python - 解开列表清单[重复项](Unwrap a list of list [duplicate])

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Flattening a shallow list in Python [duplicate] (23 answers) 在Python中弄平浅表[重复] （23个答案）)

Flatten a list in python (7 answers) 扁平化python中的列表 （7个答案）)

Closed 4 hours ago . 4小时前关闭。)

I have this list:

(我有这个清单：)

fxrate = 
[[['9.6587'], ['9.9742'], ['9.9203'], ['10.1165'], ['10.1087']],
 [['10.7391'], ['10.8951'], ['11.1355'], ['11.561'], ['11.7873']],
 [['8.61'], ['8.9648'], ['9.0155'], ['9.153'], ['9.1475']]]

I would like to make a list like this by using Python:

(我想使用Python列出这样的列表：)

[[9.6587, 9.9742, 9.9203, 10.1165, 10.1087],
 [10.7391, 10.8951, 11.1355, 11.561, 11.7873],
 [8.61, 8.9648, 9.0155, 9.153, 9.1475]]

Needless to say I'm fairly new to Python and programming in general.

(毋庸置疑，我对Python和一般编程还是相当陌生的。)

However all I end up with is either one list of values but not at three sets of lists

(但是，我最终得到的只是一个值列表，而不是三组列表)

  ask by victor translate from so

Answer 1

What you want to do is flatten your list, Just use a list comprehension.

(您要做的是将列表弄平，只需使用列表理解即可。)

This will take any list of lists you have and flatten it such that, Your list only has a depth of one.

(这将获取您拥有的任何列表列表，并将其展平，以使您的列表只有一个深度。)

ie [["foo"], ["bar"],["List_of_lists"]] would become ["foo", "bar", "complex_lists"]

(即[["foo"], ["bar"],["List_of_lists"]]将变为["foo", "bar", "complex_lists"])

flat_list = [item for sublist in l for item in sublist]

As specified here

(作为指定在这里)

You can format this into your code as necessary.

(您可以根据需要将此格式设置为代码。)

Like so:

(像这样：)

fxrate = 
   [[['9.6587'], ['9.9742'], ['9.9203'], ['10.1165'], ['10.1087']],
   [['10.7391'], ['10.8951'], ['11.1355'], ['11.561'], ['11.7873']],
   [['8.61'], ['8.9648'], ['9.0155'], ['9.153'], ['9.1475']]]
flat_fxrate = [[item for sublist in fxrate[0] for item in sublist],[item for sublist in fxrate[1] for item in sublist],[item for sublist in fxrate[2] for item in sublist]]

For example.

(例如。)

Since you want it split in three or if you plan to upscale it.

(由于您希望将其拆分为三部分，或者如果您打算对其进行扩展，则可以使用。)

Or to make it more legible, you can use a loop and append each part.

(或者使它更清晰，可以使用循环并附加每个部分。)

Like so.

(像这样)

Note: In general it's a lot better to use a loop because then no matter what the size of this list is, it will always work.

(注意：通常，使用循环会更好，因为无论此列表的大小如何，它都将始终有效。)

flat_fxrate = []
fxrate = 
   [[['9.6587'], ['9.9742'], ['9.9203'], ['10.1165'], ['10.1087']],
   [['10.7391'], ['10.8951'], ['11.1355'], ['11.561'], ['11.7873']],
   [['8.61'], ['8.9648'], ['9.0155'], ['9.153'], ['9.1475']]]
for x in fxrate:
    flat_fxrate.append([item for sublist in x for item in sublist])