Re: Bringing Order to programming
r...@zedat.fu-berlin.de (Stefan Ram) writes: > source = \ > 'Python is an easy to learn, powerful programming language. It has' + \ > ' efficient high-level data structures and a simple but effective' + \ > ' approach to object-oriented programming. Python's elegant syntax' + \ You have an unexscped ' in there. > ' and dynamic typing, together with its interpreted nature, make it' + \ > ' an ideal language for scripting and rapid application development' + \ > ' in many areas on most platforms. '; > transcript > > a 0.0680 s, a 1.2040 s, a 9.5823 s, a 81.9688 s, My times are very nearly linear: a 0.0280 s, a 0.2931 s, a 2.9006 s, a 29.4318 s, -- Ben. -- https://mail.python.org/mailman/listinfo/python-list
Re: Bringing Order to programming
On Fri, Feb 1, 2019 at 2:00 PM MRAB wrote: > > On 2019-02-01 00:28, Avi Gross wrote: > > The second variant is to use the newer bytearray data structure very > > carefully as it is to a first approximation a mutable string. Adding to the > > end of a new one should be quick. WARNING: I said be careful. A bytearray is > > more like a list of 8-bit ints. With care you can handle ASCII text. > > > If you're replacing anything within the ASCII range, it'll also work for > UTF-8! It'll work if you represent the string as UTF-8 bytes, yes. Perhaps it would be better to represent a string as a sequence of 21-bit integers instead of 8-bit integers? ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Bringing Order to programming
On 2019-02-01 00:28, Avi Gross wrote: The discussion moved on to debating if an algorithm is O(N) or O(N**2). For small amounts of text, on fast machines, it really is not worth worrying about the cost of appending to the end of a growing string resulting in multiple copies and lots of garbage collection. Many computer textbooks love to tell you that nothing should be modifiable as a paradigm and endless copying is good for you since you never change existing data so fewer mistakes ... But, for any programmers that happily want to read in entire books and for some reason then replace all spaces with newlines, may I suggest the following. Convert your "text" to/from a list of individual characters. Copy the non-space characters to the end of an empty list and append a newline when you see a space. This part should be O(N) as lists have a fast way to append in constant time. At the end, use str(listname) to do what is needed to get back a string. Also O(N). I won't supply the code for obvious reasons but it looks like: final_list = [] for character in initial_text: # Add carefully to the end of final_list final_text = str(final_list) The second variant is to use the newer bytearray data structure very carefully as it is to a first approximation a mutable string. Adding to the end of a new one should be quick. WARNING: I said be careful. A bytearray is more like a list of 8-bit ints. With care you can handle ASCII text. If you're replacing anything within the ASCII range, it'll also work for UTF-8! -- https://mail.python.org/mailman/listinfo/python-list
Bringing Order to programming
The discussion moved on to debating if an algorithm is O(N) or O(N**2). For small amounts of text, on fast machines, it really is not worth worrying about the cost of appending to the end of a growing string resulting in multiple copies and lots of garbage collection. Many computer textbooks love to tell you that nothing should be modifiable as a paradigm and endless copying is good for you since you never change existing data so fewer mistakes ... But, for any programmers that happily want to read in entire books and for some reason then replace all spaces with newlines, may I suggest the following. Convert your "text" to/from a list of individual characters. Copy the non-space characters to the end of an empty list and append a newline when you see a space. This part should be O(N) as lists have a fast way to append in constant time. At the end, use str(listname) to do what is needed to get back a string. Also O(N). I won't supply the code for obvious reasons but it looks like: final_list = [] for character in initial_text: # Add carefully to the end of final_list final_text = str(final_list) The second variant is to use the newer bytearray data structure very carefully as it is to a first approximation a mutable string. Adding to the end of a new one should be quick. WARNING: I said be careful. A bytearray is more like a list of 8-bit ints. With care you can handle ASCII text. -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
On 1/31/2019 3:31 PM, Chupo via Python-list wrote: In article , Chris Angelico says... There are stupid questions, but I enjoy answering those too. You don't need to apologize for asking these questions. All you need to do is ignore the trolls like Rick. In fact, if you abandon Google Groups and instead read the mailing list python-list@python.org, you can just leave behind all the people who've been blocked. Thank you for the tip. I am in fact not using Google Groups but am accessing comp.lang.python via nntp:// by using a newsreader. Then point your newsreader, as I have, to news.gmane.org and subscribe to gmane.comp.python.general, which mirrors python-list. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On 1/31/2019 1:36 PM, Grant Edwards wrote: On 2019-01-31, Grant Edwards wrote: On 2019-01-31, Terry Reedy wrote: On 1/31/2019 11:19 AM, Ian Clark wrote: text = "The best day of my life!" output = '' for i in text: if i == ' ': output +='\n' else: output += i print(output) But this is an awful, O(n*n) way to solve an inherently O(n) problem, How is it O(n^2)? It loops through the input sequence exactly once. That looks like O(n) to me. Doh! The 'output +=' operation is also O(n), and it's executed n times. It is like bubble sort doing n x O(n) operations. This does not mean that O(n*n) is always bad as it may beat O(n*logn) or even O(n) in terms of real time when the neglected multiplier and other terms are considered*. I regularly write use + to catenate a few, fixed number of terms. But I just read a blogger who used += in a loop like the above where there could also be 1000s or more strings to be added together. * timsort (Tim Peters), used for list.sort and other language sorts, uses 'O(n*n)' binary insert sort for 'short' subarrays. Tim empirically selected 64 as the boundary between 'short' and 'long' for Python. On modern CPUs, the O(n*n), shifting part of an array, is done (relatively fast) with a single machine instruction. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
On 1/02/19 9:00 AM, Chris Angelico wrote: On Fri, Feb 1, 2019 at 6:56 AM Chupo via Python-list wrote: In article <67d5c4bc-7212-43d0-b44f-7f22efffa...@googlegroups.com>, Rick Johnson says... I was thought there aren't stupid questions, just stupid answers and I for sure won't apologize for asking any question. If someone things the question I asked is stupid they can ignore it. I am not affraid of losing my reputation by asking a question. There are stupid questions, but I enjoy answering those too. You don't ... (TLDR?: the are "stupid questions", here's why, and some ideas with which to frame/consider responses) Many years ago, gulp, decades ago; when I first started-out in vocational training, I also thought 'there are no stupid questions, only stupid answers'. Possibly I was?am idealistic in other ways too. Whilst this phrase 'sounds good', is it logical? It seems to assume that a questioner can never ask something in a stupid fashion, whilst at the same time assuming/insulting a respondent with the opposite assumption. (notwithstanding that it can be difficult to find the right words with which to phrase a question - particularly someone learning Python's concepts. Also, we should never forget that many 'here' are not communicating in their primary/home language - thank you for making that effort!) Back when we rode dinosaurs to school, the maxim was "children should be seen and not heard". The teacher was 'the sage on the stage' and questions had to be invited/were not encouraged - talking to others was either "behind the teacher's back" or "cheating", and thus subject to discipline (yes, there was such a thing, once upon a time). Today, there is a more social approach to learning, where questions, of the teacher or of peers are encouraged - and if you'll permit me to disappear into cognitive psychology for a moment, it is a much more efficient way to learn! However, it also requires that whereas we didn't 'interfere' with others' learning by keeping silent, the members of such a 'modern' society find new levels of respect for each other, when it is (not) acceptable to do such things, etc, etc. Contrarily, we also live in 'the Internet Age' which includes the rise of a sense (?right) of "immediacy". In short: we want it now! Sadly, this engenders an apparent motivation to rush 'in' (see also "panic"), rather than holding-fire and thinking first - or as the old dinosaur used to say "put brain into gear, before mouth into motion"! I should also mention that the above is very much a description of how things are 'in the west' (ie 'western world', 'western culture'). Younger colleagues educated in India and China (per example only) tell me that their educational modus 'today' is much closer to my own 'back then'. Accordingly, until friendships are establish, preparedness to ask questions is low - is thought to reveal ignorance, even lack of respect of 'teacher'. There are 'bad questions': - someone unable to immediately solve a problem, turns to his colleague/this list and garbles: - there may be facts, but are they sufficient? - there is often no background to understand the motivation for the question - there is usually a component of 'how do I fix my solution' cf here is the (actual) problem to be solved - laziness, ie asking someone else to exert effort to save self - eg no evidence of an attempted solution - no reference to web or book research - learning avoidance (even 'destruction'): - see current conversation on list where student has clearly said that he is dealing with a teacher-directed assignment So the definition of 'bad question' may boil-down to the motivation of the questioner being 'good' or 'bad', rather than the wording itself. Why are you asking this question? Amusingly enough, that's amongst the training given to anyone learning training (if you follow): always try to (first) understand why the person is asking you this question, then try to answer in similar mode! - a question asked on-impulse pretty much implies that a direct/complete answer will be taken similarly. In which case, it is extremely unlikely that the questioner will *learn* from the experience - thus will be forced to ask again 'next time'. "Give a man a fish and he eats today. Teach a man to fish and he eats every day!" (only an aphorism, sadly not literal fact!) Accordingly, 'answering' the original question with clarification questions is not a 'silly answer'. Indeed neuroscience shows that taking a break from a problem allows the brain to move 'the facts' from "working memory" into 'the back of my mind' and/or more permanent memory (ie learning); and possibly more important to problem-solving, from the logico-cortex into other parts of the brain where 'the facts' become associated with "prior knowledge" and other components of 'intelligence' may be brought to bear. How often have you taken a sh
Re: Trying to figure out the data type from the code snippet
In article , Rick Johnson says... > You know _all_ that What I mentioned is just a small excerpt of what I know :-) > yet... you didn't know about the built-in `type()` method? Exactly :-) > Well, that's just great. We can only hope you don't try your hand at any > mission-critical code. And i suppose when the plane crashes you can always > fall back on the "beautiful plumage" of your resume, eh chap? > Now that you are saying that, I thing I should abandon my 150 km/h racing quadcopter flight controller project :-O Especially because my idea was to use PYTHON for analyzing the data from onboard black box flash in order to fine tune PIDs. Hahah LOL :-) -- Let There Be Light Custom LED driveri prema specifikacijama http://tinyurl.com/customleddriver Chupo -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
In article , Chris Angelico says... > Ah okay. You may want to killfile a few people then, since you're > using an actual real newsreader and have that capability. > Yes, Gravity has Bozo Bin for that purpose :-) But although I've been using newsgroups for 20 years I've never blocked a single person by using a filter because it is not hard to just not open certain messages posted by known authors. Especially nowadays when post count is so low. -- Let There Be Light Custom LED driveri prema specifikacijama http://tinyurl.com/customleddriver Chupo -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
In article , Chris Angelico says... > There are stupid questions, but I enjoy answering those too. You don't > need to apologize for asking these questions. All you need to do is > ignore the trolls like Rick. In fact, if you abandon Google Groups and > instead read the mailing list python-list@python.org, you can just > leave behind all the people who've been blocked. > Thank you for the tip. I am in fact not using Google Groups but am accessing comp.lang.python via nntp:// by using a newsreader. I think Google Groups destroyed usenet. -- Let There Be Light Custom LED driveri prema specifikacijama http://tinyurl.com/customleddriver Chupo -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
On Fri, Feb 1, 2019 at 7:36 AM Chupo via Python-list wrote: > > In article , Chris > Angelico says... > > There are stupid questions, but I enjoy answering those too. You don't > > need to apologize for asking these questions. All you need to do is > > ignore the trolls like Rick. In fact, if you abandon Google Groups and > > instead read the mailing list python-list@python.org, you can just > > leave behind all the people who've been blocked. > > > > Thank you for the tip. > > I am in fact not using Google Groups but am accessing comp.lang.python > via nntp:// by using a newsreader. Ah okay. You may want to killfile a few people then, since you're using an actual real newsreader and have that capability. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
> I was thought > I meant: 'I was taught'. -- Let There Be Light Custom LED driveri prema specifikacijama http://tinyurl.com/customleddriver Chupo -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
On Fri, Feb 1, 2019 at 6:56 AM Chupo via Python-list wrote: > > In article <67d5c4bc-7212-43d0-b44f-7f22efffa...@googlegroups.com>, > Rick Johnson says... > > > > > I'm impressed! But you're asking basic questions that someone with your > > resume should either (1) already know, or (2) be competent enough to find > > on their own. Now don't get me wrong. My intention is not to ridicule you. > > But, with your resume, you should be embarrassed to ask such basic > > questions. You are obviously not an idiot. If you can do what you claim you > > can do, then you are intelligent and driven > person. There are redeemable qualities. Don't waste them. And don't undercut > your reputation by appearing to be a hapless rube. > > > I was thought there aren't stupid questions, just stupid answers and I > for sure won't apologize for asking any question. If someone things the > question I asked is stupid they can ignore it. I am not affraid of > losing my reputation by asking a question. > > There are stupid questions, but I enjoy answering those too. You don't need to apologize for asking these questions. All you need to do is ignore the trolls like Rick. In fact, if you abandon Google Groups and instead read the mailing list python-list@python.org, you can just leave behind all the people who've been blocked. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: Trying to figure out the data type from the code snippet
In article <67d5c4bc-7212-43d0-b44f-7f22efffa...@googlegroups.com>, Rick Johnson says... > I'm impressed! But you're asking basic questions that someone with your > resume should either (1) already know, or (2) be competent enough to find on > their own. Now don't get me wrong. My intention is not to ridicule you. But, > with your resume, you should be embarrassed to ask such basic questions. You > are obviously not an idiot. If you can do what you claim you can do, then you > are intelligent and driven person. There are redeemable qualities. Don't waste them. And don't undercut your reputation by appearing to be a hapless rube. I was thought there aren't stupid questions, just stupid answers and I for sure won't apologize for asking any question. If someone things the question I asked is stupid they can ignore it. I am not affraid of losing my reputation by asking a question. > Hmm. I don't see anything here that a child couldn't be taught to do. You failed to see the point of the code snippet I pasted, let me explain what was my intention to show with that code: Since I said I wrote a driver for 3D printer and since there is: from Printer3D import Head at the beginning of the code and there is: hd = Head(layer) below - from just those two lines you could conclude I wrote Head class meaning I *am* aware what object is. And since hd.printLayer() obviously does print a layer of the material, that means my 3D printer driver is working well. I assumed you could imagine that the driver for driving the head of 3D printer is not just a few lines of code, that it works in real-time and that it interacts with the hardware. > Your reseme may be impressive... What I mentioned is not my resume, I just mentioned what I, knowing only Python basics, did using Python. My resume includes: Embedded devices for industry process control automation (temperature, fluid level, time, data from PID controller, ?); VFD control systems with complex menu structure, user friendly interface, failsafe and data retention; IoT applications; multi-channel sound generation; bike computer; remote data acquisition over RF; data logging; ERP software coding (C#); client&web service sw for warehouse handheld data acquisition system (SOAP requests), software for CNC machines duty simplifications and many more I am an expert on embedded systems design with more than 50,000 lines of C code built-in in various working firmwares. I both designed and built many embedded electronic devices based on various microcontrollers doing all the production stages, designing circuit schematics, calculating the elements, designing printed circuit boards, generating Gerber files according to the manufacturing requirements, soldering components (both TH and SMD) and coding&debugging the firmwares. By utilizing GCC based toolchain and Bare Metal Programming, developing my own libraries and optimizing the most critical routines by writing them in assembler I can often design the devices based on 16 MHz or even just 8 MHz Atmel AVR line of microcontrollers, where others would resort to using 72 MHz ARM or even more powerful processors. Although my carefully optimized devices usually outperform the devices based on even much more powerful hardware, I am using the newest generation of microcontrollers such as ESP8266 and ESP32 as well. I learnt Z80 assembler when I was 10 and after years of coding in both Z80 and 6502 assembler it was easy to start using Microchip's PIC microcontrollers. Later on I switched to Atmel's (now Microchip) microcontrollers and to the newest ones I mentioned before. I can start using completely new family of microcontrollers and completely new toolchains in a matter of days. I coded all sorts of SPI, I2C, UART, 1-Wire etc. and custom communication routines, both using the hardware peripherals and/or bit banging algorithms, hardware/software PWM, efficient debounce algorithms, multitasking environments, routines for precise measuring of pulse lengths, complex ISR routines with carefully calculated T-states (cycles) per pass, DDS algorithms, graphic display libraries, libraries for communicating with various devices (e.g. NRF24L01+), EEPROM wear leveling routines and many more. Furthermore, I have a vast experience with reverse engineering .hex files extracted from microcontrollers which allows me to easily proof the assembly code generated by the compiler in order to - if necessary - rewrite the code in a more efficient way, while my deep understanding of serial and parallel programming protocols, bootloaders, JTAG debugging and inner workings of a microcontroller allows me to cope with all kinds of problems that could be met while developing embedded devices (e.g. noisy environments, black-outs, brown-outs, BUS contention, contact bounce, ?). Additionally, I have a reasonable knowledge of Genetic and other AI algorithms (pathfinding, game
Re: How to replace space in a string with \n
On 2019-01-31, ^Bart wrote:
> Hello everybody! :)
>
> I got a text and I should replace every space with \n without to use
> str.replace, I thought something like this:
>
> text = "The best day of my life!"
>
> space = (' ')
>
> if text.count(' ') in text:
> space=\n
>
> rightText = text-space
>
> print(rightText)
Your code resembles Python code, but it isn't close enough for me
to offer reasonable help.
You should figure out how to solve your problem *before* you
start to write code. A paper and pencil will be required!
--
Neil Cerutti
--
https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On 2019-01-31, ^Bart wrote:
> Hello everybody! :)
>
> I got a text and I should replace every space with \n without to use
> str.replace, I thought something like this:
>
> text = "The best day of my life!"
[...]
> I should have an output like this:
> The
> best
> day
> of
> my
> life!
Here's a solution. But don't turn it in. You're not supposed to know
how to do this yet, and your instructor will know you copied it from the
internet:
print(''.join('\n' if c == ' ' else c for c in text))
--
Grant Edwards grant.b.edwardsYow! over in west
at Philadelphia a puppy is
gmail.comvomiting ...
--
https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On Fri, Feb 1, 2019 at 5:34 AM Grant Edwards wrote: > > On 2019-01-31, Terry Reedy wrote: > > On 1/31/2019 11:19 AM, Ian Clark wrote: > >> text = "The best day of my life!" > >> output = '' > >> > >> for i in text: > >> if i == ' ': > >>output +='\n' > >> else: > >>output += i > >> > >> print(output) > > > But this is an awful, O(n*n) way to solve an inherently O(n) problem, > > How is it O(n^2)? > > It loops through the input sequence exactly once. That looks like > O(n) to me. > Appending onto an immutable string means copying the entire string and adding the new character. (CPython does have an optimization that can sometimes improve this specific case, but in general, this algorithm runs in quadratic time.) ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On 2019-01-31, Grant Edwards wrote: > On 2019-01-31, Terry Reedy wrote: >> On 1/31/2019 11:19 AM, Ian Clark wrote: >>> text = "The best day of my life!" >>> output = '' >>> >>> for i in text: >>> if i == ' ': >>>output +='\n' >>> else: >>>output += i >>> >>> print(output) > >> But this is an awful, O(n*n) way to solve an inherently O(n) problem, > > How is it O(n^2)? > > It loops through the input sequence exactly once. That looks like > O(n) to me. Doh! The 'output +=' operation is also O(n), and it's executed n times. -- Grant Edwards grant.b.edwardsYow! I hope something GOOD at came in the mail today so gmail.comI have a REASON to live!! -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On 2019-01-31, Terry Reedy wrote: > On 1/31/2019 11:19 AM, Ian Clark wrote: >> text = "The best day of my life!" >> output = '' >> >> for i in text: >> if i == ' ': >>output +='\n' >> else: >>output += i >> >> print(output) > But this is an awful, O(n*n) way to solve an inherently O(n) problem, How is it O(n^2)? It loops through the input sequence exactly once. That looks like O(n) to me. -- Grant Edwards grant.b.edwardsYow! Not SENSUOUS ... only at "FROLICSOME" ... and in gmail.comneed of DENTAL WORK ... in PAIN!!! -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On 1/31/2019 11:19 AM, Ian Clark wrote: text = "The best day of my life!" output = '' for i in text: if i == ' ': output +='\n' else: output += i print(output) throwing my hat in the ring, not only is it .replace free it is entirely method free But this is an awful, O(n*n) way to solve an inherently O(n) problem, which I think should not be taught to beginners unless they are simultaneously taught to never do this for indefinitely large n. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
RE: How to replace space in a string with \n
It is amazing to watch what happens when a fairly simple question is asked to see how people answer. In an effort not to ramble, I will summarize my thoughts. The student wanted to know how to solve a problem using only what they already should know and that specifically they should not use a method. In effect, they are being asked to write the kind of code that might be used to make such a method. There were many answers including some that absurdly suggested even more advanced methods they should not know. Frankly, the question belongs more in the sister list for tutoring and even there, the goal is NOT to supply an answer but point out flaws in code provided as an attempt or suggest an outline of a method and let the student fill it out and learn. This is not only a public forum but one that is searchable indefinitely into the future. Providing a full-blown answer not only hands a solution to one student but to their classmates and any future takers. I note another poster asking questions turns out to be not a student but someone quite advanced who likes to learn just in time as they search for what is needed. They require a very different approach and can learn well from being handed a more detailed solution they can interpolate into their project. So, how do you replace? I think a loop answer is probably best for this student. For the second type of questioner, many of the others would be great including suggesting they just use replace as there is nothing wrong with that! NOTE: It is great when we have an exact set of requirements. I note that the requirement here might not require making a new string at all. If you just need to PRINT the words on multiple lines, one solution is to call "print" on each character in the loop using the appropriate method to suppress printing a newline except when you see a blank. -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
text = "The best day of my life!" output = '' for i in text: if i == ' ': output +='\n' else: output += i print(output) throwing my hat in the ring, not only is it .replace free it is entirely method free On Thu, Jan 31, 2019 at 3:41 AM ^Bart wrote: > [Solved by myself and I'm happy!!! :)] > > text = "The best day of my life!" > > space = text[3] > > print (text.replace(space, "\n")) > > [Like what I said in another message, in the afternoon I'll ask to the > teacher if for this exercise we're able to use .replace] > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
[Solved by myself and I'm happy!!! :)] text = "The best day of my life!" space = text[3] print (text.replace(space, "\n")) [Like what I said in another message, in the afternoon I'll ask to the teacher if for this exercise we're able to use .replace] -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
hi ^Bert,
I've just thought that you don't like to use text.replace(' ', '\n'), and so I
came up with another way to get the job done.
So it was part of a "school-test" - uiuitststs ;-)
follow the hint from Peter then, and inside *your* for-loop ask yourself, how
to inspect the value of c in a loop and what to do *if* the value of c was ' ' .
as mentioned, a string is immuteable, so you cannot change it *inplace* - you
have to build a new str-object (has a new object-id the starting with an empty
string say
newtext = ''
and with each loop over your original text you add one character like
newtext = newtext+c
and only if c has a value of ' ', then you add a different value like '\n'
well, now you should try to understand peters for-loop, and then you should try
to combine what you have learned with the if-statement within the for(-loop)
block
happy learning the python-language! It's a great one, this I can promise you!
regards
Michael
* Peter Otten <__pete...@web.de> [2019-01-31 11:15]:
> ^Bart wrote:
>
> >> Why?
> >
> > It's a school test, now we should use just what we studied, if than,
> > else, sequences, etc.!
> >
> > ^Bart
>
> Hint: you can iterate over the characters of a string
>
> >>> for c in "hello":
> ... print(c)
> ...
> h
> e
> l
> l
> o
>
>
>
>
> --
> https://mail.python.org/mailman/listinfo/python-list
--
Michael Poeltl
Computational Materials Physics at University
Wien, Sensengasse 8/12, A-1090 Wien, AUSTRIA
http://cmp.univie.ac.at/
http://homepage.univie.ac.at/michael.poeltl/
using elinks-0.12, mutt-1.5.21, and vim-7.4,
with python-3.6.1, on linux mint 17.3 (rose) :-)
fon: +43-1-4277-51409
"Lehrend lernen wir!"
--
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Re: How to replace space in a string with \n
On Thu, Jan 31, 2019 at 9:56 PM ^Bart wrote: > > >You coulde use »sub« from the module »re«, then. > >(The Python Library Reference, Release 3.8.0a0 - > >6.2 re - Regular expression operations) > > We're using 3.7.2 :\ > Don't worry about that difference - 3.8 is only minorly different from 3.7. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On 31/01/19 11:47, ^Bart wrote: >> . A correct answer to the exercise would be: >> >> |You cannot replace a space with \n in a string, >> |because strings are immutable in Python. > > Yes, I thought in a wrong way! :) > Well maybe you can turn the string into a list of characters. Then replace the spaces with newlines and finaly turn the list into a string again. -- Antoon. -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
No it is not the proper way of a school test to copy what others provided. You're right but I need just to understand what tools I should use, it could be nice if the teacher says something like "use just these three tools to solve this problem" or "you don't need to use these other tools to do it!" I hope you understood what I mean... ^Bart -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
You coulde use »sub« from the module »re«, then. (The Python Library Reference, Release 3.8.0a0 - 6.2 re - Regular expression operations) We're using 3.7.2 :\ Otherwise, Write a loop that takes the first character from the source and appends it to a new string until there is no more character left in the source. You now should have written a loop that copies the string character by character. Then it is easy to modify the loop a little bit to complete the exercise. I'll ask it to the teacher this afternoon, thanks for your reply! :) ^Bart -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
. A correct answer to the exercise would be: |You cannot replace a space with \n in a string, |because strings are immutable in Python. Yes, I thought in a wrong way! :) -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
Il 31/01/19 10:34, Michael Poeltl ha scritto: hi, Maybe this is a proper way to do what you'd liked to achieve text = "The best day of my life!" newtext = '\n'.join( text.split() ) print(newtext) The best day of my life! yours Michael Thanks Michael, I'll ask to my teacher in the afternoon if he has the same idea, you know when you start a new language you should solve problems just with few things, when your mind understood how the language works you can use every tools of this language! :) ^Bart -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
Have you even tried to run this?
No, it doesn't run, it's just a personal idea! :)
I don't think this does what you think it does.
text.count(' ') will return 5, an integer. So you are testing if 5 is in text.
But since
5 is an integer that will raise a TypeError.
Yes, I understood this is wrong!
rightText = text-space
Where does text-space come from?
I thought to use (text) - (space), space is " " but I should replace in
text what I said in the variable is space.
I know there are a lot o solutions but this afternoon I'll ask to the
teacher what we should do to do it!
Thank you very much for your reply! :)
^Bart
--
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Re: How to replace space in a string with \n
On 31/01/19 10:37, Michael Poeltl wrote: > hi, > > ^Bart ended in a Mail-Delivery... > so I send it ONLY to the python-list > > ^Bert, a proper way to do what you'd liked to achieve is the following: No it is not the proper way of a school test to copy what others provided. -- Antoon. -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On 31/01/19 10:18, ^Bart wrote:
> Hello everybody! :)
>
> I got a text and I should replace every space with \n without to use
> str.replace, I thought something like this:
Have you even tried to run this?
>
> text = "The best day of my life!"
>
> space = (' ')
>
> if text.count(' ') in text:
> space=\n
I don't think this does what you think it does.
text.count(' ') will return 5, an integer. So you are testing if 5 is in text.
But since
5 is an integer that will raise a TypeError.
>
> rightText = text-space
Where does text-space come from?
--
Antoon.
--
https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
^Bart wrote: >> Why? > > It's a school test, now we should use just what we studied, if than, > else, sequences, etc.! > > ^Bart Hint: you can iterate over the characters of a string >>> for c in "hello": ... print(c) ... h e l l o -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
hi,
^Bart ended in a Mail-Delivery...
so I send it ONLY to the python-list
^Bert, a proper way to do what you'd liked to achieve is the following:
>>> text = "The best day of my life!"
>>> newtext = '\n'.join( text.split() )
>>> print(newtext)
The
best
day
of
my
life!
>>>
regards
Michael
* ^Bart [2019-01-31 10:22]:
> Hello everybody! :)
>
> I got a text and I should replace every space with \n without to use
> str.replace, I thought something like this:
>
> text = "The best day of my life!"
>
> space = (' ')
>
> if text.count(' ') in text:
> space=\n
>
> rightText = text-space
>
> print(rightText)
>
> I should have an output like this:
> The
> best
> day
> of
> my
> life!
>
> --
> https://mail.python.org/mailman/listinfo/python-list
--
Michael Poeltl
Computational Materials Physics at University
Wien, Sensengasse 8/12, A-1090 Wien, AUSTRIA
http://cmp.univie.ac.at/
http://homepage.univie.ac.at/michael.poeltl/
using elinks-0.12, mutt-1.5.21, and vim-7.4,
with python-3.6.1, on linux mint 17.3 (rose) :-)
fon: +43-1-4277-51409
"Lehrend lernen wir!"
--
https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
hi,
Maybe this is a proper way to do what you'd liked to achieve
>>> text = "The best day of my life!"
>>> newtext = '\n'.join( text.split() )
>>> print(newtext)
The
best
day
of
my
life!
>>>
yours
Michael
* ^Bart [2019-01-31 10:22]:
> Hello everybody! :)
>
> I got a text and I should replace every space with \n without to use
> str.replace, I thought something like this:
>
> text = "The best day of my life!"
>
> space = (' ')
>
> if text.count(' ') in text:
> space=\n
>
> rightText = text-space
>
> print(rightText)
>
> I should have an output like this:
> The
> best
> day
> of
> my
> life!
>
> --
> https://mail.python.org/mailman/listinfo/python-list
--
Michael Poeltl
Computational Materials Physics at University
Wien, Sensengasse 8/12, A-1090 Wien, AUSTRIA
http://cmp.univie.ac.at/
http://homepage.univie.ac.at/michael.poeltl/
using elinks-0.12, mutt-1.5.21, and vim-7.4,
with python-3.6.1, on linux mint 17.3 (rose) :-)
fon: +43-1-4277-51409
"Lehrend lernen wir!"
--
https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
maybe this is an alternative way to get your wished result.
>>> text = "The best day of my life!"
>>> newtext = '\n'.join( text.split() )
>>> print(newtext)
The
best
day
of
my
life!
>>>
yours
Michael
* ^Bart [2019-01-31 10:22]:
> Hello everybody! :)
>
> I got a text and I should replace every space with \n without to use
> str.replace, I thought something like this:
>
> text = "The best day of my life!"
>
> space = (' ')
>
> if text.count(' ') in text:
> space=\n
>
> rightText = text-space
>
> print(rightText)
>
> I should have an output like this:
> The
> best
> day
> of
> my
> life!
>
> --
> https://mail.python.org/mailman/listinfo/python-list
--
Michael Poeltl
Computational Materials Physics at University
Wien, Sensengasse 8/12, A-1090 Wien, AUSTRIA
http://cmp.univie.ac.at/
http://homepage.univie.ac.at/michael.poeltl/
using elinks-0.12, mutt-1.5.21, and vim-7.4,
with python-3.6.1, on linux mint 17.3 (rose) :-)
fon: +43-1-4277-51409
"Lehrend lernen wir!"
--
https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
Why? It's a school test, now we should use just what we studied, if than, else, sequences, etc.! ^Bart -- https://mail.python.org/mailman/listinfo/python-list
Re: How to replace space in a string with \n
On Thu, 31 Jan 2019 10:18:20 +0100, ^Bart wrote:
> Hello everybody! :)
>
> I got a text and I should replace every space with \n without to use
> str.replace,
Why?
> I thought something like this:
>
> text = "The best day of my life!"
>
> space = (' ')
>
> if text.count(' ') in text:
> space=\n
>
> rightText = text-space
>
> print(rightText)
>
> I should have an output like this:
> The best day of my life!
--
There is nothing new except what has been forgotten.
-- Marie Antoinette
--
https://mail.python.org/mailman/listinfo/python-list
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At the last General Assembly of the EuroPython Society (EPS) at EuroPython 2018 in Edinburgh, we voted on a new grant program we want to put in place for future EuroPython conferences. We all love Python and this is one of the main reasons we are putting on EuroPython year after year, serving the "cast of thousands" which support Python. But we also believe it is important to give something back to the main team of developers who have contributed lots of their time and energy to make Python happen: the Python Core Developers. This group is small, works countless hours, often in their free time and often close to burnout due to not enough new core developers joining the team. Free Tickets for Python Core Developers --- To help with growing the team, putting it more into the spotlight and give them a place to meet, demonstrate their work and a stage to invite new developers, we decided to give Python Core Developers free entry to future EuroPython conferences, starting with EuroPython 2019 in Basel, Switzerland In recognition of Guido’s almost 20 years of leading this team, and with his permission, we have named the grant “Guido van Rossum Core Developer Grant”. Details of the grant program are available on our core grant page: https://www.europython-society.org/core-grant PS: If you are a core developer and want to organize a workshop, language summit or similar event at EuroPython 2019, please get in touch with our program workgroup (prog...@europython.eu) soon, so that we can arrange rooms, slots, etc. PPS: If you want to become a core developer, please have a look at the Python Dev Guide: https://devguide.python.org/coredev/ Help spread the word Please help us spread this message by sharing it on your social networks as widely as possible. Thank you ! Link to the blog post: https://www.europython-society.org/post/182445627020/announcing-the-guido-van-rossum-core-developer Tweet: https://twitter.com/europythons/status/1090901995635073024 Enjoy, -- EuroPython Society https://ep2019.europython.eu/ https://www.europython-society.org/ -- https://mail.python.org/mailman/listinfo/python-list
How to replace space in a string with \n
Hello everybody! :)
I got a text and I should replace every space with \n without to use
str.replace, I thought something like this:
text = "The best day of my life!"
space = (' ')
if text.count(' ') in text:
space=\n
rightText = text-space
print(rightText)
I should have an output like this:
The
best
day
of
my
life!
--
https://mail.python.org/mailman/listinfo/python-list
