将HTML写入数据库时常用的解决方案：
1)只需将数据库字段类型转换为blob，以便它接受二进制数据，然后将HTML编码为二进制(示例如下)。
2) 将数据库字段保留为文本字段，但base64对数据进行编码，这样数据库就不会抱怨非法字符。在# Example for case 1.
# Note that you need to make sure the database field is a blob:
html = '
Welcome!
\nSome text
'
bin = html.encode()
dbhandle.execute('INSERT INTO script (various fields, binhtml) VALUES (..., bin)')
# When you read back the data, remember to decode.
dbhandle.execute('SELECT binhtml FROM script WHERE...')
resultset = dbhandle.fetchall()
htmlresult = resultset.decode()
# Example for case 2.
# Database field can be a text/varchar type because base64 ensures it will work.
import base64
html = '
Welcome!
\nSome text
'
# Convert HTML into base64 encoded *text* so it can be stored in text field.
encoded = base64.b64decode(html.encode()).decode()
# Do the database INSERT.
...
# Retrieve the stored text from the database and convert back to HTML
dbhandle.execute('SELECT encodedhtml FROM script WHERE...')
resultset = dbhandle.fetchall()
htmlresult = base64.b64decode(resultset).decode()
