invalid index to scalar variable @ mode(days_diffs).mode[0] about alphalens HOT 11 OPEN

似乎作者有其他的办法，但我是通过版本解决的。我的环境如下。
不过呢，环境也不一定能行。我最开始出现这个问题的时候我和别人对其了环境，可是很奇怪，版本都对齐了，我还是不能运行。后面我又找了个人对齐了环境，就能运行了，最后我能用的环境如下：
alphalens 0.4.0
numpy 1.24.4
pandas 1.3.4
Python 3.8.18

from alphalens.

set keepdims=True
delta_days = period_len.components.days - mode(days_diffs, keepdims=True).mode[0]

from alphalens.

set keepdims=True delta_days = period_len.components.days - mode(days_diffs, keepdims=True).mode[0]

Thanks JiwenZ! I haven't try out your solution, but I solved by re-install different version of Pandas or Numpy or Python, i don't know which of it is the factor. Here is a list of enviroment version, which i tested, it can run well:
alphalens 0.4.0
numpy 1.24.4
pandas 1.3.4
Python 3.8.18

from alphalens.

你好，我现在也碰到了跟你一模一样的问题，将factor和price数据表都准备好了，运行get_clean_factor_and_forward_returns函数总是报错IndexError: invalid index to scalar variable，换了好多个数据表，都报这个错，这只能通过降低版本来解决吗？

from alphalens.

pandas 1.4.4 also works

from alphalens.

changed to mode([days_diffs]).mode can also 真 无语

from alphalens.

I am having the same error. Changing to: delta_days = period_len.components.days - mode(days_diffs, keepdims=True).mode[0] or mode([days_diffs]).mode did not work. I get the following error:

AssertionError: Length of new_levels (3) must be <= self.nlevels (2)

Any idea how to solve?

from alphalens.

I am having the same error. Changing to: delta_days = period_len.components.days - mode(days_diffs, keepdims=True).mode[0] or mode([days_diffs]).mode did not work. I get the following error:

AssertionError: Length of new_levels (3) must be <= self.nlevels (2)

Any idea how to solve?

Your mistake is different from mine. Try something else

from alphalens.

I am having the same error. Changing to: delta_days = period_len.components.days - mode(days_diffs, keepdims=True).mode[0] or mode([days_diffs]).mode did not work. I get the following error:

AssertionError: Length of new_levels (3) must be <= self.nlevels (2)

Any idea how to solve?

I modified like that and also found that error, that seems, pandas version should < 2.1(or fix source code too...).
And when I use version 2.0.2, it will raise another error with "TypeError: incompatible index of inserted column with frame index"...

Finally, I use 1.3.4, works fine.

from alphalens.

Make sure you’re on alphalens-reloaded and not alphalens (not supported anymore). The former supports the latest version of pandas, but the latter doesn’t.

from alphalens.

Make sure you’re on alphalens-reloaded and not alphalens (not supported anymore). The former supports the latest version of pandas, but the latter doesn’t.

You're right, I'm just on alphalens, and I find the forked project alphalens-reloaded now, will try that in future, thx.

from alphalens.