如何用Beautiful Soup提取链接的最后修改日期

Let's break this down step by step to build the dictionary you want, mapping version numbers to their last modified timestamps:

• First, target the correct <pre> tag: as you noted, the first <pre> is just the header (Name Last modified Size), so we'll focus on the second one (index 1 when using findAll).
• Extract the raw text from that tag, then split it into individual lines. We can ignore the ../ line since it's just the parent directory link.
• For each valid line (like 0.1.0/ 21-Oct-2020 14:06 -), parse the key parts:
  • The version number is the first part, stripped of the trailing /
  • The timestamp is the combination of the next two parts (date + time)
• Finally, assemble these parsed values into your target dictionary.

Full Code Example #

from bs4 import BeautifulSoup
import requests

url = "your-target-url-here"
soup = BeautifulSoup(requests.get(url).content, "html.parser")

# Extract text from the second pre tag and clean up lines
pre_text = soup.findAll("pre")[1].get_text()
lines = [line.strip() for line in pre_text.splitlines() if line.strip() and not line.startswith("../")]

version_timestamp_dict = {}
for line in lines:
    # Split line into components, then extract version and timestamp
    parts = line.split()
    version = parts[0].rstrip("/")
    timestamp = f"{parts[1]} {parts[2]}"
    version_timestamp_dict[version] = timestamp

print(version_timestamp_dict)
# Output: {'0.1.0': '21-Oct-2020 14:06'}

Key Details #

• We clean up the raw text by stripping whitespace from each line and filtering out empty lines and the parent directory link.
• Using rstrip("/") removes the trailing slash from the directory name to get your desired key format (0.1.0 instead of 0.1.0/).
• Combining the second and third split parts gives us the full timestamp string you need.

内容的提问来源于stack exchange，提问作者rchitect-of-info