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19 python.engineering Last Updated: 5 months

Success 40% of passed verification steps
Warning 30% of total warning
Errors 30% of total errors, require fast action
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Desktop

Mobile

Performance Desktop Score 84%
Best Practices Desktop Score 71%
SEO Desktop Score 91%
Progressive Web App Desktop Score 37%
Performance Mobile Score 70%
Best Practices Mobile Score 71%
SEO Mobile Score 100%
Progressive Web App Mobile Score 39%
Page Authority Authority 4%
Domain Authority Domain Authority 1%
Moz Rank 0.4/10
Bounce Rate Rate 0%
Charset Encoding
Great, language/character encoding is specified: UTF-8
Title Tag 122 Characters
THE BEST BIG DATA & MACHINE LEANING BOOKS: 2020 REVIEW. LEARN PYTHON PROGRAMMING WITH FREE PDF BOOKS AT PYTHON.ENGINEERING
Meta Description 162 Characters
The best Big Data & Machine Leaning books: 2020 review — get the best Python ebooks for free. Machine Learning, Data Analysis with Python books for beginners
Effective URL 25 Characters
http://python.engineering
Excerpt Page content
The best Big Data & Machine Leaning books: 2020 review. Learn Python programming with free PDF books at Python.Engineering ...
Keywords Cloud Density
hadoop7 architect6 cloud5 dummies5 books5 оборудования5 python5 best4 development4 learning4
Keyword Consistency Keyword density is one of the main terms in SEO
Keyword Freq Title Desc Domain H1 H2
hadoop 7
architect 6
cloud 5
dummies 5
books 5
оборудования 5
python 5
best 4
development 4
learning 4
Google Preview Your look like this in google search result
THE BEST BIG DATA & MACHINE LEANING BOOKS: 2020 REVIEW. LEAR
http://python.engineering
The best Big Data & Machine Leaning books: 2020 review — get the best Python ebooks for free. Machine Learning, Data Analysis with Python books f
Robots.txt File Detected
http://python.engineering/robots.txt
Sitemap.xml File Detected
http://python.engineering/sitemap.xml
Whois Is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system
Updated: 2020-06-12 / 9 months
Create on: 2020-06-07 / 9 months
Expires on: 2021-06-07 / 3 months 2 days

NameCheap, Inc. ,PA
Registrar Name: REDACTED FOR PRIVACY
Registrar Whois Server: whois.namecheap.com
Registrar URL: https://www.namecheap.com/
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Registrar Email: Please
Registrar Address: REDACTED FOR PRIVACY , REDACTED FOR PRIVACY

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Nameservers
noah.ns.cloudflare.com
gabriella.ns.cloudflare.com
Page Size Code & Text Ratio
Document Size: ~25.2 KB
Code Size: ~18.66 KB
Text Size: ~6.54 KB Ratio: 25.94%

Estimation Traffic and Earnings

8
Unique Visits
Daily
14
Pages Views
Daily
$0
Income
Daily
224
Unique Visits
Monthly
399
Pages Views
Monthly
$0
Income
Monthly
2,592
Unique Visits
Yearly
4,704
Pages Views
Yearly
$0
Income
Yearly

Technologies

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PWA - Manifest

Manifest is not valid
Your site don't have valid manifest.json, read more in Web App Manifest

Desktop

Desktop Screenshot
Largest Contentful Paint element 1 element found
This is the largest contentful element painted within the viewport
Avoids large JavaScript libraries with smaller alternatives 0 large libraries found
Large JavaScript libraries can lead to poor performance. Prefer smaller, functionally equivalent libraries to reduce your bundle size
Keep request counts low and transfer sizes small 34 requests • 1,897 KiB
To set budgets for the quantity and size of page resources, add a budget.json file
Avoid chaining critical requests 14 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Remove unused JavaScript Potential savings of 20 KiB
Remove unused JavaScript to reduce bytes consumed by network activity
First Meaningful Paint 0.9 s
First Meaningful Paint measures when the primary content of a page is visible
Efficiently encode images Potential savings of 63 KiB
Optimized images load faster and consume less cellular data
Avoid large layout shifts 3 elements found
These DOM elements contribute most to the CLS of the page.
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Does not use HTTPS 30 insecure requests found
All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding [mixed content](https://developers.google.com/web/fundamentals/security/prevent-mixed-content/what-is-mixed-content), where some resources are loaded over HTTP despite the initial request being servedover HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs
Includes front-end JavaScript libraries with known security vulnerabilities 9 vulnerabilities detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Initial server response time was short Root document took 450 ms
Keep the server response time for the main document short because all other requests depend on it
First CPU Idle 0.9 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle/).
Eliminate render-blocking resources Potential savings of 820 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Speed Index 0.9 s
Speed Index shows how quickly the contents of a page are visibly populated
Estimated Input Latency 10 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
Minify JavaScript Potential savings of 4 KiB
Minifying JavaScript files can reduce payload sizes and script parse time
Avoids an excessive DOM size 195 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
Minimizes main-thread work 0.3 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Max Potential First Input Delay 20 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Properly size images Potential savings of 1,416 KiB
Serve images that are appropriately-sized to save cellular data and improve load time
Minimize third-party usage Third-party code blocked the main thread for 0 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
First Contentful Paint 0.8 s
First Contentful Paint marks the time at which the first text or image is painted
Minify CSS Potential savings of 5 KiB
Minifying CSS files can reduce network payload sizes
Time to Interactive 0.9 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Serve static assets with an efficient cache policy 27 resources found
A long cache lifetime can speed up repeat visits to your page
Cumulative Layout Shift 0.145
Cumulative Layout Shift measures the movement of visible elements within the viewport
Largest Contentful Paint 2.6 s
Largest Contentful Paint marks the time at which the largest text or image is painted
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Remove unused CSS Potential savings of 21 KiB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity
Avoids enormous network payloads Total size was 1,897 KiB
Large network payloads cost users real money and are highly correlated with long load times
JavaScript execution time 0.0 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Serve images in next-gen formats Potential savings of 1,413 KiB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
Total Blocking Time 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds

Mobile

Mobile Screenshot
First Contentful Paint (3G) 5871 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network
Minify CSS Potential savings of 5 KiB
Minifying CSS files can reduce network payload sizes
Avoids enormous network payloads Total size was 1,968 KiB
Large network payloads cost users real money and are highly correlated with long load times
Avoid long main-thread tasks 5 long tasks found
Lists the longest tasks on the main thread, useful for identifying worst contributors to input delay
Efficiently encode images Potential savings of 63 KiB
Optimized images load faster and consume less cellular data
Serve static assets with an efficient cache policy 28 resources found
A long cache lifetime can speed up repeat visits to your page
Serve images in next-gen formats Potential savings of 1,413 KiB
Image formats like JPEG 2000, JPEG XR, and WebP often provide better compression than PNG or JPEG, which means faster downloads and less data consumption
Tap targets are sized appropriately 100% appropriately sized tap targets
Interactive elements like buttons and links should be large enough (48x48px), and have enough space around them, to be easy enough to tap without overlapping onto other elements
Initial server response time was short Root document took 450 ms
Keep the server response time for the main document short because all other requests depend on it
Minimize third-party usage Third-party code blocked the main thread for 250 ms
Third-party code can significantly impact load performance. Limit the number of redundant third-party providers and try to load third-party code after your page has primarily finished loading
Time to Interactive 4.0 s
Time to interactive is the amount of time it takes for the page to become fully interactive
Max Potential First Input Delay 160 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task
Remove unused CSS Potential savings of 22 KiB
Remove dead rules from stylesheets and defer the loading of CSS not used for above-the-fold content to reduce unnecessary bytes consumed by network activity
Minimizes main-thread work 1.6 s
Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this
Does not use HTTPS 31 insecure requests found
All sites should be protected with HTTPS, even ones that don't handle sensitive data. This includes avoiding [mixed content](https://developers.google.com/web/fundamentals/security/prevent-mixed-content/what-is-mixed-content), where some resources are loaded over HTTP despite the initial request being servedover HTTPS. HTTPS prevents intruders from tampering with or passively listening in on the communications between your app and your users, and is a prerequisite for HTTP/2 and many new web platform APIs
Remove unused JavaScript Potential savings of 20 KiB
Remove unused JavaScript to reduce bytes consumed by network activity
First Contentful Paint 2.9 s
First Contentful Paint marks the time at which the first text or image is painted
Speed Index 3.7 s
Speed Index shows how quickly the contents of a page are visibly populated
Properly size images Potential savings of 1,275 KiB
Serve images that are appropriately-sized to save cellular data and improve load time
Avoid chaining critical requests 14 chains found
The Critical Request Chains below show you what resources are loaded with a high priority. Consider reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load
Total Blocking Time 140 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds
Server Backend Latencies 0 ms
Server latencies can impact web performance. If the server latency of an origin is high, it's an indication the server is overloaded or has poor backend performance
Avoids large JavaScript libraries with smaller alternatives 0 large libraries found
Large JavaScript libraries can lead to poor performance. Prefer smaller, functionally equivalent libraries to reduce your bundle size
First Meaningful Paint 3.3 s
First Meaningful Paint measures when the primary content of a page is visible
Keep request counts low and transfer sizes small 35 requests • 1,968 KiB
To set budgets for the quantity and size of page resources, add a budget.json file
Avoid large layout shifts 1 element found
These DOM elements contribute most to the CLS of the page.
Avoids an excessive DOM size 195 elements
A large DOM will increase memory usage, cause longer [style calculations](https://developers.google.com/web/fundamentals/performance/rendering/reduce-the-scope-and-complexity-of-style-calculations), and produce costly [layout reflows](https://developers.google.com/speed/articles/reflow)
JavaScript execution time 0.6 s
Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this
Eliminate render-blocking resources Potential savings of 2,630 ms
Resources are blocking the first paint of your page. Consider delivering critical JS/CSS inline and deferring all non-critical JS/styles
Estimated Input Latency 10 ms
Estimated Input Latency is an estimate of how long your app takes to respond to user input, in milliseconds, during the busiest 5s window of page load. If your latency is higher than 50 ms, users may perceive your app as laggy
Network Round Trip Times 0 ms
Network round trip times (RTT) have a large impact on performance. If the RTT to an origin is high, it's an indication that servers closer to the user could improve performance
Preload key requests Potential savings of 300 ms
Consider using `<link rel=preload>` to prioritize fetching resources that are currently requested later in page load
Includes front-end JavaScript libraries with known security vulnerabilities 9 vulnerabilities detected
Some third-party scripts may contain known security vulnerabilities that are easily identified and exploited by attackers
Largest Contentful Paint element 1 element found
This is the largest contentful element painted within the viewport
Largest Contentful Paint 6.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted
First CPU Idle 3.4 s
First CPU Idle marks the first time at which the page's main thread is quiet enough to handle input. [Learn more](https://web.dev/first-cpu-idle/).
Minify JavaScript Potential savings of 4 KiB
Minifying JavaScript files can reduce payload sizes and script parse time
Document uses legible font sizes 100% legible text
Font sizes less than 12px are too small to be legible and require mobile visitors to “pinch to zoom” in order to read. Strive to have >60% of page text ≥12px

Speed And Optimization Tips

Website speed has a huge impact on performance, affecting user experience, conversion rates and even rankings. ‪‬‬By reducing page load-times, users are less likely to get distracted and the search engines are more likely to reward you by ranking you
Title Website
Warning! Your title is not optimized
Description Website
Warning! Your description is not optimized
Robots.txt
Congratulations! Your site have a robots.txt file
Sitemap.xml
Congratulations! We've found a sitemap file for your website
SSL Secure
Congratulations! Your site have Support to HTTPS
Headings
Congratulations! You are using your H1 and H2 tags in your site
Blacklist
Congratulations! Your site is not listed in a blacklist
W3C Validator
Warning! Your site have errors W3C
Accelerated Mobile Pages (AMP)
Warning! Your site not have AMP Version
Domain Authority
Warning! Domain Authority of your website is slow. It is good to have domain authority more than 25.
GZIP Compress
Warning! Your site not is compressed, this can make slower response for the visitors
Favicon
Warning! Your site not have a favicon
Broken Links
Warning! You have broken links View links
First 13 Links Relationship HTTP Status
http://python.engineering/ Internal Link 200
Architect Internal Link 404
Development Internal Link 200
Cloud Internal Link 404
For Dummies Internal Link 200
Hadoop Internal Link 404
E-BOOKS Internal Link 200
Latest news Internal Link 404
Analytics Internal Link 404
Become an author and write for us Internal Link 404
Analysis Internal Link 404
Apache Internal Link 404
Python Internal Link 404

Information Server

Response Header HTTP headers carry information about the client browser, the requested page and the server 
HTTP/1.1 200 OK
Date: Fri, 25 Sep 2020 16:31:14 GMT
Content-Type: text/html; charset=UTF-8
Connection: keep-alive
Set-Cookie: __cfduid=d6e20eb79f432b818534030e090ce8e241601051473; expires=Sun, 25-Oct-20 16:31:13 GMT; path=/; domain=.python.engineering; HttpOnly; SameSite=Lax
X-Powered-By: PHP/7.1.33
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate
Pragma: no-cache
Link: ; rel="https://api.w.org/", ; rel=shortlink
Set-Cookie: PHPSESSID=1c2010657802fdacf9a1329ee7ca542b; path=/
CF-Cache-Status: DYNAMIC
cf-request-id: 0567b3ced00000cdb7b026d200000001
Server: cloudflare
CF-RAY: 5d86225e1ce4cdb7-CDG
Content-Encoding: gzip
DNS Records DNS Resource Records associated with a hostname
View DNS Records
Type Name Value Class TTL
A python.engineering 104.31.71.165 IN 102
A python.engineering 172.67.181.212 IN 102
A python.engineering 104.31.70.165 IN 102
NS python.engineering noah.ns.cloudflare.com IN 85038
NS python.engineering gabriella.ns.cloudflare.com IN 85038
AAAA python.engineering 2606:4700:3030::ac43:b5d4 IN 101
AAAA python.engineering 2606:4700:3033::681f:46a5 IN 101
AAAA python.engineering 2606:4700:3035::681f:47a5 IN 101

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