Question

我遵循“学习Python艰难之路”这本书，我正处于exc13。练习如下：

from sys import argv
# read the WYSS section for how to run this
script, first, second, third = argv

print("The script is called:", script)
print("Your first variable is:", first)
print("Your second variable is:", second)
print("Your third variable is:", third)

但是当我运行这个时，我收到了以下错误

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-16-b23ff5448130> in <module>()
      1 from sys import argv
      2 # read the WYSS section for how to run this
----> 3 script, first, second, third = argv
      4 
      5 print("The script is called:", script)

ValueError: not enough values to unpack (expected 4, got 3)

这是因为argv没有填写。书中说使用终端，在终端中你可以输入以下参数传递：

python ex13.py first 2nd 3rd

在终端。但是我怎么能只使用Jupyter笔记本来做到这一点。

Answer 1

在Jupyter Notebook中，您可以使用单元格魔术%%file创建文件。然后，您可以使用单元格魔术%%!向shell发送命令以运行该文件。

写出文件：

%%file ex13.py
from sys import argv
# read the WYSS section for how to run this
script, first, second, third = argv

print("The script is called:", script)
print("Your first variable is:", first)
print("Your second variable is:", second)
print("Your third variable is:", third)

运行文件：

%%!
python ex13.py first 2nd 3rd

您应该会看到您要查找的结果。打印输出被捕获并作为列表返回，每个打印行一个元素。

在Jupyter Notebook中传递参数

1 个答案: