我必须在python中找到非ascii字符并将其转换为相同的ascii字符。

# -*- coding: utf-8 -*-

def convert_to_ascii(text):
    ascii_text = ""
    for char in text:
        if ord(char) < 128:
            ascii_text += char
        else:
            ascii_text += "\\u" + str(ord(char)).zfill(4)
    return ascii_text

def convert_to_unicode(text):
    unicode_text = ""
    i = 0
    while i < len(text):
        if text[i] == "\\" and text[i+1] == "u":
            unicode_text += chr(int(text[i+2:i+6], 16))
            i += 6
        else:
            unicode_text += text[i]
            i += 1
    return unicode_text

# 示例用法
text = "你好，世界！"
ascii_text = convert_to_ascii(text)
unicode_text = convert_to_unicode(ascii_text)

print("ASCII文本:", ascii_text)
print("Unicode文本:", unicode_text)