these are still Work in Progress ['WiP'])
• VB could be attractive alternative too
Low-level | Procedural
- Single-cell function could not be found without exceptional complication (however, suspect it could be possible e.g. using FilterXML?)
- Qty label transposes filtered negative quantities (grey shaded, G3: J3)
- These values are depleted in turn (from left to right, i.e. dependency on having data sorted in ascending order by date (in this depiction, data first sorted by 'fruit' as these are assumed to be independent in the context of the profit calc.)
- For example, -5 quantity (G3) offset by +10 (B3) to yield +5 which, in turn contributes towards the -35 qty (H3) to yield -30. No further contribution can be made (left to right); next row (5): +20 avail (given), no offset against -5 (G3, already 'reimbursed', so 20 offset against -30 (H4) to yield -10, and so forth.
- Worksheet set up to accommodate longer list of fruit / profits
- Result table of residual 'quantities' (~ G:J) applied to price differential to yield 'profit vectors' (R:U) which are summed against corresponding negative quantities to produce Profit score (yellow shaded cells)
Salient functions (all of which should be available within Google Sheet, but for completeness):
1) Profit calc. (E4, drag down):
QUESTION
MDN says:
The yield keyword causes the call to the generator's next() method to return an IteratorResult object with two properties: value and done. The value property is the result of evaluating the yield expression, and done is false, indicating that the generator function has not fully completed.
I ran a test in Chrome 91.0.4472.77 and it appears to be a fresh object every single time. Which seems very wasteful if the processing is fine grained (high numbers of iterations, each with low computation). To avoid unpredictable throughput and GC jank, this is undesirable.
To avoid this, I can define an iterator function, where I can control (ensure) the reuse of the {value, done} object by each next() causing the property values to be modified in place, ie. there's no memory allocation for a new {value, done} object.
Am I missing something, or do generators have this inherent garbage producing nature? Which browsers are smart enough to not allocate a new {value, done} object if all I do is const {value, done} = generatorObject.next(); ie. I can't possibly gain a handle on the object, ie. no reason for the engine to allocate a fresh object?
ANSWER
Answered 2021-Jun-13 at 03:59It is a requirement of the ECMAScript specification for generators to allocate a new object for each yield, so all compliant JS engines have to do it.
It is possible in theory for a JS engine to reuse a generator's result object if it can prove that the program's observable behavior would not change as a result of this optimization, such as when the only use of the generator is in a const {value, done} = generatorObject.next() statement. However, I am not aware of any engines (at least those that are used in popular web browsers) that do this. Optimizations like this are a very hard problem in JavaScript because of its dynamic nature.
QUESTION
I'm trying to connect to a server and earn the banner, but I'm not succeeding.
My script runs in theory as follows:
Get port and IP but I can use port e IP static on variables.
Execute the socket, with timeout 7
If connected
Wait the response e use the handle <> to get banner
Execute print to show banner.
ANSWER
Answered 2021-Jun-12 at 00:51http protocol expects a request from a client before it sends any reply.
Try the following code snippet with ip address of your http server.
QUESTION
QUESTION: What, if anything, could cause an SQLite trigger to only run some of the time?
SUMMARY: I'm getting seemingly inconsistent results from a new trigger I've written in SQLite and I'd like to understand if this is happening because I've made a mistake in my SQL/Java code or if I've possibly encountered a rare scenario where SQL triggers may not work as expected.
DETAILS: While working on an Android project I have encountered what I originally perceived to be a problem with an SQLite trigger. However, since my new trigger exactly matches several other working triggers in the same project (except for the table names) I am beginning to wonder if my Java code is the issue instead.
The purpose of the trigger I am having trouble with is to monitor changes to TableA, such as the addition of a value in the DismissDateUTC column for example. When an update is made to any data in TableA, the trigger is supposed to put the ID of that updated TableA record into TableAChanges which is later used to determine which records were updated and should be sent back to a web server.
When using the database inspector (in Android Studio v4.2.1) or the program “DB Browser for SQLite” and running an update query on TableA manually, the trigger works exactly as expected and records appear in TableAChanges. When I make updates to TableA programmatically, the trigger does not appear to run. I believe it is not running because no records are written to TableAChanges after updates have been written to TableA.
Things I have tried so far:
- Running the app on an Android 7.1.1 device (trigger is NOT working)
- Running the app on an Android 8.1.0 device (trigger is NOT working)
- Running the app on an Android 11 device (trigger is NOT working)
- Running manual update query on TableA from Android Studio DB Inspector (trigger IS working)
- Running manual update query on TableA from DB Browser for SQLite (trigger IS working)
- Running manual update query on TableA from Android Debug Database by “amitshekhar” (trigger IS working)
The Tables and Trigger SQL:
...ANSWER
Answered 2021-Jun-11 at 17:25The reason that the trigger does not work is because it is an AFTER UPDATE trigger, which means that it will work only after the table is updated.
On the other hand, replaceOrThrow() does not update the table.
It is actually executing an INSERT OR REPLACE INTO... or simply REPLACE INTO... statement which either inserts a new row in the table if the new ID does not already exist in the table, or if it exists, deletes the row that contains the existing ID and inserts the new row.
QUESTION
I'm trying to write a function I'm frequently in my dissertation but having a hard time getting it to run.
The code works but then fails once I run the function, I think, because of how R reads in the designated variable via the embracing function options. Here is the successful code for one variable, prburden and a link to sample data:
...ANSWER
Answered 2021-Jun-11 at 05:48Try this function -
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