如何在python中将电子邮件地址的第一个单词改为大写

email = "example@email.com"
username, domain = email.split("@")

username = username.title()

new_email = "@".join([username, domain])

def capitalize_first_word(email):
    username, domain = email.split("@")
    username = username.title()
    new_email = "@".join([username, domain])
    return new_email

email = "example@email.com"
new_email = capitalize_first_word(email)
print(new_email)  # 输出: "Example@email.com"