Hi
I wondering if someone could give me a pointer. I have a dictionary
with the following structure:
testDict = dict(foo=((1,2, 3),(1,4,3)), bar=((3,2,1),(9 ,8,7,)),
mumble=((1,2,3) ,))
I am trying to create a list of the the 3 element tuples using
itertools (just for a bit of fun). I'm trying this:
list(itertools. chain(testDict. itervalues())
but that's doesn't work. I think I need a way to convert the iterator
returned by itervalues() into a sequence of iterables. Any clues?
Thanks
Andy 1 1211
On Jan 9, 1:16 pm, ajcpp...@gmail. com wrote:
Hi
I wondering if someone could give me a pointer. I have a dictionary
with the following structure:
testDict = dict(foo=((1,2, 3),(1,4,3)), bar=((3,2,1),(9 ,8,7,)),
mumble=((1,2,3) ,))
I am trying to create a list of the the 3 element tuples using
itertools (just for a bit of fun). I'm trying this:
list(itertools. chain(testDict. itervalues())
Close! Try:
list(itertools. chain(*testDict .itervalues())
--
Paul Hankin This thread has been closed and replies have been disabled. Please start a new discussion. Similar topics |
by: Francis Avila |
last post by:
Below is an implementation a 'flattening' recursive generator (take a nested
iterator and remove all its nesting). Is this possibly general and useful
enough to be included in itertools? (I know *I* wanted something like it...)
Very basic examples:
>>> rl = , '678', 9]]
>>> list(flatten(rl))
>>> notstring = lambda obj: not isinstance(obj, type(''))
|
by: Francis Avila |
last post by:
A few days ago (see the 'itertools.flatten()?' thread from October 28) I
became obsessed with refactoring a recursive generator that yielded the
leaves of nested iterables. When the dust settled, I had many flatten
functions at hand.
So I had to time them. Results below.
History of the functions (from flattrial.py):
# There are three basic features:
|
by: bearophile |
last post by:
This is my first Python program (it's an improvement of a recursive
version by Luther Blissett). Given a list like this:
, ]]]
It produces the "flatted" version:
I think this operation is quite important, and it's similar to the
built-in Mathematica Flatten function:
l = {{"a", 2, {}, {3, 5, {4}}}}
|
by: Bengt Richter |
last post by:
What am I missing? (this is from 2.4b1, so probably it has been fixed?)
def flatten(list):
l =
for elt in list:
^^^^--must be expecting list instance or other sequence
t = type(elt)
if t is tuple or t is list:
^^^^--looks like it expects to refer to the type, not the arg
|
by: Ville Vainio |
last post by:
For quick-and-dirty stuff, it's often convenient to flatten a sequence
(which perl does, surprise surprise, by default):
]]] ->
One such implementation is at
http://aspn.activestate.com/ASPN/Mail/Message/python-tutor/2302348
| |
by: Tom Anderson |
last post by:
Comrades,
During our current discussion of the fate of functional constructs in
python, someone brought up Guido's bull on the matter:
http://www.artima.com/weblogs/viewpost.jsp?thread=98196
He says he's going to dispose of map, filter, reduce and lambda. He's
going to give us product, any and all, though, which is nice of him.
|
by: Robin Becker |
last post by:
Is there some smart/fast way to flatten a level one list using the
latest iterator/generator idioms.
The problem arises in coneverting lists of (x,y) coordinates into a
single list of coordinates eg
f() --> or
g(,) -->
|
by: psbasha |
last post by:
Hi,
I would like to know what naming conventions we can follow for the following types of variables/sequences :
Variables :
-------------
Integer
Float
Boolean
|
by: beginner |
last post by:
Hi,
I am wondering how do I 'flatten' a list or a tuple? For example, I'd
like to transform or ] to .
Another question is how do I pass a tuple or list of all the
aurgements of a function to the function. For example, I have all the
arguments of a function in a tuple a=(1,2,3). Then I want to pass each
item in the tuple to a function f so that I make a function call
f(1,2,3). In perl it is a given, but in python, I haven't figured out
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
| |
by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
|
by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
|
by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
|
by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
|
by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
| |
by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
| |