Re: Is '[' a function or an operator or an language feature?
On 07/17/2010 04:59 AM, pyt...@bdurham.com wrote: Tim, 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, eat a crust of stale bread, go to work down in machine language, fourteen hours a day, week-in week-out, for sixpence a week, and when we got home our Dad would thrash us to sleep wi' his belt... Luxury. Our computers only had 256 bytes[1] of RAM and We had to enter our code, in the dark, using loose binary toggle switches with poor connections. We used to have to get out of the lake at three o'clock in the morning, clean the lake, eat a handful of hot gravel, go to work at the mill every day for tuppence a month, come home, and Dad would beat us around the head and neck with a broken bottle, if we were LUCKY! [1] http://incolor.inebraska.com/bill_r/elf/html/elf-1-33.htm In slightly related news, I just stumbled upon this: http://catb.org/esr/jargon/html/story-of-mel.html Now of course, he had it tough. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
Thomas, In slightly related news, I just stumbled upon this: http://catb.org/esr/jargon/html/story-of-mel.html Now of course, he had it tough. Tough??? Well we had it tough. Our computers[1][2] had 0 bytes of RAM and 0 bytes of ROM. We had to hand wire our logic and physically push data through logic gates without the benefit of transistors. We used to have to get up out of the shoebox at twelve o'clock at night, and LICK the road clean with our tongues. We had half a handful of freezing cold gravel, worked twenty-four hours a day at the mill for fourpence every six years, and when we got home, our Dad would slice us in two with a bread knife. Malcolm [1] http://totallytrygve.com/computer.php?item=188picture=0 [2] I learned about computers through one of these kits. When I first stumbled across assembly language (6502), my first thought was, wow, this is so much easier than what I've been doing! snipped 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, eat a crust of stale bread, go to work down in machine language, fourteen hours a day, week-in week-out, for sixpence a week, and when we got home our Dad would thrash us to sleep wi' his belt... Luxury. Our computers only had 256 bytes[1] of RAM and We had to enter our code, in the dark, using loose binary toggle switches with poor connections. We used to have to get out of the lake at three o'clock in the morning, clean the lake, eat a handful of hot gravel, go to work at the mill every day for tuppence a month, come home, and Dad would beat us around the head and neck with a broken bottle, if we were LUCKY! [1] http://incolor.inebraska.com/bill_r/elf/html/elf-1-33.htm In slightly related news, I just stumbled upon this: http://catb.org/esr/jargon/html/story-of-mel.html Now of course, he had it tough. /snipped -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On Fri, 16 Jul 2010 21:23:09 -0500, Tim Chase wrote: Is anyone /still/ using Python 2.x? ;-) 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, You got to use ed? Oh, we *dreamed* of using an editor! We had to edit the sectors on disk directly with a magnetised needle. A rusty, blunt needle. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On Sat, Jul 17, 2010 at 1:03 AM, Steven D'Aprano st...@remove-this-cybersource.com.au wrote: On Fri, 16 Jul 2010 21:23:09 -0500, Tim Chase wrote: Is anyone /still/ using Python 2.x? ;-) 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, You got to use ed? Oh, we *dreamed* of using an editor! We had to edit the sectors on disk directly with a magnetised needle. A rusty, blunt needle. Real programmers use butterflies. http://xkcd.com/378/ Geremy Condra -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 17/07/2010 03:59, pyt...@bdurham.com wrote: Tim, 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, eat a crust of stale bread, go to work down in machine language, fourteen hours a day, week-in week-out, for sixpence a week, and when we got home our Dad would thrash us to sleep wi' his belt... Luxury. Our computers only had 256 bytes[1] of RAM and We had to enter our code, in the dark, using loose binary toggle switches with poor connections. We used to have to get out of the lake at three o'clock in the morning, clean the lake, eat a handful of hot gravel, go to work at the mill every day for tuppence a month, come home, and Dad would beat us around the head and neck with a broken bottle, if we were LUCKY! Cheers, Malcolm [1] http://incolor.inebraska.com/bill_r/elf/html/elf-1-33.htm I'm just envisaging a Paper Tape Repairman sketch. Kindest regards. Mark Lawrence. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 07/17/2010 10:03 AM, Steven D'Aprano wrote: On Fri, 16 Jul 2010 21:23:09 -0500, Tim Chase wrote: Is anyone /still/ using Python 2.x? ;-) 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, You got to use ed? Oh, we *dreamed* of using an editor! We had to edit the sectors on disk directly with a magnetised needle. A rusty, blunt needle. You try and tell the young people of today that, and they won't believe you. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On Jul 16, 12:01 pm, Peng Yu pengyu...@gmail.com wrote:
I mean to get the man page for '[' like in the following code.
x=[1,2,3]
But help('[') doesn't seem to give the above usage.
###
Mutable Sequence Types
**
List objects support additional operations that allow in-place
modification of the object. Other mutable sequence types (when added
to the language) should also support these operations. Strings and
tuples are immutable sequence types: such objects cannot be modified
once created. The following operations are defined on mutable sequence
types (where *x* is an arbitrary object):
...
##
I then checked help('LISTLITERALS'), which gives some description that
is available from the language reference. So '[' in x=[1,2,3] is
considered as a language feature rather than a function or an
operator?
List displays
*
A list display is a possibly empty series of expressions enclosed in
square brackets:
list_display ::= [ [expression_list | list_comprehension] ]
list_comprehension ::= expression list_for
list_for ::= for target_list in old_expression_list
[list_iter]
old_expression_list ::= old_expression [(, old_expression)+ [,]]
list_iter ::= list_for | list_if
list_if ::= if old_expression [list_iter]
.
###
--
Regards,
Peng
Also look for __getitem__ and __setitem__, these methods defined on
your own container classes will allow you to write myobject['x'] and
have your own custom lookup code get run.
-- Paul
--
http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 07/17/2010 01:03 AM, Steven D'Aprano wrote: On Fri, 16 Jul 2010 21:23:09 -0500, Tim Chase wrote: Is anyone /still/ using Python 2.x? ;-) 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, You got to use ed? Oh, we *dreamed* of using an editor! We had to edit the sectors on disk directly with a magnetised needle. A rusty, blunt needle. Along those lines, there's this -- one of my favorite comics: http://xkcd.com/378/ and unrelated to the thread but still about python: http://xkcd.com/353/ Gary Herron -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 07/17/2010 06:38 PM, Gary Herron wrote: On 07/17/2010 01:03 AM, Steven D'Aprano wrote: On Fri, 16 Jul 2010 21:23:09 -0500, Tim Chase wrote: Is anyone /still/ using Python 2.x? ;-) http://xkcd.com/353/ There we have the most important difference between Python 2 and 3: in the latter, import antigravity actually works. -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 7/17/2010 9:38 AM Gary Herron said... and unrelated to the thread but still about python: http://xkcd.com/353/ ActivePython 2.6.1.1 (ActiveState Software Inc.) based on Python 2.6.1 (r261:67515, Dec 5 2008, 13:58:38) [MSC v.1500 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import antigravity Nothing happens. Emile -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 7/16/2010 7:08 PM MRAB said... Peng Yu wrote: On Fri, Jul 16, 2010 at 5:42 PM, Terry Reedy tjre...@udel.edu wrote: On 7/16/2010 1:01 PM, Peng Yu wrote: I mean to get the man page for '[' like in the following code. x=[1,2,3] You might find my Python symbol glossary useful. https://code.google.com/p/xploro/downloads/detail?name=PySymbols.html This is for Python 3. Is there one for Python 2.x? Is anyone /still/ using Python 2.x? ;-) Is anyone /actually/ using Python 3.x ;-) Emile -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On Sat, Jul 17, 2010 at 10:27 AM, Emile van Sebille em...@fenx.com wrote: On 7/17/2010 9:38 AM Gary Herron said... and unrelated to the thread but still about python: http://xkcd.com/353/ ActivePython 2.6.1.1 (ActiveState Software Inc.) based on Python 2.6.1 (r261:67515, Dec 5 2008, 13:58:38) [MSC v.1500 32 bit (Intel)] on win32 Type help, copyright, credits or license for more information. import antigravity Nothing happens. Emile Try it in Python 3. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 7/17/2010 10:57 AM Benjamin Kaplan said... Try it in Python 3. Cool. :) Although I wouldn't have been surprised had my monitor levitated. :) Emile -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 7/16/10 12:01 PM, Peng Yu wrote:
I then checked help('LISTLITERALS'), which gives some description that
is available from the language reference. So '[' in x=[1,2,3] is
considered as a language feature rather than a function or an
operator?
Yes. It is part of the list literal syntax of the Python language.
--
Robert Kern
I have come to believe that the whole world is an enigma, a harmless enigma
that is made terrible by our own mad attempt to interpret it as though it had
an underlying truth.
-- Umberto Eco
--
http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 7/16/2010 1:01 PM, Peng Yu wrote: I mean to get the man page for '[' like in the following code. x=[1,2,3] You might find my Python symbol glossary useful. https://code.google.com/p/xploro/downloads/detail?name=PySymbols.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On Fri, Jul 16, 2010 at 5:42 PM, Terry Reedy tjre...@udel.edu wrote: On 7/16/2010 1:01 PM, Peng Yu wrote: I mean to get the man page for '[' like in the following code. x=[1,2,3] You might find my Python symbol glossary useful. https://code.google.com/p/xploro/downloads/detail?name=PySymbols.html This is for Python 3. Is there one for Python 2.x? -- Regards, Peng -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
Peng Yu wrote: On Fri, Jul 16, 2010 at 5:42 PM, Terry Reedy tjre...@udel.edu wrote: On 7/16/2010 1:01 PM, Peng Yu wrote: I mean to get the man page for '[' like in the following code. x=[1,2,3] You might find my Python symbol glossary useful. https://code.google.com/p/xploro/downloads/detail?name=PySymbols.html This is for Python 3. Is there one for Python 2.x? Is anyone /still/ using Python 2.x? ;-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 07/16/2010 09:08 PM, MRAB wrote: Peng Yu wrote: You might find my Python symbol glossary useful. https://code.google.com/p/xploro/downloads/detail?name=PySymbols.html This is for Python 3. Is there one for Python 2.x? Is anyone /still/ using Python 2.x? ;-) 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, eat a crust of stale bread, go to work down in machine language, fourteen hours a day, week-in week-out, for sixpence a week, and when we got home our Dad would thrash us to sleep wi' his belt... -tkc -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
Tim, 2.x?! You were lucky. We lived for three months with Python 1.x in a septic tank. We used to have to get up at six in the morning, write our 1.x code using ed, eat a crust of stale bread, go to work down in machine language, fourteen hours a day, week-in week-out, for sixpence a week, and when we got home our Dad would thrash us to sleep wi' his belt... Luxury. Our computers only had 256 bytes[1] of RAM and We had to enter our code, in the dark, using loose binary toggle switches with poor connections. We used to have to get out of the lake at three o'clock in the morning, clean the lake, eat a handful of hot gravel, go to work at the mill every day for tuppence a month, come home, and Dad would beat us around the head and neck with a broken bottle, if we were LUCKY! Cheers, Malcolm [1] http://incolor.inebraska.com/bill_r/elf/html/elf-1-33.htm -- http://mail.python.org/mailman/listinfo/python-list
Re: Is '[' a function or an operator or an language feature?
On 7/16/2010 9:42 PM, Peng Yu wrote: On Fri, Jul 16, 2010 at 5:42 PM, Terry Reedytjre...@udel.edu wrote: On 7/16/2010 1:01 PM, Peng Yu wrote: I mean to get the man page for '[' like in the following code. x=[1,2,3] You might find my Python symbol glossary useful. https://code.google.com/p/xploro/downloads/detail?name=PySymbols.html This is for Python 3. Is there one for Python 2.x? They are close to 100% the same. I intentionally worded the entries so one could look in the manuals for details. -- Terry Jan Reedy -- http://mail.python.org/mailman/listinfo/python-list
