如何去除Base64解码输出中的b''标识？

运行以下Python代码：

import base64

a = "aHR0cHM6Ly9kaXNjb3JkLmNvbS9hcGkvd2ViaG9va3MvMTA2MTQ2NzIxNDI2MTI2MDMwOC9wNklOLWgzVkRGSEo1UVIyNDVSXy1NUFlWZ2xfU2tRZ3RUemVPMUN2SGlUZlBSMEExSjhOQUdHVmt0NU1sZzhrYXVkRg=="
hook = base64.b64decode(a)

print(hook)

返回结果为：

b'https://discord.com/api/webhooks/1061467214261260308/p6IN-h3VDFHJ5QR245R_-MPYVgl_SkQgtTzeO1CvHiTfPR0A1J8NAGGVkt5Mlg8kaudF'

需要仅返回字符串https://discord.com/api/webhooks/1061467214261260308/p6IN-h3VDFHJ5QR245R_-MPYVgl_SkQgtTzeO1CvHiTfPR0A1J8NAGGVkt5Mlg8kaudF，而非带b''的字节形式。

解决办法 #

方法1：调用字节对象的decode()方法 #

base64解码后得到的是字节对象，调用decode()方法可将其转为字符串，默认使用UTF-8编码，适配URL这类文本：

import base64

a = "aHR0cHM6Ly9kaXNjb3JkLmNvbS9hcGkvd2ViaG9va3MvMTA2MTQ2NzIxNDI2MTI2MDMwOC9wNklOLWgzVkRGSEo1UVIyNDVSXy1NUFlWZ2xfU2tRZ3RUemVPMUN2SGlUZlBSMEExSjhOQUdHVmt0NU1sZzhrYXVkRg=="
hook = base64.b64decode(a).decode()  # 追加decode()方法

print(hook)

方法2：解码时指定encoding参数（Python 3.10+） #

从Python 3.10开始，base64.b64decode()支持直接传入encoding参数，一步生成字符串：

import base64

a = "aHR0cHM6Ly9kaXNjb3JkLmNvbS9hcGkvd2ViaG9va3MvMTA2MTQ2NzIxNDI2MTI2MDMwOC9wNklOLWgzVkRGSEo1UVIyNDVSXy1NUFlWZ2xfU2tRZ3RUemVPMUN2SGlUZlBSMEExSjhOQUdHVmt0NU1sZzhrYXVkRg=="
hook = base64.b64decode(a, encoding='utf-8')  # 指定编码参数

print(hook)

方法3：打印时直接转换类型 #

如果不想修改变量本身的类型，可在打印环节直接转换为字符串：

import base64

a = "aHR0cHM6Ly9kaXNjb3JkLmNvbS9hcGkvd2ViaG9va3MvMTA2MTQ2NzIxNDI2MTI2MDMwOC9wNklOLWgzVkRGSEo1UVIyNDVSXy1NUFlWZ2xfU2tRZ3RUemVPMUN2SGlUZlBSMEExSjhOQUdHVmt0NU1sZzhrYXVkRg=="
hook = base64.b64decode(a)

print(str(hook, encoding='utf-8'))  # 转换为字符串后打印

内容的提问来源于stack exchange，提问作者DeVYuvi