Re: [Tutor] Urgent Help Required
On 02/04/2012 08:17 AM, Zafrullah Syed wrote: Hi, I need urgent help: I am unable to commit code to svn, I am getting this warning: *svn: Commit failed (details follow):* *svn: Commit blocked by pre-commit hook (exit code 1) with output:* *string:17: Warning: 'with' will become a reserved keyword in Python 2.6* *writeConf.py:17: invalid syntax* *Commited Python-Files refused, please check and retry...* How do i surpass this and commit my code?? Lousy choice of subject. Please make your subject reflect what your problem is, not how important it may or may not be to you. You're not just running svn. If you were, you'd not get some python error or warning. So you're running a more complex environment, perhaps svn integrated inside some IDE (like komodo, wingware, beans, whatever). If so, post a question on the forum that supports that particular IDE. Or if you must post here, at least give us a clue what environment you're using. For example, i can infer that you're running Python 2.5 or older. But it'd be much better to explicitly say what python version, which operating system (and version), and what IDE (and version), and what svn (get the pattern?). The svn command to submit changes to a file outside of the ide is svn commit filename. If the file is new, I believe you have to do an svn add. -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] urgent help!!!!!!!!!!!
On 11/17/2011 3:26 PM ADRIAN KELLY said... i know i'm stupid but i have tried everything to get one line of text working, i have written out pseudo and read every website. now i am getting this error Traceback (most recent call last): File F:\VTOS ATHLONE\PYTHON_VTOS\foreign exchange\f_ex4 - Copy.py, line 24, in module main() File F:\VTOS ATHLONE\PYTHON_VTOS\foreign exchange\f_ex4 - Copy.py, line 14, in main while amount50: UnboundLocalError: local variable 'amount' referenced before assignment You've seen the fixes, but perhaps more explanation helps too. Python organizes variables into namespaces. The normal namespace resolution sequence is local, global, builtin. Assigning to a name within a function creates a local variable, otherwise accessing a name in a function will use the global or builtin namespaces. Python decides these issues in part during initial loading of the module where it sees that you assign to the variable amount within the function, thus creating a local variable. Later, during execution, you first test the value of amount (in the while statement), but amount isn't assigned to until after the test, ergo, UnboundLocalError. HTH, Emile ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] urgent help!!!!!!!!!!!
My mail client stripped new lines, at least on this machine, so I will
just top-post this. Sorry!
Your problem is that you say:
amount=0
def main()...
You then try to use amount in main, but main has no amount in it.
Either move amount=0 inside main, or put a global reference:
amount=0
def main():
global amount
...
On 11/17/11, ADRIAN KELLY kellyadr...@hotmail.com wrote:
i know i'm stupid but i have tried everything to get one line of text
working, i have written out pseudo and read every website.now i am
getting this error
Traceback (most recent call last): File F:\VTOS
ATHLONE\PYTHON_VTOS\foreign exchange\f_ex4 - Copy.py, line 24, in module
main() File F:\VTOS ATHLONE\PYTHON_VTOS\foreign exchange\f_ex4 -
Copy.py, line 14, in mainwhile amount50:UnboundLocalError: local
variable 'amount' referenced before assignment
def exchange(cash_in):euro=1dollar=1.35base=50if
cash_inbase:totalreturn=cash_in*dollarelse:
totalreturn=0return totalreturn
amount=0def main():while amount50:amount = raw_input(float('how
much do you want to change:'))if amount50:total=0print
'enter an amount over 50: 'else:total=exchange(amount)
print 'Your exchange comes to: ',total
Adrian Kelly
1 Bramble Close
Baylough
Athlone
County Westmeath
0879495663
From: waynejwer...@gmail.com
Date: Thu, 17 Nov 2011 16:53:59 -0600
Subject: Re: [Tutor] please help - stuck for hours
To: kellyadr...@hotmail.com
CC: tutor@python.org
On Thu, Nov 17, 2011 at 4:32 PM, ADRIAN KELLY kellyadr...@hotmail.com
wrote:
thanks very much, great response really really appreciated it and now i
understand. i hate to ask again but can you see why it won't print the
'enter and amount over 50' in the right place??
Computers are unfailingly stupid machines. They will do whatever wrong thing
you tell them to do every single time.
snipdef main():amount=0while amount50:amount =
input('how much do you want to change:')
print 'enter an amount over €50: 'else:
total=exchange(amount)print 'Your exchange comes to: ',total
Sometimes it helps writing out the logic in steps before you translate it to
code. In this case my guess is that these are the steps you want:
1. Get a value from the user (you're still using input - stop that, it's
dangerous! input is only a good function in 3.x where it replaces
raw_input)
2. If the value is less than 50, tell the user to enter an amount 50
and repeat step 1
3. Otherwise, exchange the amount and display that.
Right now, these are the steps that you're doing:
1. Get a value from the user
2. Display the error message
3. If the value is 50, go to 1
4. exchange the amount
5. display the amount.
HTH,Wayne
--
Have a great day,
Alex (msg sent from GMail website)
mehg...@gmail.com; http://www.facebook.com/mehgcap
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Re: [Tutor] urgent help!!!!!!!!!!!
def exchange(cash_in):
euro=1
dollar=1.35
base=50
if cash_inbase:
totalreturn=cash_in*dollar
else:
totalreturn=0
return totalreturn
amount=0
# this would be better placed inside the main function.
def main():
while amount50:
amount = raw_input(float('how much do you want to change:'))
# This should be
# amount = float( raw_input('how much do you want to change:' ) )
if amount50:
total=0
print 'enter an amount over 50: '
else:
total=exchange(amount)
print 'Your exchange comes to: ',total
Ramit
Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
712 Main Street | Houston, TX 77002
work phone: 713 - 216 - 5423
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This email is confidential and subject to important disclaimers and
conditions including on offers for the purchase or sale of
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Re: [Tutor] urgent help required! invalid syntax
On 18-02-11 09:42, lim chee siong wrote: Hi, I was writing a module for the black-scholes pricing model in python, but I keep getting this error message: Traceback (most recent call last): File stdin, line 1, in module File C:\Python26\lib\blackscholes.py, line 25 d2=d1-v*sqrt(t) That's not the whole traceback, is it? This is the code in my blackscholes.py file: #Black-Scholes model [snip] def dividend(s,x,r,t,v): d1=(log(s/x)+((r+v**2/2)*t)/(v*sqrt(t)) d2=d1-v*sqrt(t) [snip] What is wrong here? What do I need to change? Check the line before the line which throws a syntax error. Have a good look at it and you will see you are missing a character. Cheers, Timo Thanks! Quick reply will be much appreciated because the deadline is tomorrow! ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] urgent help required! invalid syntax
lim chee siong wrote: Hi, I was writing a module for the black-scholes pricing model in python, but I keep getting this error message: Traceback (most recent call last): File stdin, line 1, in module File C:\Python26\lib\blackscholes.py, line 25d2=d1-v*sqrt(t) Please COPY AND PASTE the FULL error message, including the entire traceback. Do not re-type it, summarise it, simplify it, or change it in any other way. But my guess is that you're probably missing a closing bracket ) on that line, or the one before it. -- Steven ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] urgent help required! invalid syntax
There's a few things I've noticed: 1. I would recommend using an IDE of some sort. I copy and pasted this into eclipse, and it told me straight away that you had a parenthesis problem on this line: d1=(log(s/x)+((r+v**2/2)*t)/(v*sqrt(t)) 2. Your function dividend isn't returning a value. 3. Unless there is more to the program that you haven't shown us, all of the math stuff that I can see, such as sqrt, pi, log, exp and possibly others I'm not thinking of should be prefixed with math.. 4. The function BS isn't returning anything. 5. Lastly, if you are a familiar with object oriented programing, the black scholes is better suited towards OOP. 2011/2/18 lim chee siong doggy_lolli...@hotmail.com Hi, I was writing a module for the black-scholes pricing model in python, but I keep getting this error message: Traceback (most recent call last): File stdin, line 1, in module File C:\Python26\lib\blackscholes.py, line 25 d2=d1-v*sqrt(t) This is the code in my blackscholes.py file: #Black-Scholes model import math import numpy import scipy #Cumulative normal distribution def CND(x): (a1,a2,a3,a4,a5)=(0.31938153,-0.356563782,1.781477937,-1.821255978,1.330274429) L=abs(x) K=1.0/(1.0+0.2316419*L) w=1.0-1.0/sqrt(2*pi)*exp(-L*L/2)*(a1*K+a2*K*K+a3*pow(K,3)+a4*pow(K,4)+a5*pow(K, 5)) if x0: w=1.0-w return w #s: price of underlying stockx:strike price #r: continuously compounded risk free interest rate #t: time in years until expiration of option #v: implied volatility of underlying stock def dividend(s,x,r,t,v): d1=(log(s/x)+((r+v**2/2)*t)/(v*sqrt(t)) d2=d1-v*sqrt(t) def BS(s,x,r,t,v): c=s*CND(d1)-x*exp(-r*t)*CND(d2) p=x*exp(-r*t)*CND(-d2)-s*CND(-d1) delta=CND(d1)-1 gamma=CND(d1)/(s*v*sqrt(t)) vega=s*CND(d1)*sqrt(t) theta=-((s*CND(d1)*v)/(2*sqrt(t))+r*x*exp(-r*t)*CND(-d2) rho=-x*t*exp(-r*t)*CND(-d2) What is wrong here? What do I need to change? Thanks! Quick reply will be much appreciated because the deadline is tomorrow! ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Urgent: Help
Shumail Siddiqui [EMAIL PROTECTED] wrote I have a question regarding a functions based assignment. The assignment is: For this project, you will write two small Python programs: OK, Since this is for homework I cannot give you the answers but I will point out some things you shouild look at and an approach. Investment Thresholds Define a Python function threshold(dailyGains, goal) that behaves as follows. First define the function and test it using the prompt. Write a small Python program that uses your threshold() function to demonstrate that it works correctly. Your program may use a pre-defined list of stock gains or it may generate one randomly Use a predefined list initially, it's easier! Only once that works try introducing random elements. Word Windows One problem at a time... This is what I have so far: import random dailyGains = int(random.range(6)) goal = random.choice(range(4) missing parenthesis, I assume a typo? result = [] def threshold(dailyGains, goal): if goal!= result: 0 else: result.reverse() result.remove() you need to investigate the return statement in functions. However I don;t understand how you think this will achieve anything like what the original specification asked for. You need to use the dailyGains list somewhere... And why you are checking against result I don't know. Can you describe in English what the function should do and how you would go about it manually using pen and paper? Can you translate that process to Python? As you can see I am having a great problem. It looks like the normal learning process to me :-) Just take your time, solve one bit at a time and build on your previous work. If you get stuck come back here and ask specific questions and show us what you have done. HTH, -- Alan Gauld Author of the Learn to Program web site http://www.freenetpages.co.uk/hp/alan.gauld ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Urgent: Help
Shumail Siddiqui wrote: Dear tutor, I have a question regarding a functions based assignment. I agree with Alan. And I wonder why this assignment is hard for you. Are you in the wrong course (insufficient prerequisites)? Is the instructor failing to provide the resources you need? Are you overwhelmed with life and struggling to get through? Or do you just want to get a passing grade and don't care about learning programming and Python? It might help us if we understood why you are seeking help. Bob ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Urgent: Help
Please reply to the list not just me. We all participate and learn. Shumail Siddiqui wrote: I know this assignment is not too hard, but I have been greatly overwhelmed with work as I have been taking a 19 credits recently. I kind of have an approach to this by importing random numbers and random.choice leaves the first four numbers as a result. But, I don't know how to add these numbers in the program, One approach is: start with a total of 0 add the first number to the total if the total does not reach the goal add the next number etc. That can be implemented in a loop. Give it a try and show us how far you can come. while I know that I can use append to add those scores. I don't know how to use append to add ___ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
