python - 使用 praw 时如何不打印评论或提交中的表情符号

Question

当我尝试打印带有表情符号的评论或提交时收到错误消息。我怎样才能忽略并只打印字母和数字？

使用 Praw 进行网页抓取

top_posts2 = page.top(limit = 25)
for post in top_posts2:
   outputFile.write(post.title)
   outputFile.write('   ')
   outputFile.write(str(post.score))
   outputFile.write('\n')
   outputFile.write(post.selftext)
   outputFile.write('\n')

   submissions = reddit.submission(id = post.id)

   comment_page = submissions.comments
   top_comment = comment_page[0] #by default, this will be the best comment of the post

   commentBody = top_comment.body

   outputFile.write(top_comment.body)
   outputFile.write('\n')

我只想输出字母和数字。也许还有一些特殊字符(或全部)

Answer 1

有几种方法可以做到这一点。我建议创建一种“文本清理”功能

def cleanText(text):
    new_text = ""
    for c in text:       # for each character in the text
        if c.isalnum():  # check if it is either a letter or number (alphanumeric)
            new_text += c
    return new_text

或者如果您想包含特定的非字母数字数字

def cleanText(text):
    valid_symbols = "!@#$%^&*()"    # <-- add whatever symbols you want here
    new_text = ""
    for c in text:       # for each character in the text
        if c.isalnum() or c in valid_symbols:  # check if alphanumeric or a valid symbol
            new_text += c
    return new_text

那么在你的脚本中你可以做类似的事情

commentBody = cleanText(top_comment.body)