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Make Python create a tuple with one element in a clean way #47066

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chester mannequin opened this issue May 11, 2008 · 5 comments
Closed

Make Python create a tuple with one element in a clean way #47066

chester mannequin opened this issue May 11, 2008 · 5 comments
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type-feature A feature request or enhancement

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@chester
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Mannequin

chester mannequin commented May 11, 2008

BPO 2817
Nosy @loewis, @birkenfeld, @benjaminp

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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GitHub fields:

assignee = None
closed_at = <Date 2008-05-11.14:18:41.237>
created_at = <Date 2008-05-11.13:16:15.957>
labels = ['type-feature']
title = 'Make Python create a tuple with one element in a clean way'
updated_at = <Date 2008-05-11.18:51:24.264>
user = 'https://bugs.python.org/chester'

bugs.python.org fields:

activity = <Date 2008-05-11.18:51:24.264>
actor = 'chester'
assignee = 'none'
closed = True
closed_date = <Date 2008-05-11.14:18:41.237>
closer = 'georg.brandl'
components = []
creation = <Date 2008-05-11.13:16:15.957>
creator = 'chester'
dependencies = []
files = []
hgrepos = []
issue_num = 2817
keywords = []
message_count = 5.0
messages = ['66626', '66627', '66634', '66645', '66650']
nosy_count = 4.0
nosy_names = ['loewis', 'georg.brandl', 'benjamin.peterson', 'chester']
pr_nums = []
priority = 'normal'
resolution = 'rejected'
stage = None
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue2817'
versions = ['Python 2.6', 'Python 2.5', 'Python 2.4', 'Python 2.3', 'Python 2.2.3', 'Python 2.2.2', 'Python 2.2.1', 'Python 2.2', 'Python 2.1.2', 'Python 2.1.1', '3rd party', 'Python 3.0']
@chester
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Mannequin Author

chester mannequin commented May 11, 2008

To create a tuple with one element, you need to do this:

>>> my_tuple = (1,)    # Note the trailing comma after the value 1
>>> type(my_tuple)
<type 'tuple'>

But if you do this

>>> my_tuple = (1)
>>> type(my_tuple)
<type 'int'>

you don't get a tuple. I thought that just putting a value inside ( )
would make a tuple. Apparently that is not the case. I hate ugly code
so it would be clean if Python would convert anything put into ( ) to
be a tuple, even if just one value was put in (without having to use
that ugly looking comma with no value after it).

@chester chester mannequin added the type-feature A feature request or enhancement label May 11, 2008
@benjaminp
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But we need parentheses for grouping!

@birkenfeld
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That's an absolute no-starter. Not the parentheses make the tuple, the
commas do. The empty tuple is the exception, not the rule.

@loewis
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Mannequin

loewis mannequin commented May 11, 2008

Just in case the previous comments aren't clear: Would you rather see

py> (3+4)*5
35

or

py> (3+4)*5
(7, 7, 7, 7, 7)

@chester
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chester mannequin commented May 11, 2008

Martin I see the point now. I appologize for not having the clear head
of seeing the possible damage that my feature request would make. I take
my request back.

@ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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