def clean_user_input(user_input):
    replacements = {
        "  ": " ",  # 将双空格替换为单空格
        "\t": " ",  # 将制表符替换为空格
        "\n": " ",  # 将换行符替换为空格
        "&": "and",  # 将&符号替换为and
        "@": "at",  # 将@符号替换为at
    }

    # 替换
    cleaned_input = user_input
    for old, new in replacements.items():
        cleaned_input = cleaned_input.replace(old, new)
    # 去除收尾空格
    cleaned_input = cleaned_input.strip()
    return cleaned_input


dirty_input = "Hello  world\t\n&@test"
clean_result = clean_user_input(dirty_input)
print("清洗前:", repr(dirty_input))
print("清洗后:", repr(clean_result))


def replace_email_template(template, user_data):
    for key, val in user_data.items():
        template = template.replace(f"{{{key}}}", val)

    return template


# 定义邮件模板
email_template = """
Dear {name},

Thank you for your order #{order_id}.
Your total amount is ${amount}.

Best regards,
Customer Service
"""

# 定义用户数据
user_data = {"name": "Alice", "order_id": "12345", "amount": "99.99"}

final_email = replace_email_template(email_template, user_data)
print(final_email)


email_template = """
Dear {name},

Thank you for your order #{order_id}.
Your total amount is ${amount}.

Best regards,
Customer Service
"""

# 定义用户数据
user_data = {"name": "Alice", "order_id": "12345", "amount": "99.99"}

# 使用 `format()` 方法替换模板中的占位符
email = email_template.format(**user_data)

print(email)