Najlepsze treści / dla programistów / po polsku

blog.furas.pl · python/turtle

Prędkość żółwia w Turtle

Normalnie żółw rysuje powoli każdą linię kawałek po kawałku (wykonująć wiele małych kroków) import turtle length = 1 for i in range(200): turtle.forward(length) turtle.right(90) le...

05.01.2020 blog.furas.pl

blog.furas.pl · python/opencv

Problem z wczytaniem pliku haarcascades w OpenCV

Czasami tutorial wczytuje plik haarcascades zainstalowany z OpenCV w ten sposób eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml') ale gdy my uruchamiamy taki kod import nu...

04.01.2020 blog.furas.pl

blog.furas.pl · python/opencv

OpenCV: error: (-215:Assertion failed) !_img.empty() in function 'imwrite' [GB]

Error cv2.error: OpenCV(4.1.2) /io/opencv/modules/imgcodecs/src/loadsave.cpp:715: error: (-215:Assertion failed) !_img.empty() in function 'imwrite' means you try to write empty ar...

04.01.2020 blog.furas.pl

blog.furas.pl · python/tkinter

Przypisanie funkcji z argumentami do Button w Tkinter

Normalnie command= w Button oczekuje "callback" co oznacza nazwę funkcji bez () i bez argumentów - ale czasami jest potrzeba przyspisania funkcji z argumentem i wtedy można do tego...

04.01.2020 blog.furas.pl

blog.furas.pl · python/opencv

OpenCV: error: (-215:Assertion failed) !_img.empty() in function 'imwrite' [PL]

Błąd cv2.error: OpenCV(4.1.2) /io/opencv/modules/imgcodecs/src/loadsave.cpp:715: error: (-215:Assertion failed) !_img.empty() in function 'imwrite' oznacza, że próbujesz zapisać pu...

04.01.2020 blog.furas.pl

blog.furas.pl · python/tkinter

Assign function with arguments to Button in Tkinter

Normally command= in Button expects "callback" - it means function's name without () and without arguments - but sometimes it is needed to assign function with argument and then yo...

04.01.2020 blog.furas.pl

blog.furas.pl · python/opencv

Problem to load file haarcascades in OpenCV [GB]

Sometimes tutorial loads haarcascades file installed with OpenCV like this eye_cascade = cv2.CascadeClassifier('haarcascade_eye.xml') but when we run code import numpy as np import...

04.01.2020 blog.furas.pl

solutionchaser.com · front-end

Podstawy TypeScript #2 - typowanie dla zielonych

Szczęśliwego Nowego Roku! Mam nadzieje, że przerwa świąteczno-noworoczna była okazją do odpoczynku. Wróciłam z zdwojoną siła i entuzjazmem!Serdecznie zapraszam do czytania drugiej...

03.01.2020 solutionchaser.com

blog.furas.pl · python scraping

Python: How to scrape aastocks.com with requests

It is example code to scrape it: # date: 2019.09.16 # https://stackoverflow.com/questions/57861715/scrapy-infinite-scrolling-no-pagination-indication # http://www.aastocks.com impo...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape allegro.pl with scrapy

It is example code to scrape it: # date: 2017.12.10 # https://stackoverflow.com/a/47744135/1832058 import scrapy #from allegro.items import AllegroItem #class AllegroItem(scrapy.It...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape alloschool.com with scrapy

It is example code to scrape it: #!/usr/bin/env python3 # date: 2019.07.29 # https://stackoverflow.com/questions/57245315/using-scrapy-how-to-download-pdf-files-from-some-extracted...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape amazon.com (1) with requests, lxml

It is example code to scrape it: import requests from lxml import html import json # date: 2017.12.22 # https://stackoverflow.com/a/47935432/1832058 url = "http://www.amazon.com/dp...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape amazon.com (2) with selenium

It is example code to scrape it: #!/usr/bin/env python3 # date: 2020.03.30 import selenium.webdriver url = 'https://www.amazon.com/international-sales-offers/b/?ie=UTF8&node=155296...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape api.weatherflow.com with requests

It is example code to scrape it: #!/usr/bin/env python3 # date: 2020.02.10 # import requests url = 'https://api.weatherflow.com/wxengine/rest/model/getModelDataBySpot?model_id=-1&s...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape aopa.org with selenium

It is example code to scrape it: # https://stackoverflow.com/questions/60601053/python-selenium-for-loop-iterates-through-entire-website/60601428 from selenium import webdriver imp...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape apps.upenn.edu with selenium

It is example code to scrape it: #!/usr/bin/env python3 # date: 2020.02.26 # import selenium.webdriver def scrape(last_name, first_name): url = 'https://directory.apps.upenn.edu/di...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape associatedrealtorsaruba.com with requests

It is example code to scrape it: #!/usr/bin/env python3 # date: 2020.01.07 # https://stackoverflow.com/questions/59632031/how-to-extract-href-when-href-element-is-a-hyperlink?nored...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape associatedrealtorsaruba.com with selenium

It is example code to scrape it: #!/usr/bin/env python3 # date: 2020.01.07 # https://stackoverflow.com/questions/59632031/how-to-extract-href-when-href-element-is-a-hyperlink?nored...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape ausrealtimefueltype.global-roam.com with requests

It is example code to scrape it: #!/usr/bin/env python3 # date: 2020.01.17 # https://stackoverflow.com/questions/59779978/python-requests-output-is-different-to-expected-output/ im...

01.01.2020 blog.furas.pl

blog.furas.pl · python scraping

Python: How to scrape automationpractice.com with selenium

It is example code to scrape it: from selenium import webdriver from selenium.webdriver.common.keys import Keys from selenium.webdriver.common.by import By from selenium.webdriver....

01.01.2020 blog.furas.pl