473,218 Members | 1,701 Online

# List to Tuple and Tuple to List?

Hi all,

I am curious about whether there is function to fransform pure List to
pure Tuple and pure Tuple to pure List?

For example,

I have list L = [[1,2,3],[4,5,6]]
something list2tuple() will have T=list2tuple(L)=((1,2,3),(4,5,6))

And the tuple2list()

Any suggestions are welcome!

Best regards,
Davy

Nov 6 '07 #1
3 1861
On Nov 6, 11:18 am, Davy <zhushe...@gmail.comwrote:
Hi all,

I am curious about whether there is function to fransform pure List to
pure Tuple and pure Tuple to pure List?

For example,

I have list L = [[1,2,3],[4,5,6]]
something list2tuple() will have T=list2tuple(L)=((1,2,3),(4,5,6))

And the tuple2list()
Assuming you only want to look inside the types that you're
replacing...

def transform(source, from_type, to_type):
if not isinstance(source, from_type):
return source
else:
for x in source)

def list2tuple(source):
return transform(source, list, tuple)

def tuple2list(source):
return transform(source, tuple, list)

--
Paul Hankin
Nov 6 '07 #2
Davy wrote:
Hi all,

I am curious about whether there is function to fransform pure List to
pure Tuple and pure Tuple to pure List?

For example,

I have list L = [[1,2,3],[4,5,6]]
something list2tuple() will have T=list2tuple(L)=((1,2,3),(4,5,6))

And the tuple2list()

Any suggestions are welcome!
D = { list : tuple, tuple : list }

F = lambda x : D[type(x)](map(F,x)) if type(x) in D else x

list2tuple = tuple2list = F
Nov 6 '07 #3
Davy wrote:
Hi all,

I am curious about whether there is function to fransform pure List to
pure Tuple and pure Tuple to pure List?
Isn't that just the same topic as in your other thread? I think it is
somewhat unfriendly that you ignore that one. It makes me feel that you
see this group as some sort of helpdesk.

Which it isn't (strictly).

/W
Nov 7 '07 #4

This thread has been closed and replies have been disabled. Please start a new discussion.

### Similar topics

 23 by: Fuzzyman | last post by: Pythons internal 'pointers' system is certainly causing me a few headaches..... When I want to copy the contents of a variable I find it impossible to know whether I've copied the contents *or*... 9 by: Yomanium Yoth Taripoät II | last post by: HI, 1) what are the differences between list and tuple? 2) how to concatenate tuple and list? no method, no opérator? 3) im looking the fucking manual, and cant add value in my tuple, when it... 4 by: GrelEns | last post by: hello, i wonder if this possible to subclass a list or a tuple and add more attributes ? also does someone have a link to how well define is own iterable object ? what i was expecting was... 2 by: Ishwar Rattan | last post by: I am a little confused about a list and a tuple. Both can have dissimilar data-type elements, can be returned by functions. The only difference that I see is that list is mutable and tuple is... 16 by: flyaflya | last post by: a = "(1,2,3)" I want convert a to tuple:(1,2,3),but tuple(a) return ('(', '1', ',', '2', ',', '3', ')') not (1,2,3) 5 by: Xah Lee | last post by: suppose i'm going to have a data structure like this: , , , , .... ] should i use (width,height) or ? 6 by: fdu.xiaojf | last post by: Hi all, I can use list comprehension to create list quickly. So I expected that I can created tuple quickly with the same syntax. But I found that the same syntax will get a generator, not a... 25 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... 0 by: Hatem Nassrat | last post by: on Wed Jun 13 10:17:24 CEST 2007, Diez B. Roggisch deets at nospam.web.de wrote: Well I have looked into this and it seems that using the list comprehension is faster, which is... 1 by: isladogs | last post by: The next online meeting of the Access Europe User Group will be on Wednesday 6 Dec 2023 starting at 18:00 UK time (6PM UTC) and finishing at about 19:15 (7.15PM). In this month's session, Mike... 0 by: VivesProcSPL | last post by: Obviously, one of the original purposes of SQL is to make data query processing easy. The language uses many English-like terms and syntax in an effort to make it easy to learn, particularly for... 0 by: jianzs | last post by: Introduction Cloud-native applications are conventionally identified as those designed and nurtured on cloud infrastructure. Such applications, rooted in cloud technologies, skillfully benefit from... 0 by: abbasky | last post by: ### Vandf component communication method one: data sharing ​ Vandf components can achieve data exchange through data sharing, state sharing, events, and other methods. Vandf's data exchange method... 0 by: fareedcanada | last post by: Hello I am trying to split number on their count. suppose i have 121314151617 (12cnt) then number should be split like 12,13,14,15,16,17 and if 11314151617 (11cnt) then should be split like... 0 by: stefan129 | last post by: Hey forum members, I'm exploring options for SSL certificates for multiple domains. Has anyone had experience with multi-domain SSL certificates? Any recommendations on reliable providers or specific... 0 by: egorbl4 | last post by: Скачал я git, хотел начать настройку, а там вылезло вот это Что это? Что мне с этим делать? ... 1 by: davi5007 | last post by: Hi, Basically, I am trying to automate a field named TraceabilityNo into a web page from an access form. I've got the serial held in the variable strSearchString. How can I get this into the... 0 by: MeoLessi9 | last post by: I have VirtualBox installed on Windows 11 and now I would like to install Kali on a virtual machine. However, on the official website, I see two options: "Installer images" and "Virtual machines"....