On Wednesday, June 24, 2015 at 8:17:08 PM UTC-4, Chris Angelico wrote:
> On Thu, Jun 25, 2015 at 9:52 AM, fl wrote:
> > The reason is that list implements __iadd__ like this (except in C, not
> > Python):
> >
> > class List:
> > def __iadd__(self, othe
On Monday, November 30, 2015 at 12:02:57 PM UTC-5, Ian wrote:
> On Mon, Nov 30, 2015 at 10:44 AM, fl wrote:
> > I come across the following code snippet.
> >
> > for i in range(10):
> > def callback():
> > print "clicked button", i
On Monday, November 30, 2015 at 12:37:52 PM UTC-5, Terry Reedy wrote:
> On 11/30/2015 11:44 AM, fl wrote:
>
> > I come across the following code snippet.
>
> > for i in range(10):
> > def callback():
> > print "clicked button", i
&
On Monday, November 30, 2015 at 11:44:44 AM UTC-5, fl wrote:
> Hi,
>
> I come across the following code snippet.
>
>
>
>
>
> for i in range(10):
> def callback():
> print "clicked button", i
> UI.Button("button %s" % i
Hi,
I come across the following code snippet.
for i in range(10):
def callback():
print "clicked button", i
UI.Button("button %s" % i, callback)
The content inside parenthesis in last line is strange to me.
"button %s" % i, callback
That is, the writing looks like reco
Hi,
I read several parts on line about Python that everything in Python is an
object. Yes, it is a key difference with other languages. Then, I read a page
it says variables: global and local variable at:
http://www.tutorialspoint.com/python/python_functions.htm
I have a question that whether
Hi,
When I search around tutorial about None, I came across this link:
http://jaredgrubb.blogspot.ca/2009/04/python-is-none-vs-none.html
I don't understand what use of this class example:
>>> class Zero(): # a class that is zero
...def __nonzero__(self):
... return False
I can onl
Hi,
I see the following from a previous post:
Python 1.5.2 (#1, Aug 27 2012, 09:09:18) [GCC 4.1.2 20080704 (Red Hat
4.1.2-52)] on linux2
Copyright 1991-1995 Stichting Mathematisch Centrum, Amsterdam
>>> import dis
>>> code = compile("(1, 2, 3)", "", "eval")
>>> dis.dis(code)
0 S
Hi,
In the previous exercises, I see list:
cc=[[],[],[]]
Then, I can have this:
ccc=[[[]],[[]],[[]]]
I can also have
ccc[0]
Out[158]: [[]]
ccc[0]='o'
ccc
Out[163]: ['o', [[]], [[]]]
I have question: Is there any difference between [[]] and []?
[[]] can have deeper assignment and use than
On Wednesday, November 18, 2015 at 10:11:24 PM UTC-5, Chris Angelico wrote:
> On Thu, Nov 19, 2015 at 1:55 PM, fl wrote:
> > There are only one time 5 'here' printed out, but there is no 'here' print
> > out in thereafter call sq[2]() etc. How to understand t
Hi,
>From previous post, I get many helpful replies. Now I have a new question
when I run this example code:
-
sq=[]
for xx in range(5):
print 'here'
sq.append(lambda:xx**2)
here
here
here
here
here
xx
Out[150]: 4
sq[2]()
Out[151]: 16
sq[3]()
Out[152]: 16
/
There are
On Wednesday, November 18, 2015 at 7:15:05 PM UTC-5, Chris Angelico wrote:
> On Thu, Nov 19, 2015 at 11:02 AM, Ian Kelly wrote:
> > On Wed, Nov 18, 2015 at 4:22 PM, Chris Angelico wrote:
> >> On Thu, Nov 19, 2015 at 10:14 AM, BartC wrote:
> >>> So, looking at some source code, a default value fo
Hi,
I cannot reason out why the code:
def mpl():
return [lambda x : i * x for i in range(4)]
print [m(2) for m in mpl()]
/
has result:
[6, 6, 6, 6]
I have tried to simplify the above code to an easy understanding form,
but fails. Either the modified code does not work
On Wednesday, November 18, 2015 at 5:38:45 PM UTC-5, fl wrote:
> On Wednesday, November 18, 2015 at 5:12:44 PM UTC-5, Ian wrote:
> > On Wed, Nov 18, 2015 at 2:08 PM, fl wrote:
> > > Hi,
> > >
> > > I have tried the below function and find that it can remember
On Wednesday, November 18, 2015 at 5:12:44 PM UTC-5, Ian wrote:
> On Wed, Nov 18, 2015 at 2:08 PM, fl wrote:
> > Hi,
> >
> > I have tried the below function and find that it can remember the previous
> > setting value to 'val'. I think the second parameter ha
Hi,
I have tried the below function and find that it can remember the previous
setting value to 'val'. I think the second parameter has something on this
effect, but I don't know the name and function of '=[]' in this application.
Could you explain a little to me?
Thanks,
def eList(val, list0=
On Tuesday, November 17, 2015 at 4:03:05 PM UTC-5, John Gordon wrote:
> In fl <@gmail.com>
> writes:
>
> > correctly. Could you see something useful with variable 'sz'?
>
> 'sz' is fewer characters than '(n_iter,)', which may make
Hi,
I find the following code snippet, which is useful in my project:
n_iter = 50
sz = (n_iter,) # size of array
x = -0.37727
z = np.random.normal(x,0.1,size=sz)
Q = 1e-5 # process variance
# allocate space for arrays
xhat=np.zeros(sz)
P=np.zeros(sz)
I learn Python now and t
Hi,
I find the parameters of savefig function has the similar format of that of
main(*argc, **argv) in C. I have tried with savefig("temp.pdf", format='pdf'),
and it works. I get the help content of savefig() as below.
But I cannot understand why they also give:
savefig(fname, dpi=None, facecolor
hi,
When I learn slice, I have a new question on the help file. If I set:
pp=a[0:10:2]
pp is array([1, 3])
I don't know how a[0:10:2] gives array([1, 3]).
I know matlab a lot, but here it seems quite different. Could you tell me
what meaning a[0:10:2] is?
Thanks,
class slice(object)
| s
Hi,
I have read a couple of tutorial on yield. The following code snippet still
gives me a shock. I am told yield is a little like return. I only see one
yield in the tutorial examples. Here it has two yields. And there are three
variables following keyword yield.
I have not tried debug function t
Hi,
When I read the below code, I cannot make the last line (with ##) out.
def res(weights):
n = len(weights)
indices = []
C = [0.] + [sum(weights[:i+1]) for i in range(n)]
u0, j = random(), 0 ##
If I run below code on console, it will say an error.
uu, 0.1, 0
What differe
On Saturday, November 14, 2015 at 8:58:57 PM UTC-5, Chris Angelico wrote:
> On Sun, Nov 15, 2015 at 12:54 PM, fl wrote:
> > I see an example Python code has such a line at the file beginning:
> >
> > #!python
> >
> >
> > Is there some meaning about it?
&g
Hi,
I see an example Python code has such a line at the file beginning:
#!python
Is there some meaning about it?
Thanks,
--
https://mail.python.org/mailman/listinfo/python-list
Hi,
I want to use a code snippet found on-line. It has such content:
from numpy import *
dt = 0.1
# Initialization of state matrices
X = array([[0.0], [0.0], [0.1], [0.1]])
# Measurement matrices
Y = array([[X[0,0] + abs(randn(1)[0])], [X[1,0] + abs(randn(1)[0])]])
When the above content is i
On Saturday, November 14, 2015 at 12:23:50 PM UTC-5, fl wrote:
> Hi,
>
> I follow a tutorial to learn decorator:
>
> http://simeonfranklin.com/blog/2012/jul/1/python-decorators-in-12-steps/
>
> I use Enthought Canopy to run the following code.
> It is really strange t
Hi,
I follow a tutorial to learn decorator:
http://simeonfranklin.com/blog/2012/jul/1/python-decorators-in-12-steps/
I use Enthought Canopy to run the following code.
It is really strange that the wrapper does not take effect.
In fact, I go back to the basic way (not with @):
wrapper(sub(two,
On Saturday, November 14, 2015 at 7:38:09 AM UTC-5, Chris Warrick wrote:
> On 14 November 2015 at 13:13, fl wrote:
> > On Saturday, November 14, 2015 at 7:11:11 AM UTC-5, fl wrote:
> >> Hi,
> >>
> >> I am learning decorator following this link:
> >>
On Saturday, November 14, 2015 at 7:11:11 AM UTC-5, fl wrote:
> Hi,
>
> I am learning decorator following this link:
>
> http://thecodeship.com/patterns/guide-to-python-function-decorators/
>
> When I read decorator on class, I don't see decorator taking in effec
Hi,
I am learning decorator following this link:
http://thecodeship.com/patterns/guide-to-python-function-decorators/
When I read decorator on class, I don't see decorator taking in effect.
In the following code snippet, there is the same print out if I comment out
two lines 'def p_decorate(func
Hi,
I read the following code snippet. A question is here about '@'.
I don't find the answer online yet.
What function is it here?
BTW, below is for printing out?
"""theta = logit^{-1}(a+b)"""
but I don't see it is printed when the following could have been called.
Are you sure it would be
I am using Canopy Express (Free) version. I want to install PyBayes package,
but I don't see it in Package Manager of Canopy. Can I install PyBayes to
Canopy?
Now, Canopy is the default Python on my Windows 7 PC. If Canopy does not allow
to install PyBayes into it, can I install PyBayes to the
Hi,
I follow a web site on learning Python re. I have read the function
description of re.m, as below.
re.MMakes $ match the end of a line (not just the end of the string) and
makes ^ match the start of any line (not just the start of the string).
But I don't see the reason to put re.M in
Hi,
When I try the following, python does not know 'as'. Why doesn't it?
Thanks,
>>> cats = ['Tom', 'Snappy', 'Kitty', 'Jessie', 'Chester']
>>>
>>> type(cats)
>>> cats[2]
'Kitty'
>>> as=cats[2]
SyntaxError: invalid syntax
>>> as=cats
SyntaxError: invalid syntax
>>> as
SyntaxError: invalid syn
On Thursday, November 12, 2015 at 8:58:33 AM UTC-5, fl wrote:
> Hi,
>
> I run a code snippet from link:
> http://www.python-course.eu/inheritance_example.php
>
> It is found that there is an error in this loop:
>
> for i in xrange(1):
> x.tick()
> print(x)
Hi,
I run a code snippet from link:
http://www.python-course.eu/inheritance_example.php
It is found that there is an error in this loop:
for i in xrange(1):
x.tick()
print(x)
SyntaxError: invalid syntax
I have modified it to:
for i in x range(1):
x.tick()
print(x)
SyntaxError:
Hi,
I am learning python. I see a previous post has such code:
>>> data = '"binääridataa"\n'.encode('utf-8')
>>> f = open('roska.txt', 'wb')
>>> f.write(data)
17
>>> f.close()
The .encode methods produced a bytestring, which Python likes to display
as ASCII characters wh
On Thursday, June 25, 2015 at 6:24:07 PM UTC-7, Mark Lawrence wrote:
> On 26/06/2015 02:07, fl wrote:
> > Hi,
> >
> > I read Ned's tutorial on Python. It is very interesting. On its last
> > example, I cannot understand the '_' in:
> >
> >
>
Hi,
I read Ned's tutorial on Python. It is very interesting. On its last
example, I cannot understand the '_' in:
board=[[0]*8 for _ in range(8)]
I know '_' is the precious answer, but it is still unclear what it is
in the above line. Can you explain it to me?
Thanks,
--
https://mail.pyth
Hi,
I read a tutorial on lambda on line. I don't think that I am clear about
the last line in its example code. It gives two parameters (22, 23).
Is 22 for n, and 23 for x? Or, it creates two functions first. Then,
each function gets 22 while the other function gets 23?
Please help me on this i
Hi,
I see a code snippet online:
[1, 2, 3].remove(42)
after I modify it to:
[1, 2, 3].remove(2)
and
aa=[1, 2, 3].remove(2)
I don't know where the result goes. Could you help me on the question?
Thanks,
--
https://mail.python.org/mailman/listinfo/python-list
On Thursday, June 25, 2015 at 8:20:52 AM UTC-7, fl wrote:
> Hi,
>
> I download and install pyPDF2 library online. It says the test can run by:
>
>
> python -m unittest Tests.tests
>
>
> tests.py is under folder PyPDF2-master\Tests\
>
>
> The above c
Hi,
I download and install pyPDF2 library online. It says the test can run by:
python -m unittest Tests.tests
tests.py is under folder PyPDF2-master\Tests\
The above command line does run and give output message, but I don't
understand why it run after I read tests.py:
///
Hi,
I read a blog written by Ned and find it is very interesting, but I am still
unclear it in some parts. In the following example, I am almost lost at the
last line:
nums = num
Could anyone explain it in a more detail to me?
Thanks,
...
The reason is that list imple
On Wednesday, June 24, 2015 at 9:54:12 AM UTC-7, fl wrote:
> Hi,
> I want to learn some coding on PDF. After I download and install pyPDF2,
> it cannot pass unit test, which is coming from the package.
>
> I put a screen shot link here to show the console message:
>
> http:/
On Wednesday, June 24, 2015 at 9:54:12 AM UTC-7, fl wrote:
> Hi,
> I want to learn some coding on PDF. After I download and install pyPDF2,
> it cannot pass unit test, which is coming from the package.
>
> I put a screen shot link here to show the console message:
>
> http:/
On Wednesday, June 24, 2015 at 9:54:12 AM UTC-7, fl wrote:
> Hi,
> I want to learn some coding on PDF. After I download and install pyPDF2,
> it cannot pass unit test, which is coming from the package.
>
> I put a screen shot link here to show the console message:
>
> http:/
Hi,
I want to learn some coding on PDF. After I download and install pyPDF2,
it cannot pass unit test, which is coming from the package.
I put a screen shot link here to show the console message:
http://tinypic.com/view.php?pic=fbdpg0&s=8#.VYre8_lVhBc
[IMG]http://i57.tinypic.com/fbdpg0.png[/IMG]
ta = func(5) --> data = (10,15,... )
>
>
> On Wed, Jun 3, 2015 at 1:57 AM, fl wrote:
> Hi,
>
>
>
> I just see the tutorial says Python can return value in function, it does
>
> not say multiple data results return situation. In C, it is possi
Hi,
I find the following results are interesting, but I don't know the difference
between list() and list.
>>> nums=list()
>>> nums
[]
>>> xx=list
>>> xx
>>> nums
[]
>>> print(xx)
>>> print(nums)
[]
>>>
Could you tell me that?
Thanks,
--
https://mail.python.org/mailman/listinfo/pytho
Hi,
I just see the tutorial says Python can return value in function, it does
not say multiple data results return situation. In C, it is possible.
How about Python on a multiple data return requirement?
Thanks,
--
https://mail.python.org/mailman/listinfo/python-list
On Tuesday, June 2, 2015 at 1:20:40 PM UTC-7, fl wrote:
> Hi,
>
> I try to learn sorted(). With the tutorial example:
>
>
>
>
> >>> ff=sorted({1: 'D', 2: 'B', 3: 'B', 4: 'E', 5: 'A'})
> >>> ff
>
Hi,
I try to learn sorted(). With the tutorial example:
>>> ff=sorted({1: 'D', 2: 'B', 3: 'B', 4: 'E', 5: 'A'})
>>> ff
[1, 2, 3, 4, 5]
I don't see what sorted does in this dictionary, i.e. the sequence of
1..5 is unchanged. Could you explain it to me?
Thanks,
--
https://mail.python.org/
Hi,
I see the description of lambda at the online tutorial, but I cannot
understand it. '42' is transferred to the function. What 'x' value should
be? I do not see it says that it is '0'. And, what is 'x'?
>>> def make_incrementor(n):
... return lambda x: x + n
...
>>> f = make_increm
Hi,
I have a list:
>>> lines
['12', '42', '49', '156', '225', '36', '49', '164', '11181', '3100']
I want to access the last two digits. That is:
['12', '42', '49', '56', '25', '36', '49', '64', '81', '00']
When I try to use lines[3][0] is '1'
lines[3][1] is '5'
lines[3][2] is '6'
I d
Hi,
I just know that '_' is the last result in the Python interpreter. I feel that
it is like 'ans' in Matlab. When I run the following commands. The result of
'_' are always '4'.
Because I have tried several commands, such as reversed('fred'), xx and rx,
'4' are always there.
What is your exp
Hi,
I read the online help about string. It lists string constants, string
formatting, template strings and string functions. After reading these,
I am still puzzled about how to use the string module.
Could you show me a few example about this module?
Thanks
--
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Hi,
I read the online tutorial on iterator:
https://docs.python.org/2/library/itertools.html
I have no idea on how to use this one:
itertools.count(start=0, step=1)
BTW, I am using Python 2.7.9 on Windows 7.
I even input the following:
def count(start=0, step=1):
# count(10) --> 10 11
On Sunday, May 31, 2015 at 9:46:56 PM UTC-7, fl wrote:
> Hi,
>
> When I search solution of reverse a string/number, I came across a short
> function online:
>
> >>> def palindrome(num):
> return str(num) == str(num)[::-1]
>
> I thought that it is a gene
Hi,
When I try the following (They are saved in a main.py file)
#!/usr/bin/python
print r'C:\\nowhere'
It works as the tutorial, i.e. it echoes in a Windows 7
command console:
C:\\nowhere
When I run the following command in a Python 2.7.9 Shell on Windows 7,
print r'C:\\nowhere'
On Sunday, May 31, 2015 at 12:59:47 PM UTC-7, Denis McMahon wrote:
> On Sun, 31 May 2015 12:40:19 -0700, fl wrote:
> reversed returns an iterator, not a list, so it returns the reversed list
> of elements one at a time. You can use list() or create a list from
> reversed and then joi
Hi,
When I search solution of reverse a string/number, I came across a short
function online:
>>> def palindrome(num):
return str(num) == str(num)[::-1]
I thought that it is a general function. And with the following variable:
>>> a
'1234_'
>>> parlindrome(a)
Traceback (most recen
On Sunday, May 31, 2015 at 4:23:19 PM UTC-7, Tim Delaney wrote:
> On 1 June 2015 at 05:40, fl wrote:
> Hi,
>
> The for statement must have a colon at the end of line e.g. a complete for
> statement and block is:
>
> for br in b:
> print br
>
> This will outp
On Sunday, May 31, 2015 at 12:53:19 PM UTC-7, Denis McMahon wrote:
> On Sun, 31 May 2015 11:36:35 -0700, fl wrote:
> > I am new to Python. I would manipulate a string of hex numbers. If the
> > first digit is bigger than 7, the first two digits are required to add
> > 4.
Hi,
I am new to Python. I would manipulate a string of hex numbers. If the first
digit is bigger than 7, the first two digits are required to add 4.
For example, '8022_3345' will be changed to '8422_3345'. The
underscore between two 4-digit's was generated previously (i.e.
it is already in the .
Hi,
I have a string b='1234'. I run: br=reversed(b)
I hope that I can print out '4321' by:
for br in b
but it complains:
SyntaxError: invalid syntax
My questions:
1. What use for reversed(). I do not find an example on web.
2. If reversed() is wrong the my purpose, what method can do it? i.e
Hi,
I once learnt Python for a few weeks. Now, I try to using a Python package
pymc. It has the following example code:
import pymc
import numpy as np
n = 5*np.ones(4,dtype=int)
x = np.array([-.86,-.3,-.05,.73])
alpha = pymc.Normal('alpha',mu=0,tau=.01)
beta = pymc.Normal('beta',mu=0,tau=.01)
On Sunday, March 1, 2015 at 1:25:59 PM UTC-8, Andrea D'Amore wrote:
> On 2015-03-01 20:32:34 +, fl said:
>
> > import numpy
> > it succeeds. On http://wiki.scipy.org/Cookbook, it shows some interesting
> > code example snippet, such as Cookbook / ParticleFilte
Hi,
It is difficult to install numpy package for my PC Windows 7, 64-bit OS. In
the end, I install Enthought Canopy, which is recommended on line because it
does install numpy automatically. Now, I can test it with
import numpy
it succeeds. On http://wiki.scipy.org/Cookbook, it shows some inter
Hi,
I get a post on tuple, see below please, on line. It seems that something is
missing. I want to learn tuple from this example as well.
Could you explain it to me (a tuple % another tuple)?
Thanks,
http://stackoverflow.com/questions/1708510/python-list-vs-tuple-when-to-use-each
In Py
On Friday, July 25, 2014 8:37:14 PM UTC-4, Ian wrote:
> On Fri, Jul 25, 2014 at 5:08 PM, fl wrote:
> > Do you have other ways to import? (I find the above import a little more
> > letters)
>
> What's wrong with:
>
> import numpy
I was wrong, maybe some ca
On Thursday, July 24, 2014 9:49:14 AM UTC-4, Vlastimil Brom wrote:
> 2014-07-24 14:53 GMT+02:00 fl :
> internally):
> http://mpmath.org/
> Using the sensible defaults, the plotting of a function can be as simple as:
>
> mpmath.plot(mpmath.sin)
>
> As for your original
On Friday, July 25, 2014 7:45:31 AM UTC-4, fl wrote:
> to 999 of the target array. Then, I want to use interpolate it from 200 to
> 1000
>
> with interpolate method.
>
> In Python, ':' is used to indicate range (while in Matlab I know it can be
> used
> to con
Hi,
I have an array arr which is indexed from 0 to 999. I would like to construct a
column in two steps. The first step is input from 200 data, evenly spread from 0
to 999 of the target array. Then, I want to use interpolate it from 200 to 1000
with interpolate method.
In Python, ':' is used to
On Thursday, July 24, 2014 10:25:52 AM UTC-4, Marko Rauhamaa wrote:
> #!/usr/bin/env python3
>
> import math
>
> for x in range(0, 361, 15):
>
> print(int((math.sin(x / 180 * math.pi) + 1) * 30 + 0.5) * " " + "*")
>
>
Hi,
I have seen several kinds of module import examples, but most of the programs
are
small and less content. They only have one or two module import.
I'll use the following modules in a small project. I would like to know whether
it is appropriate to put all of them at the file header, like thi
On Thursday, July 24, 2014 1:58:45 PM UTC-4, Chris Angelico wrote:
> On Fri, Jul 25, 2014 at 3:54 AM, fl wrote:
> > @with_setup(my_setup_function, my_teardown_function)
> > def test_numbers_3_4():
> > print 'test_numbers_3_4 < act
On Thursday, July 24, 2014 1:48:02 PM UTC-4, fl wrote:
> On Thursday, July 24, 2014 1:37:49 PM UTC-4, Chris Angelico wrote:
>
> > On Fri, Jul 25, 2014 at 3:33 AM, fl wrote:
>
> Thanks. The source of that snippet is from this link:
>
>
> http://pythontest
On Thursday, July 24, 2014 1:37:49 PM UTC-4, Chris Angelico wrote:
> On Fri, Jul 25, 2014 at 3:33 AM, fl wrote:
> > Hi,
> > I want to write some test code. Some on-line tutorials have such codes:
> >
> >
> > from unnecessary_math import multiply
> Which tut
Hi,
I want to write some test code. Some on-line tutorials have such codes:
from unnecessary_math import multiply
When it runs, it has errors:
>>> from unnecessary_math import multiply
Traceback (most recent call last):
File "", line 1, in
ImportError: No module named unnecessary_math
I hav
Hi,
I have read a lot about Python, but it still has a problem now on a simple
exercise. For example, I want to generate a sine curve. First, I get a time
sequence:
index=range(100)
I import math module, try to calculate sine with
math.sin(index*math.pi/2)
but it fails.
It is possible to use
On Wednesday, July 23, 2014 8:30:00 PM UTC-4, fl wrote:
I have figured it out. It is installed under Cygwin. Although there are some
errors in the process, it works now. Thanks,
--
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Hi,
I download data analysis pandas toolkit (Windows 32 version) to my PC:
pandas-0.14.0.win32-py2.7.exe
After I run it, I still cannot import the module:
>>> import pandas as pd
No module named numpy
Traceback (most recent call last):
File "", line 1, in
File "C:\Python27\lib\site-pack
Hi,
I run the example code below from website:
https://docs.python.org/2/library/repr.html#repr.Repr.repr1
If I run these lines from an editor, it echoes:
>>>
>>> dsfdsf # entered letters
If I only run the last line (hoping the same effect with running from the
editor)
it simply ech
On Tuesday, July 22, 2014 8:27:15 PM UTC-4, Terry Reedy wrote:
> When you call a function, Python binds function parameter names to
> argument objects in the function's local namespace, the same as in name
> assignments. Given
> def f(a, b): pass
> a call f(1, 'x') starts by executing
> a, b = 1,
On Tuesday, July 22, 2014 4:35:33 PM UTC-4, Peter Pearson wrote:
> On Tue, 22 Jul 2014 12:34:51 -0700 (PDT), fl wrote:
> When you say "def reassign(list)", that means "I'm defining a function
> to which the caller will pass one object, and within this function I'
On Tuesday, July 22, 2014 4:46:25 PM UTC-4, emile wrote:
> On 07/22/2014 01:35 PM, Peter Pearson wrote:
> def reassign(mylist): # no reason to shadow the list builtin
> mylist[:] = [0,1]
>
> mylist = [1]
> reassign(mylist)
> mylist
>
> Emile
I have a new question on the code. When I run it
On Tuesday, July 22, 2014 4:46:25 PM UTC-4, emile wrote:
> On 07/22/2014 01:35 PM, Peter Pearson wrote:
> def reassign(mylist): # no reason to shadow the list builtin
> mylist[:] = [0,1]
> mylist = [1]
> reassign(mylist)
> mylist
> Emile
Thanks for your example. I do not find the explanation
On Tuesday, July 22, 2014 5:51:07 PM UTC-4, emile wrote:
> On 07/22/2014 02:42 PM, fl wrote:
> pprint is a module name -- you need to invoke the pprint function from
> within the pprint module:
> pprint.pprint(board)
Thanks. I am curious about the two pprint. Is it the first pprint
Hi,
I read web tutorial at:
http://nedbatchelder.com/blog/201308/names_and_values_making_a_game_board.html
I enter the example lines of that website:
import pprint
board = [ [0]*8 ] * 8
pprint(board)
It echos error with Python 2.7:
Traceback (most recent call last):
File "C:\Python27\Lib
On Tuesday, July 22, 2014 3:32:19 PM UTC-4, Ned Batchelder wrote:
> On 7/22/14 3:04 PM, fl wrote:
> it is here: http://nedbatchelder.com/text/names.html
> > When I enter the command lines on my computer:
> I recommend putting the code into a .py file, and
> running it all at
On Tuesday, July 22, 2014 3:04:09 PM UTC-4, fl wrote:
Hi,
Excuse me. I find that the OP misses some info. I rewrite it again:
I learn Python function call on tutorial. There is a link on this subject.
http://robertheaton.com/2014/02/09/pythons-pass-by-object-reference-as-explained-by-philip-k
Hi,
I learn Python function call on tutorial. There is a link on this subject.
http://robertheaton.com/2014/02/09/pythons-pass-by-object-reference-as-explained-by-philip-k-dick/
Although it explains clearly, the figure makes me puzzled.
""Python is different. As we know, in Python, "Object refere
Hi,
I learn string constant on Python tutorial at:
https://docs.python.org/2/library/string.html
Although it gives explanation, it does not show me any example usage.
Could you give me an example on using these options?
string.digits
string.ascii_letters
Thanks,
--
https://mail.python.or
On Monday, July 21, 2014 4:26:25 PM UTC-4, Tim Chase wrote:
> On 2014-07-21 13:14, fl wrote:
> You don't specify *what* is wrong or what constitutes "does not
> work". If you provide an example of what you *do* want, folks here
> can help you get closer to the code you
Hi,
I see the following example on line, but it does not work. I do not know what is
wrong. Could you correct it for me?
Thanks,
I'm not sure what [1, 1, 0, 0, 0, 0, ...] has to do with 128, but if you want
the
base 10 digits:
>>> a = 1234
>>> [int(d) for d in str(
Hi,
It is still in the Regular expression operations concept, this link:
has example using single quote mark: '
https://docs.python.org/2/library/re.html#re.split
While in this link:
https://docs.python.org/3/howto/regex.html
It gives table with quote: "
Regular String Raw string
"ab*"
Hi,
This example is from the link:
https://wiki.python.org/moin/RegularExpression
I have thought about it quite a while without a clue yet. I notice that it uses
double quote ", in contrast to ' which I see more often until now.
It looks very complicated to me. Could you simplified it to a simp
On Thursday, July 10, 2014 10:14:14 AM UTC-4, Chris "Kwpolska" Warrick wrote:
> >
>
>
> Please don't learn from this link. It's from 2001. You should learn
>
> from modern documentation: https://docs.python.org/ (if not running
>
> 3.4.x, change the version in the top)
>
>
>
> You also sho
Hi,
For me, it is difficult to understand the last line of the paragraph below in
parenthesis (A ``quote'' is the character used to open the string,
i.e. either ' or ".)
It talks about triple-quoted strings. Where is ``quote'' from? It has two ` and
'.
What this different ` and ' do for here?
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