Python, beautiful soup, get all class name

beautifulsoup, class, html, python

Solution

You can treat each `Tag` instance found as a dictionary when it comes to retrieving attributes. Note that `class` attribute value would be a list since `class` is a special "multi-valued" attribute:

classes = []
for element in soup.find_all(class_=True):
    classes.extend(element["class"])

Or:

classes = [value
           for element in soup.find_all(class_=True)
           for value in element["class"]]

Demo:

from bs4 import BeautifulSoup

data = """
<div class="class1">
<span class="class2">some text</span>
<span class="class3">some text</span>
<span class="class4">some text</span>
</div>
"""

soup = BeautifulSoup(data, "html.parser")

classes = [value
           for element in soup.find_all(class_=True)
           for value in element["class"]]

print(classes)

# Returns
# ['class1', 'class2', 'class3', 'class4']

Problem

given an html code lets say: ``` <div class="class1"> <span class="class2">some text</span> <span class="class3">some text</span> <span class="class4">some text</span> </div> ``` How can I retrieve all the class names? ie: ['class1','class2','class3','class4'] I tried: ``` soup.find_all(class_=True) ``` But it retrieves the whole tag and i then need to do some regex on the string

Original source