newbie: installing setuptools

[Surbhi Gupta]

Hey, I am new to python and facing problem with installing packages. I am using 
VPython which requires Python 2.7.x from python.org; it will not work with 
versions of Python other than the one from python.org. So I need to install 
packages separately. 

I was trying to install scipy-0.14.0, it gives following error:
Warning (from warnings module):
  File "C:\Python27\lib\distutils\dist.py", line 267
warnings.warn(msg)
UserWarning: Unknown distribution option: 'test_suite'

So I thought maybe I need to install setuptools first. I ran setup.py file in 
IDLE. it runs fine and then I can import it in current session. But when I run 
session, it still says 'no module named setuptools'. Same thing happened when I 
tried to install nose.

  
 
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Re: newbie: installing setuptools

[Surbhi Gupta]

On Friday, December 19, 2014 10:13:15 AM UTC+5:30, Surbhi Gupta wrote:
> Hey, I am new to python and facing problem with installing packages. I am 
> using VPython which requires Python 2.7.x from python.org; it will not work 
> with versions of Python other than the one from python.org. So I need to 
> install packages separately. 
> 
> I was trying to install scipy-0.14.0, it gives following error:
> Warning (from warnings module):
>   File "C:\Python27\lib\distutils\dist.py", line 267
> warnings.warn(msg)
> UserWarning: Unknown distribution option: 'test_suite'
> 
> So I thought maybe I need to install setuptools first. I ran setup.py file in 
> IDLE. it runs fine and then I can import it in current session. But when I 
> run session, it still says 'no module named setuptools'. Same thing happened 
> when I tried to install nose.

OK, the problem is now resolved: I just found out that we need to install from 
prompt instead of IDLE. 
Setuptools is installed, but I am not able to use easy_install from prompt. It 
says:
easy_install : The term 'easy_install' is not recognized as the name of a 
cmdlet, function, script file, or operable
program. Check the spelling of the name, or if a path was included, verify that 
the path is correct and try again.
At line:1 char:1
+ easy_install
+ 
+ CategoryInfo  : ObjectNotFound: (easy_install:String) [], 
CommandNotFoundException
+ FullyQualifiedErrorId : CommandNotFoundException

still unsuccessful in installing Scipy.
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Debug (sympy-Function; lambdify)

[Surbhi Gupta]

This is the code I m trying to run:

from sympy import *
import numpy as np
from sympy import symbols

def deriv(x,t):
a = array(x)
for i in range(0,len(x)):
temp = x[i]
a[i] = temp[0].diff(t)
return a

def matrixmult (A, B):
C = [[0 for row in range(len(A))] for col in range(len(B[0]))]
for i in range(len(A)):
for j in range(len(B[0])):
for k in range(len(B)):
C[i][j] += A[i][k]*B[k][j]
return C

l1,l2,m1,m2,t = symbols('l1,l2,m1,m2,t')
g = 10

th1 = Function('th1')(t)
th2 = Function('th2')(t)
th1dot = Derivative(th1, t)
th2dot = Derivative(th2, t)

x1 = array([[l1*sin(th1)], [-l1*cos(th1)]])
x2 = x1 + array([[l2*sin(th1 + th2)], [-l2*cos(th1 + th2)]])
x1dot = deriv(x1, t)
x2dot = x1dot + deriv(x2, t)

temp1 = matrixmult(x1dot.T,x1dot)
temp2 = matrixmult(x2dot.T, x2dot)
kin = (1/2.0)*m1*temp1[0][0] + (1/2.0)*m2*temp2[0][0]
pot = -m1*g*l1*cos(th1) -m2*g*(l1*cos(th1) + l2*cos(th1+th2))
L = kin - pot
 
e = lambdify((t, l1, l2, m1, m2, th1, th2), L)


all other commands of above code run with no error. but as soon as I give last 
command (the lambdify 1) I get a syntax error. I think that is because I m 
using th1 and th2 as Function of t. Can anyone help me on how to solve this?
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