Sideway
output.to from Sideway
Draft for Information Only

Content

Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Flatten a List of Lists
 Sources and References

Flatten a List of Lists

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> [item for sublist in L for item in sublist]
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> import itertools
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> list(itertools.chain(*L))
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> import itertools
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> list(itertools.chain.from_iterable(L))
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> sum(L, [])
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> from functools import reduce
>>> import operator
>>> reduce(operator.concat, L)
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> from functools import reduce
>>> import operator
>>> reduce(operator.iconcat, L, [])
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> X=[]
>>> [X.extend(each) for each in L]
[None, None, None]
>>> X
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> import numpy as np
>>> list(np.array(L).flat)
<stdin>:1: VisibleDeprecationWarning: Creating an ndarray from ragged nested seq
uences (which is a list-or-tuple of lists-or-tuples-or ndarrays with different l
engths or shapes) is deprecated. If you meant to do this, you must specify 'dtyp
e=object' when creating the ndarray.
[1, 2, 3, 4, 5, 6, [7, 8], [9, 0]]
>>>

Flatten a List of Lists

Flatten a List of Lists
Python Code Input:
Python 3.8.1 (tags/v3.8.1:1b293b6, Dec 18 2019, 23:11:46) [MSC v.1916 64 bit (AM
D64)] on win32
>>> L=[[1,2,3],[4,5,6],[[7,8],[9,0]]]
>>> import numpy as np
>>> list(np.concatenate(L))
Traceback (most recent call last):
  File "&lt;stdin&gt;", line 1, in &lt;module&gt;
  File "&lt;__array_function__ internals&gt;", line 5, in concatenate
ValueError: all the input arrays must have same number of dimensions, but the ar
ray at index 0 has 1 dimension(s) and the array at index 2 has 2 dimension(s)
>>>

Sources and References

https://stackoverflow.com/questions/952914/how-to-make-a-flat-list-out-of-a-list-of-lists

©sideway

ID: 211100030 Last Updated: 11/30/2021 Revision: 0


Latest Updated LinksValid XHTML 1.0 Transitional Valid CSS!Nu Html Checker Firefox53 Chromena IExplorerna
IMAGE

Home 5

Business

Management

HBR 3

Information

Recreation

Hobbies 8

Culture

Chinese 1097

English 339

Reference 79

Computer

Hardware 224

Software

Application 213

Digitization 32

Latex 52

Manim 204

KB 1

Numeric 19

Programming

Web 289

Unicode 504

HTML 66

CSS 65

SVG 46

ASP.NET 270

OS 429

DeskTop 7

Python 72

Knowledge

Mathematics

Formulas 8

Algebra 84

Number Theory 206

Trigonometry 31

Geometry 33

Coordinate Geometry 2

Calculus 67

Complex Analysis 21

Engineering

Tables 8

Mechanical

Mechanics 1

Rigid Bodies

Statics 92

Dynamics 37

Fluid 5

Fluid Kinematics 5

Control

Process Control 1

Acoustics 19

FiniteElement 2

Natural Sciences

Matter 1

Electric 27

Biology 1

Geography 1


Copyright © 2000-2022 Sideway . All rights reserved Disclaimers last modified on 06 September 2019