如何从ASCII转换为Hex,反之亦然？

# ASCII转换为Hex
def ascii_to_hex(text):
    hex_text = ""
    for char in text:
        hex_text += hex(ord(char))[2:] + " "
    return hex_text.strip()

# 测试
text = "Hello World!"
hex_text = ascii_to_hex(text)
print(hex_text)

# Hex转换为ASCII
def hex_to_ascii(hex_text):
    ascii_text = ""
    hex_list = hex_text.split()
    for hex_value in hex_list:
        ascii_text += chr(int(hex_value, 16))
    return ascii_text

# 测试
hex_text = "48 65 6c 6c 6f 20 57 6f 72 6c 64 21"
text = hex_to_ascii(hex_text)
print(text)