IPython%run magic-n开关不工作

我在另一个（家长）笔记本中使用

%run

魔法运行IPython笔记本

如果使用

%run

调用，我想在子笔记本中隐藏一些输出，我想可以通过测试

if\uuuuuuu name\uuuuuuu='\uuuuuu main\uuuu'

IPython文档说明，当使用

%run-n

开关时：

\uuuu name\uuuu

未设置为

\uuuu main\uuuu

，而是设置为运行文件的名称，但不带扩展名（就像python在导入下所做的那样）。这允许运行 脚本并重新加载其中的定义，而不调用代码 受

if

子句保护

然而，它似乎对我不起作用。我试过这个：

在

sub_notebook.ipynb

中：

print(__name__)

%run -n sub_notebook.ipynb

try:
    __file__
    print('I am in an imported notebook')

except NameError:
    print('I am not in an imported notebook')

def has_parent():
    """Return True if this notebook is being run by calling
    %run in another notebook, False otherwise."""
    try:
        __file__
        # __file__ has been defined, so this notebook is 
        # being run in a parent notebook
        return True

    except NameError:
        # __file__ has not been defined, so this notebook is 
        # not being run in a parent notebook
        return False

在

parent\u notebook.ipynb

中：

print(__name__)

%run -n sub_notebook.ipynb

try:
    __file__
    print('I am in an imported notebook')

except NameError:
    print('I am not in an imported notebook')

def has_parent():
    """Return True if this notebook is being run by calling
    %run in another notebook, False otherwise."""
    try:
        __file__
        # __file__ has been defined, so this notebook is 
        # being run in a parent notebook
        return True

    except NameError:
        # __file__ has not been defined, so this notebook is 
        # not being run in a parent notebook
        return False

这会打印

\uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu

请告诉我如何在
sub_notebook.ipynb
中有选择地运行代码，这取决于它是单独运行还是使用
%run

我正在运行iPython6.1.0版
设置
\uuuu file\uuuu
变量，以便我们可以对此进行测试

我们可以在
sub_notebook.ipynb
：

print(__name__)

%run -n sub_notebook.ipynb

try:
    __file__
    print('I am in an imported notebook')

except NameError:
    print('I am not in an imported notebook')

def has_parent():
    """Return True if this notebook is being run by calling
    %run in another notebook, False otherwise."""
    try:
        __file__
        # __file__ has been defined, so this notebook is 
        # being run in a parent notebook
        return True

    except NameError:
        # __file__ has not been defined, so this notebook is 
        # not being run in a parent notebook
        return False

单独运行，打印出
我不在导入的笔记本中

我们可以创建一个父笔记本
父笔记本.ipynb
包含：

%run sub_notebook.ipynb

正确运行此命令将打印出导入的笔记本中的

我们可以在
sub_notebook.ipynb
中编写一个简单的测试：

print(__name__)

%run -n sub_notebook.ipynb

try:
    __file__
    print('I am in an imported notebook')

except NameError:
    print('I am not in an imported notebook')

def has_parent():
    """Return True if this notebook is being run by calling
    %run in another notebook, False otherwise."""
    try:
        __file__
        # __file__ has been defined, so this notebook is 
        # being run in a parent notebook
        return True

    except NameError:
        # __file__ has not been defined, so this notebook is 
        # not being run in a parent notebook
        return False

然后可以保护不应在父笔记本中打印的代码：

if not has_parent():
    print('This will not print in the parent notebook')

快速查看
%run
的源代码可以发现，如果文件名以
.ipy
或
.ipynb
结尾，则该函数甚至在检查
-n
开关之前都会返回。我创造了。