Re: Problem to calculate the mean in version 3.4
Michel Guirguis wrote: > I have downloaded the version 3.4 and I have a problem to calculate the > mean. The software does not recognise the function mean(). I am getting > the following error. > mean([1, 2, 3, 4, 4]) > Traceback (most recent call last): > File "", line 1, in > mean([1, 2, 3, 4, 4]) > NameError: name 'mean' is not defined > > Could you please help. Is it possible to send me the version that > calculate statistics. The help for the statistics and other modules assumes basic knowledge of Python. I recommend you read the tutorial or any other introductory text on Python before you proceed. Regarding your actual question: before you can use a function you have to import it. There are two ways: (1) Recommended: import the module and use the qualified name: >>> import statistics >>> statistics.mean([1, 2, 3, 4, 4]) 2.8 (2) Import the function. Typically done when you want to use it in the interactive interpreter, not in a script. >>> from statistics import mean >>> mean([1, 2, 3, 4, 4]) 2.8 -- https://mail.python.org/mailman/listinfo/python-list
Re: Problem to calculate the mean in version 3.4
Michel Guirguis writes: mean([1, 2, 3, 4, 4]) > Traceback (most recent call last):... > NameError: name 'mean' is not defined Before you can use that function, you have to import the statistics module, e.g.: >>> import statistics >>> statistics.mean([1,2,3,4,4]) or >>> from statistics import mean >>> mean([1,2,3,4,4]) -- https://mail.python.org/mailman/listinfo/python-list
Re: ConnectionError handling problem
On 24Sep2015 22:46, shiva upreti wrote:
On Friday, September 25, 2015 at 10:55:45 AM UTC+5:30, Cameron Simpson wrote:
On 24Sep2015 20:57, shiva upreti wrote:
>Thank you Cameron.
>I think the problem with my code is that it just hangs without raising any
>exceptions. And as mentioned by Laura above that when I press CTRL+C, it
>just catches that exception and prints ConnectionError which is definitely
>a lie in this case as you mentioned.
Ok. You original code says:
try:
r=requests.post(url, data=query_args)
except:
print "Connection error"
and presumably we think your code is hanging inside the requests.post call? You
should probably try to verify that, because if it is elsewhere you need to
figure out where (lots of print statements is a first start on that).
I would open two terminals. Run your program until it hangs in one.
While it is hung, examine the network status. I'll presume you're on a UNIX
system of some kind, probably Linux? If not it may be harder (or just require
someone other than me).
If it is hung in the .post call, quite possibly it has an established connecion
to the target server - maybe that server is hanging.
The shell command:
netstat -rn | fgrep 172.16.68.6 | fgrep 8090
will show every connection to your server hosting the URL
"http://172.16.68.6:8090/login.xml";. That will tell you if you have a
connection (if you are the only person doing the connecting from your machine).
If you have the "lsof" program (possibly in /usr/sbin, so "/usr/sbin/lsof") you
can also examine the state of your hung Python program. This:
lsof -p 12345
will report on the open files and network connections of the process with pid
12345. Adjust to suit: you can find your program's pid ("process id") with the
"ps" command, or by backgrounding your program an issuing the "jobs" command,
which should show the process id more directly.
Cheers,
Cameron Simpson
--
https://mail.python.org/mailman/listinfo/python-list
Re: PyInstaller+ Python3.5 (h5py import error)
On Thursday, September 24, 2015 at 1:12:31 PM UTC+2, Laura Creighton wrote: > In a message of Thu, 24 Sep 2015 02:58:35 -0700, Heli Nix writes: > >Thanks Christian, > > > >It turned out that h5py.defs was not the only hidden import that I needed to > >add. > > > >I managed to get it working with the follwoing command adding 4 hidden > >imports. > > > > > >pyinstaller --hidden-import=h5py.defs --hidden-import=h5py.utils > >--hidden-import=h5py.h5ac --hidden-import=h5py._proxy test.py > > > > > >is there anyway that you can use to add all h5py submodules all together? > > > >Thanks, > > > > Yes. You can use a hook file. > see: https://pythonhosted.org/PyInstaller/#using-hook-files > > Laura Thanks Laura, Very Useful, -- https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
On Thu, 24 Sep 2015 11:45:06 -0700, codywcox wrote:
> I seem to be having a problem understanding how arguments and parameters
> work, Most likely why my code will not run.
> Can anyone elaborate on what I am doing wrong?
>
> '''
> Cody Cox 9/16/2015 Programming Exercise 1 - Kilometer Converter Design a
> modular program that asks the user to enter a distance in kilometers and
> then convert it to miles Miles = Kilometers * 0.6214 '''
>
> def main():
>get_input()
>convert_kilo()
>
>
> def get_input(kilo):
>kilo = float(input('Enter Kilometers: '))
>return kilo
>
> def convert_kilo(kilo,miles):
> miles = float(kilo * 0.6214)
> print( kilo,' kilometers converts to ',miles,' miles')
>
> main()
clearly a homework exercise but you have asked for help in understanding
& not just for a solution which is good.
as others have pointed out you are throwing away the data returned from
get_input
I would also suggest that you return the result form convert_kilo instead
of printing it in the function & print it in the main loop instead.
kilo=get_input()
miles=convert_kilo(kilo)
print (miles)
it does not matter for this trivial assignment but as you progress
further you will discovery it is better to keep output seperated from the
main logic of the program.
--
What is mind? No matter. What is matter? Never mind.
-- Thomas Hewitt Key, 1799-1875
--
https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
Awesome guys! Thank you for helping me understand this material. Parameters and Arguments are tricky. Looks like its mainly a game of connect the dots with variables. lol. When you return a variable, it needs somewhere to go, and that's why it goes to the next call into the argument area if I need to use that piece of information for a calculation, right? so if I understand correctly, when I create a function and return a variable, that variable needs to go in the argument when it is called? or into another functions argument for calculation? I apologize if I sound dumb. lol. I know this must be very elementary. Yes this is a homework assignment, but I was trying to figure out how parameters and arguments work, not get an answer, this was a huge help. I will keep looking over your details over and over to make sure I understand. Appreciate all the help and understanding! :) -Cody -- https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
Oh, i also noticed that declaring the variable I was using and setting it =0.0 helped me out, seems the program had "garbage" in it... (that's what my professor said.) -- https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
#Cody Cox
#9/16/2015
#Programming Exercise 1 - Kilometer Converter
#Design a modular program that asks the user to enter a distance in kilometers
and then covert it to miles
# Miles = Kilometers * 0.6214
def main():
#set the variable to 0.0, makes it a float and creates a place in memory
for the variable.
kilo = 0.0
'''
this I am not sure about, I set Kilo=get_input(kilo), but why do I need the
argument when
I am going to pass it to convert_to_kilometers? but the program works so I
am guessing that is where it is saving
the variable in order to be passed? so it needs to be returned as an
argument to be passed as an argument for
the next call???
'''
kilo = get_input(kilo)
convert_to_kilometers(kilo)
def get_input(kilo):
kilo =float(input('Enter the amount of Kilometers: '))
return kilo
def convert_to_kilometers(kilo):
miles = kilo * .6214
print(kilo,'Kilometers converts to: ',miles, ' Miles.')
main()
'''
This was a great learning experience trying to understand modules
and how parameters & arguments work together.
Thanks for helping me understand
'''
--
https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
On Fri, Sep 25, 2015 at 1:03 PM, Cody Cox wrote:
> def main():
> #set the variable to 0.0, makes it a float and creates a place in memory
> for the variable.
> kilo = 0.0
This is addressing a symptom, not the actual problem. Initializing
kilo here prevents Python from complaining when you try to access the
kilo variable in the "kilo = get_input(kilo)" line below. However, you
don't need it there either.
> '''
> this I am not sure about, I set Kilo=get_input(kilo), but why do I need
> the argument when
> I am going to pass it to convert_to_kilometers? but the program works so
> I am guessing that is where it is saving
> the variable in order to be passed? so it needs to be returned as an
> argument to be passed as an argument for
> the next call???
>
> '''
> kilo = get_input(kilo)
No, you don't need the argument at all. You use arguments to pass in
data that the function needs to do its work. In this case you're
passing in the *current* value of kilo, which you set above to be 0.0.
This isn't data that is needed by get_input, so you shouldn't pass it
in (and the get_input function should not require it).
The result of the get_input call is then assigned to kilo, replacing
the 0.0 which you don't need. It's fine for kilo to be initialized
with this line rather than the one above.
> convert_to_kilometers(kilo)
This is okay, but as you get more advanced you will probably want this
function to return a value, which you could store in another variable,
e.g.:
miles = convert_to_miles(kilo)
> def get_input(kilo):
> kilo =float(input('Enter the amount of Kilometers: '))
> return kilo
As noted above, this function should not have kilo as a parameter. It
never uses it. This function needs to return kilo *to* its caller, not
take a value for kilo *from* its caller.
> def convert_to_kilometers(kilo):
> miles = kilo * .6214
> print(kilo,'Kilometers converts to: ',miles, ' Miles.')
This is fine but poorly named. This function converts kilometers to
miles. It doesn't convert anything to kilometers as suggested by the
name.
And again, as you get more advanced you would probably want this to
return the value of miles rather than just print it.
--
https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
In a message of Fri, 25 Sep 2015 11:50:10 -0700, Cody Cox writes:
>Awesome guys! Thank you for helping me understand this material. Parameters
>and Arguments are tricky. Looks like its mainly a game of connect the dots
>with variables. lol.
>
>When you return a variable, it needs somewhere to go, and that's why it goes
>to the next call into the argument area if I need to use that piece of
>information for a calculation, right?
No.
>so if I understand correctly, when I create a function and return a variable,
>that variable needs to go in the argument when it is called? or into another
>functions argument for calculation?
>I apologize if I sound dumb. lol. I know this must be very elementary.
No.
>Yes this is a homework assignment, but I was trying to figure out how
>parameters and arguments work, not get an answer, this was a huge help. I will
>keep looking over your details over and over to make sure I understand.
>
>Appreciate all the help and understanding! :)
>
>-Cody
You have a very basic conceptual misunderstanding.
def main():
count = 0
animals = 'tigers'
change_my_value_to_50_frogs(count, animals)
print ("I fought", count, animals)
def change_my_value_to_50_frogs(count, animals):
count = 50
animals = 'frogs'
main()
-
I am pretty sure you expect this code to print 'I fought 50 frogs'.
It doesn't. It prints 'I fought 0 tigers'.
You have the idea that when you pass parameters to a function, by name,
you want the values of those parameters to get changed by the function.
(and I sort of cheated by calling the function change_my_value).
This is not what happens. You cannot change values this way.
so we rewrite change_my_value_to_50_frogs
def fifty_frogs():
count = 50
animals = 'frogs'
return count, animals
Now fifty_frogs is going to happily return the changed values you wanted.
But you have to set up your main program to receive those changed values
you wanted.
so we rewrite main as:
def main():
count = 0
animals = 'tigers'
count, animals = fifty_frogs()
print ("I fought", count, animals)
now
main()
says 'I fought 50 frogs'.
NOTE: there is nothing, nothing, nothing special about the fact that
in fifty_frogs I used the names 'count' and 'animals'.
Let us try a new version of fifty_frogs()
def fifty_frogs():
experience = 50
monsters = 'frogs'
return experience, monsters
All the same, just different words.
Does that matter?
No. You are going to return whatever is called 'experience' and
whatever is called 'monsters' and assign them to 'count' and 'monsters'.
Whether you name these things the same thing, or different things
makes no difference.
Does this make sense?
If not, come back with more questions. And play around with the
python interactive interpreter, or idle -- that is what it is for.
neat little experiements like this. :)
Laura
--
https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
In a message of Fri, 25 Sep 2015 22:15:26 +0200, Laura Creighton writes: >No. You are going to return whatever is called 'experience' and >whatever is called 'monsters' and assign them to 'count' and 'monsters'. ARRGH! I meant assign them to 'count' and 'animals'. (I read that 3 times and _still_ got it wrong!) I am very sorry for this confusion. Laura -- https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
On Friday, September 25, 2015 at 1:26:02 PM UTC-7, Laura Creighton wrote: > In a message of Fri, 25 Sep 2015 22:15:26 +0200, Laura Creighton writes: > > >No. You are going to return whatever is called 'experience' and > >whatever is called 'monsters' and assign them to 'count' and 'monsters'. > > ARRGH! I meant > assign them to 'count' and 'animals'. > (I read that 3 times and _still_ got it wrong!) > I am very sorry for this confusion. > Laura All good, I got the idea, and you explained it very nicly. thank you for this example. I shall be back with more questions! haha. -Cody -- https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
On Fri, 25 Sep 2015 12:03:43 -0700, Cody Cox wrote:
> #Design a modular program that asks the user to enter a distance in
> kilometers and then covert it to miles # Miles = Kilometers * 0.6214
#!/usr/bin/python
# main calls the input routine to get the km value, then
# calls the conversion routine to convert the km value
# to miles, then prints the output
def main():
km = get_kms()
mi = convert_km_mi(k)
print "{} Km is {} miles.".format(km, mi)
# get_float_input() reads a float input using the supplied
# prompt.
def get_float_input(prompt):
return float(input(prompt))
# Get kms uses the generic get_float_input to read a km
# value
def get_kms():
return get_float_input("Enter Kms: ")
# generic conversion function
def convert_float_a_b(a, factor):
return float(a * factor)
# convert km_mi uses the generic converter
# to convert km to miles
def convert_km_mi(km):
return convert_float_a_b(km, 0.6214)
# now call main to kick it all off
main()
--
Denis McMahon, denismfmcma...@gmail.com
--
https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
On 9/25/2015 2:50 PM, Cody Cox wrote: Awesome guys! Thank you for helping me understand this material. Parameters and Arguments are tricky. Looks like its mainly a game of connect the dots with variables. lol. If you stick with the convention that parameters are names in the header of a function definition, arguments are objects in a function call, and calls bind parameter names to argements (or sometimes collected arguments), then it is not so tricky. But also remember that not everyone follows this convention, or even any consistent usage. To reiterate about calling and binding. def f(x): pass f(2) binds the name 'x' to the int object with value 2. This is essentially the same as 'x = 2', except that the binding takes place in the local namespace of the function rather than in the local namespace of the call. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: Learning Modules, Arguments, Parameters (imma noob)
You've already received a lot of answers and guidance, but here is on more point... On 09/25/2015 12:03 PM, Cody Cox wrote: [snip] this I am not sure about, I set Kilo=get_input(kilo), ... Watch your capitalization! Kilo is _NOT_ the same as kilo. Case is significant in Python (as well as in many other programming languages). Also, as has already been pointed out: what you want here is kilo=get_input(). Along with the corresponding change to the get_input() definition. This function does NOT need a passed parameter. -=- Larry -=- -- https://mail.python.org/mailman/listinfo/python-list
PY3.5 and nnumpy and scipy installation problem
Hi All— I am a beginner in Python and new to this list, but I am an experienced programming in a few other languages. Last year I installed numpy and scipy for Python3.3 on my computer with windows 7, 64 bit OS. Today I downloaded Python3.5, but I the installation for numpy 1.9.2 or 1.9.3 nor scipy 0.16.0 did work on the same computer. Basically the setup for both numpy and scipy did not work. Any ideas are greatly appreciated. Thanks in advance, Sincerely, EKE -- https://mail.python.org/mailman/listinfo/python-list
64 bit python 3.5
Is there a 64 bit version of 3.5 and if so where can I get it. Thanks. -- Bill Strum -- https://mail.python.org/mailman/listinfo/python-list
ANN: python-ldap 2.4.21
Find a new release of python-ldap: http://pypi.python.org/pypi/python-ldap/2.4.21 python-ldap provides an object-oriented API to access LDAP directory servers from Python programs. It mainly wraps the OpenLDAP 2.x libs for that purpose. Additionally it contains modules for other LDAP-related stuff (e.g. processing LDIF, LDAP URLs and LDAPv3 schema). Project's web site: http://www.python-ldap.org/ Checksums: $ md5sum python-ldap-2.4.21.tar.gz 1ce26617e066f412fd5ba95bfba4ba5a $ sha1sum python-ldap-2.4.21.tar.gz 35ed5913d804f14e952bec414c569e140feb889d $ sha256sum python-ldap-2.4.21.tar.gz 2a3ce606465d2d5fbd0a620516b6648ffd85c343d9305d49a2a1f7d338b8bbd4 Ciao, Michael. Released 2.4.21 2015-09-25 Changes since 2.4.20: Lib/ * LDAPObject.read_s() now returns None instead of raising ldap.NO_SUCH_OBJECT in case the search operation returned emtpy result. * ldap.resiter.ResultProcessor.allresults() now takes new key-word argument add_ctrls which is internally passed to LDAPObject.result4() and lets the method also return response control along with the search results. * Added ldap.controls.deref implementing support for dereference control Tests/ * Unit tests for module ldif (thanks to Petr Viktorin) -- Michael Ströder E-Mail: mich...@stroeder.com http://www.stroeder.com -- https://mail.python.org/mailman/listinfo/python-list
Re: PY3.5 and nnumpy and scipy installation problem
Hi Ek, and welcome, My responses below your questions. On Sat, 26 Sep 2015 01:43 pm, Ek Esawi wrote: > Hi All— > > I am a beginner in Python and new to this list, but I am an experienced > programming in a few other languages. > > Last year I installed numpy and scipy for Python3.3 on my computer with > windows 7, 64 bit OS. Today I downloaded Python3.5, but I the installation > for numpy 1.9.2 or 1.9.3 nor scipy 0.16.0 did work on the same computer. > Basically the setup for both numpy and scipy did not work. Any ideas are > greatly appreciated. While we are very knowledgeable, what we don't know is what went wrong. Can you describe what you mean by "did not work"? Preferably, if an error message was printed, please COPY and PASTE (don't retype, especially not from memory) the error message? If some other error occurred (Windows crash, computer caught fire...) please describe it. It may help if you explain the exact commands you used to install. Did you use a text-based installer from the command line, or a GUI? The more information you can give, the better the chances we can help. Regards, -- Steven -- https://mail.python.org/mailman/listinfo/python-list
Re: PY3.5 and nnumpy and scipy installation problem
On 26/09/2015 04:43, Ek Esawi wrote: Hi All— I am a beginner in Python and new to this list, but I am an experienced programming in a few other languages. Last year I installed numpy and scipy for Python3.3 on my computer with windows 7, 64 bit OS. Today I downloaded Python3.5, but I the installation for numpy 1.9.2 or 1.9.3 nor scipy 0.16.0 did work on the same computer. Basically the setup for both numpy and scipy did not work. Any ideas are greatly appreciated. You don't have Visual Studio 2015 installed and so couldn't compile the code from a .tar.gz file or similar? Once again the cavalry comes charging over the hill. http://www.lfd.uci.edu/~gohlke/pythonlibs/#numpy http://www.lfd.uci.edu/~gohlke/pythonlibs/#scipy Gohkle for World Vice President, after the BDFL :) Thanks in advance, Sincerely, EKE -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
Re: 64 bit python 3.5
On 25/09/2015 17:55, Bill Strum wrote: Is there a 64 bit version of 3.5 and if so where can I get it. Thanks. -- Bill Strum https://www.python.org/downloads/release/python-350/ -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
