Python调用YouTube API按地区筛选视频时非英语视频问题及region_code报错求助

Hey there! Let's work through your two issues step by step—they're both fixable with a few tweaks to your code and a better grasp of how the YouTube API works.

1. Fixing the 'US' is undefined error #

This error happens because Python interprets US as a variable name instead of a string value. You just need to make sure you pass the region code as a quoted string when calling your search_video function.

• If you're hardcoding the region:

  # Correct: wrap 'US' in single or double quotes
  videoids = search_video("your_target_keyword", "US", comments)
  

• If you're getting the region from user input:

  # Input returns a string by default, no extra quotes needed
  region_code = input("Enter region code (e.g., US): ")
  videoids = search_video("your_target_keyword", region_code, comments)
  

2. Fixing unexpected video languages & broken category logic #

Your current code has two key issues causing mismatched results:

A. Your category ID function isn't working as intended

Right now, get_category_id just returns the first category ID it finds in the region—completely ignoring the cat (keyword) parameter you pass. That means you're likely searching videos from a random category, not the one you want.

Here's a fixed version that actually matches the category name you specify:

def get_category_id(youtube, category_name, region_code):
    req = youtube.videoCategories().list(part='snippet', regionCode=region_code)
    response = req.execute()
    # Match category name (case-insensitive to avoid typos)
    for item in response["items"]:
        if item["snippet"]["title"].lower() == category_name.lower():
            return item["id"]
    # Return None if no matching category is found
    return None

Update your search function to pass the region code to this helper, and make sure you're passing a valid category name (like "Music" or "Gaming") as the keyword argument to search_video.

B. Region code doesn't filter video language

The region_code parameter prioritizes content popular in that region, but it doesn't force videos to be in the region's primary language. To filter for English videos specifically, add the relevanceLanguage='en' parameter to your search request, plus include regionCode=region_code to tie results to the US region:

req = youtube.search().list(
    videoCategoryId=video_category_id,
    order='date',
    maxResults=len(comments),
    publishedAfter=(datetime.datetime.utcnow() + datetime.timedelta(minutes = -1)).isoformat('T')+'Z',
    part='snippet',
    type='video',
    # Add these two lines to lock in region and language
    regionCode=region_code,
    relevanceLanguage='en'
)

Quick Final Checks #

• Ensure you're passing a valid category name (not a video keyword) to search_video (e.g., use "Gaming" if you want gaming videos)
• If you still see occasional non-English videos, you can add an extra check to filter results by the snippet.language field in the API response, but relevanceLanguage should handle most cases.

内容的提问来源于stack exchange，提问作者JaxxGoyu