在Jupyter Notebook中使用管道进行Awk打印无法使用iPython [英] Awk print with pipes not working iPython in Jupyter Notebook

问题描述

因此，以下命令在使用iPython的Jupyter Notebook中没有任何输出:

So the command below does not give me any output in Jupyter Notebook with iPython:

IP = '62.172.72.131'
!cat hits.csv | grep {IP} | awk '{print $1}'

我已经尝试了双号和单号"$"，但都没有用.如果我在命令中仅使用一个管道，则可以正常工作.例如:

I have tried both double and single "$" sign and none of them works. If I only use one pipe in the command, it works fine. For example:

IP = '62.172.72.131'
!cat hits.csv | grep {IP}
!cat hits.csv | awk '{print $1}'

有人知道为什么会这样吗? 谢谢！

Anyone know why this is happening? Thanks!

推荐答案

我想我明白了.在iPython中，"$"，"{"和}"都是特殊字符，因此我必须通过将它们加倍来对其进行转义.

I think I figured this out. The "$" and "{" and "}" are all special characters in iPython, so I have to escape them by doubling them.

IP = '62.172.72.131'
!cat hits.csv | grep {IP} | awk '{{print $$1}}'

这篇关于在Jupyter Notebook中使用管道进行Awk打印无法使用iPython的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！