为什么 print(__name__) 给出 'builtins'? [英] Why does print(__name__) give 'builtins'?

问题描述

我正在使用 pycharm.2017.1.2.我在 py3 环境中安装了 anaconda2.在 Pycharm 中，我使用的是 Python3 解释器，代码很简单:

I'm using pycharm.2017.1.2. I installed anaconda2 with py3 environment. in Pycharm, I'm using Python3 interpreter, and the code is simply:

print(__name__)

在 Pycharm 的 Python 控制台中，它会打印 builtins.

In Python console in Pycharm, it prints builtins.

如果我单击运行"按钮，它会按预期打印 main.

If I click the 'run' button, it prints main as expected.

为什么 PyCharm Python 控制台打印 builtin 而不是 main?

Why does the PyCharm Python console print builtin instead of main?

推荐答案

PyCharm Python 控制台实际上正在运行一个名为 pydevconsole.py 的模块(应该位于 C:\Program Files\JetBrains\PyCharm2017.1.2\helpers\pydev\pydevconsole.py).此模块创建一个解释器并将其设置为 builtins 模块的属性.

PyCharm Python console is actually running a module called pydevconsole.py (should be located in C:\Program Files\JetBrains\PyCharm 2017.1.2\helpers\pydev\pydevconsole.py). This module creates an interpreter and sets it as an attribute to the builtins module.

因此 print(__name__) 在 PyCharm 控制台上将显示 builtins.

Thus print(__name__) on PyCharm console will show builtins.

在执行期间(当您单击运行"时)，将调用您指定的 Python 解释器，而不是 pydevconsole 模块.因此 print(__name__) 按预期显示 __main__.

During execution (when you click 'run'), your specified Python interpreter is called, not the pydevconsole module. therefore print(__name__) shows __main__ as expected.

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