Case Solution: Doing Business in Sierra Leone Graeme Hossie at London Mining (A) by Brian C. Pinkham, Ken Mark
1. What priorities should Hossie consider? 2. What are some of the concerns around enforcement of the contracts? 3. How should Hossie carry out negotiations? -- https://mail.python.org/mailman/listinfo/python-list
Re: An endless loop
On 15/10/2017 03:10, Stefan Ram wrote: I made an error I made a thousand times before. I had programmed an endless loop. But never did I see before so clear why it's called an endless loop. (Tested in IDLE.) from turtle import * reset(); reset(); shape( 'turtle' ); showturtle() def poly( n, length ): i = 0 while i < n: forward( length ) left( 360/n ) poly( 5, 100 ) done() I assume you're talking about the while-loop (because on my machine, it hangs just using 'from turtle...' or 'import turtle'). That looks to be a repeat-N-times loop. There isn't a dedicated statement for that, the closest Python feature would be 'for i in range(n)' with i a dummy loop variable. -- bartc -- https://mail.python.org/mailman/listinfo/python-list
Re: An endless loop
On 2017-10-15 10:15, bartc wrote: > On 15/10/2017 03:10, Stefan Ram wrote: >>I made an error I made a thousand times before. >> >>I had programmed an endless loop. >> >>But never did I see before so clear why it's called >>an endless loop. (Tested in IDLE.) >> >> from turtle import * >> >> reset(); reset(); shape( 'turtle' ); showturtle() >> >> def poly( n, length ): >> i = 0 >> while i < n: >> forward( length ) >> left( 360/n ) >> >> poly( 5, 100 ) >> done() > > I assume you're talking about the while-loop (because on my machine, it > hangs just using 'from turtle...' or 'import turtle'). No graphics? For those of you who can't use turtle graphics and aren't familiar enough with it to see what it does without running the program: It displays a turtle running through the same (pentagon-shaped) loop over and over again. Yes, that's a very nice visualization of an endless loop. hp -- _ | Peter J. Holzer| Fluch der elektronischen Textverarbeitung: |_|_) || Man feilt solange an seinen Text um, bis | | | h...@hjp.at | die Satzbestandteile des Satzes nicht mehr __/ | http://www.hjp.at/ | zusammenpaßt. -- Ralph Babel -- https://mail.python.org/mailman/listinfo/python-list
what is credit in data mining?
Hello, Anyone useful idea or material on: credit in data mining? -- https://mail.python.org/mailman/listinfo/python-list
Re: An endless loop
On Sun, Oct 15, 2017 at 9:15 PM, bartc wrote: > On 15/10/2017 03:10, Stefan Ram wrote: >> >>I made an error I made a thousand times before. >> >>I had programmed an endless loop. >> >>But never did I see before so clear why it's called >>an endless loop. (Tested in IDLE.) >> >> from turtle import * >> >> reset(); reset(); shape( 'turtle' ); showturtle() >> >> def poly( n, length ): >> i = 0 >> while i < n: >> forward( length ) >> left( 360/n ) >> >> poly( 5, 100 ) >> done() > > > I assume you're talking about the while-loop (because on my machine, it > hangs just using 'from turtle...' or 'import turtle'). > > That looks to be a repeat-N-times loop. There isn't a dedicated statement > for that, the closest Python feature would be 'for i in range(n)' with i a > dummy loop variable. You can use that or "for _ in range(n)" as a pretty effective form of that loop. I've never had a problem with it. Python doesn't need another type of loop. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: An endless loop
On 15/10/2017 12:20, Chris Angelico wrote: On Sun, Oct 15, 2017 at 9:15 PM, bartc wrote: I assume you're talking about the while-loop (because on my machine, it hangs just using 'from turtle...' or 'import turtle'). (Machine was screwed up I think, as I had to restart it shortly after for other reasons. When the turtle graphics worked.) That looks to be a repeat-N-times loop. There isn't a dedicated statement for that, the closest Python feature would be 'for i in range(n)' with i a dummy loop variable. You can use that or "for _ in range(n)" as a pretty effective form of that loop. I've never had a problem with it. Python doesn't need another type of loop. I could understand that sentiment if there were already dozens. But I believe there's only, what, two loop types? To implement a number of basic looping requirements which, if not that numerous, are somewhat more than two. Not exactly taxing the grey matter which already has those extra loop types in mind, and has to find a way to express them in terms of only two. -- bartc -- https://mail.python.org/mailman/listinfo/python-list
Re: An endless loop
On 10/15/17 9:59 AM, bartc wrote: On 15/10/2017 12:20, Chris Angelico wrote: On Sun, Oct 15, 2017 at 9:15 PM, bartc wrote: I assume you're talking about the while-loop (because on my machine, it hangs just using 'from turtle...' or 'import turtle'). (Machine was screwed up I think, as I had to restart it shortly after for other reasons. When the turtle graphics worked.) That looks to be a repeat-N-times loop. There isn't a dedicated statement for that, the closest Python feature would be 'for i in range(n)' with i a dummy loop variable. You can use that or "for _ in range(n)" as a pretty effective form of that loop. I've never had a problem with it. Python doesn't need another type of loop. I could understand that sentiment if there were already dozens. But I believe there's only, what, two loop types? To implement a number of basic looping requirements which, if not that numerous, are somewhat more than two. Not exactly taxing the grey matter which already has those extra loop types in mind, and has to find a way to express them in terms of only two. We've covered this before. A challenge for the group: let's not create yet another 100-reply thread rehashing the design of Python looping... Please? :) --Ned. -- https://mail.python.org/mailman/listinfo/python-list
Re: An endless loop
On Mon, 16 Oct 2017 01:38 am, Ned Batchelder wrote: > We've covered this before. A challenge for the group: let's not create > yet another 100-reply thread rehashing the design of Python looping... > Please? :) Certainly! So... who thinks that Python should implement tail recursion optimization so that we can forgo iteration altogether? *wicked grin* -- Steve “Cheer up,” they said, “things could be worse.” So I cheered up, and sure enough, things got worse. -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 2 -> 3, urllib.urlopen (corrected the case)
> On Oct 14, 2017, at 6:46 PM, Ben Bacarisse wrote:
>
> Irv Kalb writes:
>
>> Thank you!
>
> You're welcome.
>
>
>>> Just a data point... It works here:
>>>
>>> $ python3 t.py
>>> Response is: b'156.99\n'
>>> $ cat t.py
>>> import urllib.request
>>> fullURLWithParameters = 'http://finance.yahoo.com/d/quotes.csv?s=aapl&f=l1'
>>> # read all the data
>>> response = urllib.request.urlopen(fullURLWithParameters).read()
>>>
>>> print('Response is: ', response)
>>> $ python3 --version
>>> Python 3.5.2
>>
>> I have not tried this on anything but my Mac. I'm running 3.6.1
>
>>> For example, here:
>>>
>>> $ wget -q -O - 'http://finance.yahoo.com/d/quotes.csv?s=aapl&f=l1'
>>> 156.99
>>>
>>> Finally, wget -S shows that the resource has moved. It is now at
>>>
>>> Location: http://download.finance.yahoo.com/d/quotes.csv?s=aapl&f=l1
>>>
>>> I don't think this has anything to do with your problem, but it's worth
>>> noting.
>>
>> That DID fix it. I changed the URL to add 'download/' and it worked
>> perfectly.
>
> That's... interesting.
>
>> Apparently, Python 3 differs from Python 2 in the way that it is
>> handling a missing/forwarding URL, because the original code in Python
>> 2.7 works perfectly.
>
> Python 3 works for me. I still suspect it's some system difference
> rather than being, say, a 3.6.1 vs 3.5.2 difference. What happens if
> you change the URL to use https rather than http?
>
> --
> Ben.
> --
> https://mail.python.org/mailman/listinfo/python-list
>
Trying https (with and without the "download." part) results in the same
traceback as I was seeing earlier.
Thanks again,
Irv
--
https://mail.python.org/mailman/listinfo/python-list
Re: Python 2 -> 3, urllib.urlopen (corrected the case)
Irv Kalb writes: >> On Oct 14, 2017, at 6:46 PM, Ben Bacarisse wrote: Finally, wget -S shows that the resource has moved. It is now at Location: http://download.finance.yahoo.com/d/quotes.csv?s=aapl&f=l1 I don't think this has anything to do with your problem, but it's worth noting. >>> >>> That DID fix it. I changed the URL to add 'download/' and it worked >>> perfectly. >> >> That's... interesting. >> >>> Apparently, Python 3 differs from Python 2 in the way that it is >>> handling a missing/forwarding URL, because the original code in Python >>> 2.7 works perfectly. >> >> Python 3 works for me. I still suspect it's some system difference >> rather than being, say, a 3.6.1 vs 3.5.2 difference. What happens if >> you change the URL to use https rather than http? >> > > Trying https (with and without the "download." part) results in the > same traceback as I was seeing earlier. It looks like there may be something amiss with your local certificates, at least as far as Python's SSL code in concerned. That's a Dark Art to me so I can't really help (and it might be Mac specific). The error might have showed up in the first test because the redirection was to an https: URL. -- Ben. -- https://mail.python.org/mailman/listinfo/python-list
how to read in the newsreader
Gents, how do i get this group in a newsreader? The digest i'm getting is not workable for me - i can't reply , can only read the replies from the members of the group. Or. maybe, it shouldn't be a news reader please advise.. P.S. Oh the comp.lang.python is a nightmare because of spam... -- https://mail.python.org/mailman/listinfo/python-list
Re: how to read in the newsreader
On 10/15/2017 08:50 PM, Andrew Z wrote: > Gents, > how do i get this group in a newsreader? The digest i'm getting is not > workable for me - i can't reply , can only read the replies from the > members of the group. Or. maybe, it shouldn't be a news reader > please advise.. > > P.S. Oh the comp.lang.python is a nightmare because of spam... Regardless of what usenet reader you use, com.lang.python will have the same spam everywhere. So maybe reading via usenet isn't that useful anyway. I just subscribe to the mailing list and then have a rule in my email filter to stick all list messages in their own folder (or gmail label). I'm using gmail, so I just use gmail's filtering settings. Then I view email using IMAP and a conventional email reader that supports real threading of messages. Works great. A lot of spam is filtered out this way, also. In fact very little spam gets through to my folder between python.org's filtering and gmail's spam detection. I'm subscribed to maybe a dozen email lists, and I filter all of them into their own folders. -- https://mail.python.org/mailman/listinfo/python-list
Re: how to read in the newsreader
Michael, that's what i use too - gmail. But i get the digest only and can't really reply that way. i was hoping to get the mail.python.org list On Mon, Oct 16, 2017 at 12:00 AM, Michael Torrie wrote: > On 10/15/2017 08:50 PM, Andrew Z wrote: > > Gents, > > how do i get this group in a newsreader? The digest i'm getting is not > > workable for me - i can't reply , can only read the replies from the > > members of the group. Or. maybe, it shouldn't be a news reader > > please advise.. > > > > P.S. Oh the comp.lang.python is a nightmare because of spam... > > Regardless of what usenet reader you use, com.lang.python will have the > same spam everywhere. So maybe reading via usenet isn't that useful > anyway. > > I just subscribe to the mailing list and then have a rule in my email > filter to stick all list messages in their own folder (or gmail label). > I'm using gmail, so I just use gmail's filtering settings. Then I view > email using IMAP and a conventional email reader that supports real > threading of messages. Works great. A lot of spam is filtered out this > way, also. In fact very little spam gets through to my folder between > python.org's filtering and gmail's spam detection. > > I'm subscribed to maybe a dozen email lists, and I filter all of them > into their own folders. > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
Re: how to read in the newsreader
On Mon, Oct 16, 2017 at 3:19 PM, Andrew Z wrote: > Michael, that's what i use too - gmail. But i get the digest only and can't > really reply that way. i was hoping to get the mail.python.org list Turn off digests then. Easy! ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: how to read in the newsreader
i'm typing without thinking. Sorry. Let me try again. I subscribed to python-list@python.org. That has 0 spam ( as far as i can see), but i can only get a digest. They do say the list and comp.python group are bidirectional, but - at comp - tons of spam, there - none. The google groups doesn't seemed to filter anything in the comp group. But what you recommend is to access the group using regular email client and use it's spam filtering . Did i get that right ? On Mon, Oct 16, 2017 at 12:19 AM, Andrew Z wrote: > Michael, that's what i use too - gmail. But i get the digest only and > can't really reply that way. i was hoping to get the mail.python.org > list > > On Mon, Oct 16, 2017 at 12:00 AM, Michael Torrie > wrote: > >> On 10/15/2017 08:50 PM, Andrew Z wrote: >> > Gents, >> > how do i get this group in a newsreader? The digest i'm getting is not >> > workable for me - i can't reply , can only read the replies from the >> > members of the group. Or. maybe, it shouldn't be a news reader >> > please advise.. >> > >> > P.S. Oh the comp.lang.python is a nightmare because of spam... >> >> Regardless of what usenet reader you use, com.lang.python will have the >> same spam everywhere. So maybe reading via usenet isn't that useful >> anyway. >> >> I just subscribe to the mailing list and then have a rule in my email >> filter to stick all list messages in their own folder (or gmail label). >> I'm using gmail, so I just use gmail's filtering settings. Then I view >> email using IMAP and a conventional email reader that supports real >> threading of messages. Works great. A lot of spam is filtered out this >> way, also. In fact very little spam gets through to my folder between >> python.org's filtering and gmail's spam detection. >> >> I'm subscribed to maybe a dozen email lists, and I filter all of them >> into their own folders. >> -- >> https://mail.python.org/mailman/listinfo/python-list >> > > -- https://mail.python.org/mailman/listinfo/python-list
Re: how to read in the newsreader
hmm. i did do that. maybe just a delay. I'll see how it will go tomorrow then. Thank you gents. On Mon, Oct 16, 2017 at 12:30 AM, Chris Angelico wrote: > On Mon, Oct 16, 2017 at 3:19 PM, Andrew Z wrote: > > Michael, that's what i use too - gmail. But i get the digest only and > can't > > really reply that way. i was hoping to get the mail.python.org list > > Turn off digests then. Easy! > > ChrisA > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
Case Solution: Detroit Bikes Becoming the Biggest Bicycle Manufacturer in North America by Kent Walker, Neda Demiri
hello can i get solution -- https://mail.python.org/mailman/listinfo/python-list
Re: Return str to a callback raise a segfault if used in string formating
Vincent Vande Vyvre writes: > Le 14/10/17 à 15:59, Stefan Behnel a écrit : > ... > Thanks, I know Cython but the code is already in C. > > This is a lib released as a frontend. Then usable only in command line. This does not prevent the use of "Cython". In fact, one of its use cases is the creation of bindings - a thin wrapper around a C library to make it easily usable from Python. An example is "lxml", a binding for the C library "libxml2". Another one is "dm.xmlsec.binding", a binding for the C library "libxmlsec". -- https://mail.python.org/mailman/listinfo/python-list
Re: how to read in the newsreader
Andrew Z writes: > hmm. i did do that. maybe just a delay. > I'll see how it will go tomorrow then. Thank you gents. > > On Mon, Oct 16, 2017 at 12:30 AM, Chris Angelico wrote: > >> On Mon, Oct 16, 2017 at 3:19 PM, Andrew Z wrote: >> > Michael, that's what i use too - gmail. But i get the digest only >> > and can't really reply that way. i was hoping to get the >> > mail.python.org list >> >> Turn off digests then. Easy! If you do stick with a digest then check your newsreader for a feature to expand it. Then you can read and reply as if you were getting individual posts. -- Pete Forman -- https://mail.python.org/mailman/listinfo/python-list
