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‎course_contents/12_browser_automation_selenium/lectures/10_implicit_and_explicit_waits/slide.html

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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8" />
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<meta
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name="viewport"
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content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no"
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/>
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<title>Code</title>
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<link rel="stylesheet" href="../css/reset.css" />
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<link rel="stylesheet" href="../css/reveal.css" />
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<link rel="stylesheet" href="../css/theme/teclado.css" />
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<!-- Theme used for syntax highlighting of code -->
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<link rel="stylesheet" href="../lib/css/monokai.css" />
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<!-- Printing and PDF exports -->
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<script>
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var link = document.createElement("link");
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link.rel = "stylesheet";
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link.type = "text/css";
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link.href = window.location.search.match(/print-pdf/gi)
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? "../css/print/pdf.css"
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: "../css/print/paper.css";
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document.getElementsByTagName("head")[0].appendChild(link);
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</script>
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</head>
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<body>
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<div class="reveal">
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<img src="../img/logo.svg" class="logo" />
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<div class="blog-link">https://blog.tecla.do</div>
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<div class="slides">
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<!-- Each slide is a `section`. Duplicate the whole thing and modify the code and `data-line-numbers` for highlighting. -->
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<section data-transition="none">
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<h1>Explicit waits</h1>
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<pre><code data-trim data-line-numbers>
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import time
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time.sleep(5) # 5 seconds
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</code></pre>
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</section>
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<!-- End duplication -->
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<section data-transition="slide-in none">
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<h1>Explicit waits</h1>
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<pre><code data-trim data-line-numbers="1-3">
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support import expected_conditions
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from selenium.webdriver.support.wait import WebDriverWait
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WebDriverWait(self.browser, 10).until(
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expected_conditions.presence_of_element_located(
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(By.CSS_SELECTOR, QuotesPageLocators.TAG_DROPDOWN_VALUE_OPTION)
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)
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)
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</code></pre>
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</section>
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<section data-transition="none">
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<h1>Explicit waits</h1>
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<pre><code data-trim data-line-numbers="5">
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support import expected_conditions
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from selenium.webdriver.support.wait import WebDriverWait
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WebDriverWait(self.browser, 10).until(
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expected_conditions.presence_of_element_located(
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(By.CSS_SELECTOR, QuotesPageLocators.TAG_DROPDOWN_VALUE_OPTION)
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)
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)
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</code></pre>
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</section>
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<section data-transition="none">
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<h1>Explicit waits</h1>
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<pre><code data-trim data-line-numbers="6">
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support import expected_conditions
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from selenium.webdriver.support.wait import WebDriverWait
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WebDriverWait(self.browser, 10).until(
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expected_conditions.presence_of_element_located(
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(By.CSS_SELECTOR, QuotesPageLocators.TAG_DROPDOWN_VALUE_OPTION)
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)
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)
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</code></pre>
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</section>
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<section data-transition="none">
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<h1>Explicit waits</h1>
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<pre><code data-trim data-line-numbers="7">
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support import expected_conditions
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from selenium.webdriver.support.wait import WebDriverWait
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WebDriverWait(self.browser, 10).until(
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expected_conditions.presence_of_element_located(
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(By.CSS_SELECTOR, QuotesPageLocators.TAG_DROPDOWN_VALUE_OPTION)
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)
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)
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</code></pre>
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</section>
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<section data-transition="slide-in none">
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<h1>Locators using By</h1>
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<pre><code data-trim data-line-numbers="3,8">
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from selenium.webdriver.common.by import By
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TAG_DROPDOWN = "select#tag"
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JUST_ID = By.ID, "tag"
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...
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self.browser.find_element_by_css_selector(TAG_DROPDOWN)
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self.browser.find_element(By.CSS_SELECTOR, TAG_DROPDOWN)
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self.browser.find_element_by_id("tag")
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self.browser.find_element(By.ID, "tag")
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self.browser.find_element(*JUST_ID)
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</code></pre>
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</section>
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<section data-transition="none">
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<h1>Locators using By</h1>
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<pre><code data-trim data-line-numbers="3,9">
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from selenium.webdriver.common.by import By
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TAG_DROPDOWN = "select#tag"
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JUST_ID = By.ID, "tag"
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...
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self.browser.find_element_by_css_selector(TAG_DROPDOWN)
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self.browser.find_element(By.CSS_SELECTOR, TAG_DROPDOWN)
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self.browser.find_element_by_id("tag")
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self.browser.find_element(By.ID, "tag")
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self.browser.find_element(*JUST_ID)
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</code></pre>
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</section>
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<section data-transition="none">
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<h1>Locators using By</h1>
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<pre><code data-trim data-line-numbers="4, 11-13">
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from selenium.webdriver.common.by import By
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TAG_DROPDOWN = "select#tag"
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JUST_ID = By.ID, "tag"
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...
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self.browser.find_element_by_css_selector(TAG_DROPDOWN)
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self.browser.find_element(By.CSS_SELECTOR, TAG_DROPDOWN)
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self.browser.find_element_by_id("tag")
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self.browser.find_element(By.ID, "tag")
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self.browser.find_element(*JUST_ID)
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</code></pre>
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</section>
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<section>
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<h1>Other uses of By</h1>
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<pre><code data-trim>
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ID = "id"
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XPATH = "xpath"
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LINK_TEXT = "link text"
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PARTIAL_LINK_TEXT = "partial link text"
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NAME = "name"
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TAG_NAME = "tag name"
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CLASS_NAME = "class name"
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CSS_SELECTOR = "css selector"
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</code></pre>
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</section>
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<section>
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<h1>Implicit waits</h1>
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<pre><code data-trim data-line-numbers="4">
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from selenium import webdriver
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driver = webdriver.Chrome()
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driver.implicitly_wait(10) # seconds
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</code></pre>
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</section>
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</div>
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</div>
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<script src="../js/reveal.js"></script>
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<script>
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// More info about config & dependencies:
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// - https://github.com/hakimel/reveal.js#configuration
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// - https://github.com/hakimel/reveal.js#dependencies
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Reveal.initialize({
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width: "100%",
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height: "100%",
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margin: 0,
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dependencies: [
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{ src: "../plugin/markdown/marked.js" },
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{ src: "../plugin/markdown/markdown.js" },
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{ src: "../plugin/notes/notes.js", async: true },
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{ src: "../plugin/highlight/highlight.js", async: true }
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]
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});
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</script>
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</body>
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</html>

‎course_contents/12_browser_automation_selenium/lectures/11_adding_waits_to_our_code/pages/quotes_page.py

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@@ -1,3 +1,4 @@
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import time
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from typing import List
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support import expected_conditions
@@ -60,8 +61,8 @@ def search_for_quotes(self, author_name: str, tag_name: str) -> List[QuoteParser
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)
6162
)
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63-
# Alternatively, implicit wait
64-
self.browser.implicitly_wait(10)
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# Alternatively, explicit wait
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time.sleep(10)
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try:
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self.select_tag(tag_name)

‎course_contents/12_browser_automation_selenium/lectures/1_our_scraping_code/locators/quotes_page_locators.py

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class QuotesPageLocators:
22
QUOTE = "div.quote"
3-
AUTHOR_DROPDOWN = "select#author"
4-
TAG_DROPDOWN = "select#tag"
5-
SEARCH_BUTTON = 'input[name="submit_button"]'

‎course_contents/12_browser_automation_selenium/lectures/3_using_chrome_in_scraping_code/locators/quotes_page_locators.py

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Original file line numberDiff line numberDiff line change
@@ -1,2 +1,2 @@
11
class QuotesPageLocators:
2-
QUOTE = 'div.quote'
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QUOTE = "div.quote"

‎course_contents/12_browser_automation_selenium/lectures/5_interacting_with_dropdowns/pages/quotes_page.py

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from typing import List
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from selenium.webdriver.support.ui import Select
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34
from locators.quotes_page_locators import QuotesPageLocators

‎course_contents/12_browser_automation_selenium/lectures/9_adding_some_error_handling/app.py

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@@ -13,5 +13,6 @@
1313
print(page.search_for_quotes(author, tag))
1414
except InvalidTagForAuthorError as e:
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print(e)
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except Exception:
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except Exception as e:
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print(e)
1718
print("An unknown error occurred. Please try again.")

‎course_contents/16_interacting_with_apis/lectures/3_getting_all_exchange_rates/code.py

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import requests
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APP_ID = "c640347fae594fc5add36046c807b282"
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ENDPOINT = "https://openexchangerates.org/api/latest.json"
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response = requests.get(f"{ENDPOINT}?app_id={APP_ID}")
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exchange_rates = response.json()
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usd_amount = 1000
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gbp_amount = usd_amount * exchange_rates["rates"]["GBP"]
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print(f"USD{usd_amount} is GBP{gbp_amount}")

‎course_contents/16_interacting_with_apis/lectures/4_creating_a_currency_exchange_library/app.py

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from libs.openexchange import OpenExchangeClient
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APP_ID = "72dba35060b54cf9ad3ffbdc68de9174"
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client = OpenExchangeClient(APP_ID)
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usd_amount = 1000
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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print(f"USD{usd_amount} is GBP{gbp_amount}")

‎course_contents/16_interacting_with_apis/lectures/4_creating_a_currency_exchange_library/libs/__init__.py

Whitespace-only changes.

‎course_contents/16_interacting_with_apis/lectures/4_creating_a_currency_exchange_library/libs/openexchange.py

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import requests
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import functools
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class OpenExchangeClient:
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BASE_URL = "https://openexchangerates.org/api/"
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def __init__(self, app_id):
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self.app_id = app_id
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@property
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def latest(self):
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return requests.get(f"{self.BASE_URL}/latest.json?app_id={self.app_id}").json()
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def convert(self, from_amount, from_currency, to_currency):
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rates = self.latest['rates']
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to_rate = rates[to_currency]
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if from_currency == 'USD':
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return from_amount * to_rate
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else:
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from_in_usd = from_amount / rates[from_currency]
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return from_in_usd * to_rate
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‎course_contents/16_interacting_with_apis/lectures/5_caching_with_cachetools/app.py

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from libs.openexchange import OpenExchangeClient
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import time
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APP_ID = "72dba35060b54cf9ad3ffbdc68de9174"
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client = OpenExchangeClient(APP_ID)
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usd_amount = 1000
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start = time.time()
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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print(f'First call took {time.time() - start} seconds.')
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start = time.time()
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
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gbp_amount = client.convert(usd_amount, 'USD', 'GBP')
26+
print(f'After, 10 calls took {time.time() - start} seconds.')
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print(f"USD{usd_amount} is GBP{gbp_amount}")

‎course_contents/16_interacting_with_apis/lectures/5_caching_with_cachetools/libs/__init__.py

Whitespace-only changes.

‎course_contents/16_interacting_with_apis/lectures/5_caching_with_cachetools/libs/openexchange.py

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import requests
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from cachetools import cached, TTLCache
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class OpenExchangeClient:
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BASE_URL = "https://openexchangerates.org/api/"
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def __init__(self, app_id):
9+
self.app_id = app_id
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11+
@property
12+
@cached(cache=TTLCache(maxsize=2, ttl=900))
13+
def latest(self):
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return requests.get(f"{self.BASE_URL}/latest.json?app_id={self.app_id}").json()
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16+
def convert(self, from_amount, from_currency, to_currency):
17+
rates = self.latest['rates']
18+
to_rate = rates[to_currency]
19+
20+
if from_currency == 'USD':
21+
return from_amount * to_rate
22+
else:
23+
from_in_usd = from_amount / rates[from_currency]
24+
return from_in_usd * to_rate
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‎course_contents/16_interacting_with_apis/lectures/6_functools_lru_cache/code.py

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@@ -0,0 +1,18 @@
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import functools
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import time
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4+
5+
@functools.lru_cache(2)
6+
def cached_function(value):
7+
for i in range(value):
8+
i ** value
9+
10+
11+
def timed():
12+
start = time.time()
13+
cached_function(4647)
14+
print(time.time() - start)
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timed()
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timed()

‎course_contents/19_gui_development_tkinter/lectures/10_saving_files/app.py

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,6 @@ def create_file():
77
text_area.pack(fill="both", expand=True)
88

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notebook.add(text_area, text="Untitled")
10-
notebook.pack(fill="both", expand=True)
1110
notebook.select(text_area)
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1312

@@ -16,8 +15,8 @@ def save_file():
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1716
try:
1817
filename = file_path.split("/")[-1]
19-
current = root.nametowidget(notebook.select())
20-
content = current.get("1.0", "end-1c")
18+
text_widget = root.nametowidget(notebook.select())
19+
content = text_widget.get("1.0", "end-1c")
2120

2221
with open(file_path, "w") as file:
2322
file.write(content)
@@ -47,6 +46,7 @@ def save_file():
4746
file_menu.add_command(label="Save", command=save_file)
4847

4948
notebook = ttk.Notebook(main)
49+
notebook.pack(fill="both", expand=True)
5050

5151
create_file()
5252

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