我正在尝试运行下面的简单片段
port = int(os.getenv('PORT'))
print("Starting app on port %d" % port)
我可以理解PORT是s字符串，但是我需要转换为int。为什么我得到错误
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
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我正在尝试运行下面的简单片段
port = int(os.getenv('PORT'))
print("Starting app on port %d" % port)
我可以理解PORT是s字符串，但是我需要转换为int。为什么我得到错误
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
You don't have an environment variable called
PORT.os.getenv('PORT')-> returnsNone-> throws exception when you try to convert it to int在运行脚本之前，请通过以下步骤在终端中创建环境变量：
It is highly likely that, you forgot to
export PORT. Hence there's no PORT in the env, hence it returnsNone.