MechCoder

'''Thermo

A python module used to retrieve information about various other properties of steam , when either temperature , pressure and one of enthalpy , entropy , specific volume and quality are given .

Author = S.Manoj Kumar

'''

MechCoder

import gtk
import thermo

class SteamSolver:
    def __init__(self):
        '''Initial window which has a combo box from which the user can choose either of     temperature and pressure''' 


        
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)

MechCoder

import sys

from PyQt4 import QtGui , QtCore
import time

class Hangman(QtGui.QWidget):
 
    def __init__(self):
        super(Hangman , self).__init__()
        self.window()

MechCoder

import urllib2
import re

html = urllib2.urlopen('http://12000.org/my_notes/kamek/KERNEL/index.htm', 'r')
html = html.readlines()
ode = open('ode.txt', 'w')
for line in html:
    if line.startswith('<PRE'):
        index = html.index(line)
        ode.write(html[index + 2])

MechCoder

import time
import gtk
import threading
import gobject 
gtk.gdk.threads_init()

class main():
    def __init__(self):       
        self.window = gtk.Window(gtk.WINDOW_TOPLEVEL)
        self.window.set_title('Stopwatch')

MechCoder

chi = Function('chi')(x, y)
chix = chi.diff(x)
chiy = chi.diff(y)
cpde = chix + h*chiy - hy*chi
chieq = Symbol("chi")
for i in range(1, deg + 1):
    chieq += Add(*[
        Symbol("chi_" + str(power) + "_" + str(i - power))*x**power*y**(i - power)
        for power in range(i + 1)])
        cnum, cden = cancel(chieq.diff(x) + h*chieq.diff(y)

MechCoder

[x*cos(y)**2, cos(y), 1/(x*log(x)*sin(y)), sin(y), x*sin(y)*cos(y), -1/(x**2*log(x)*sin(y)) - 1/(x**2*log(x)**2*sin(y)), cos(y)/(x*log(x)*sin(y)**2), cos(y)**2, x**2*cos(y)**4, cos(y)**2/(x**2*log(x)**2*sin(y)**4), 1/(x**4*log(x)**2*sin(y)**2) + 2/(x**4*log(x)**3*sin(y)**2) + 1/(x**4*log(x)**4*sin(y)**2), 1/(x**2*log(x)**2*sin(y)**2), cos(y)**4, x**2*sin(y)**2*cos(y)**2, sin(y)**2, x**2*sin(y)*cos(y)**3, cos(y)/(x*log(x)*sin(y)), -1/(x**2*log(x)) - 1/(x**2*log(x)**2), x*sin(y)**2*cos(y), cos(y)/log(x), cos(y)**3/(x*log(x)*sin(y)**2), cos(y)**3, cos(y)/(x**2*log(x)**2*sin(y)**3), x*sin(y)*cos(y)**3, -cos(y)**2/(x**2*log(x)*sin(y)) - cos(y)**2/(x**2*log(x)**2*sin(y)), -cos(y)**2/(x*log(x)*sin(y)) - cos(y)**2/(x*log(x)**2*sin(y)), x*cos(y)**4, cos(y)**2/(x*log(x)*sin(y)**2), cos(y)**2/(log(x)*sin(y)), x*cos(y)**3, -cos(y)/(x**2*log(x)*sin(y)) - cos(y)/(x**2*log(x)**2*sin(y)), -1/(x**3*log(x)**2*sin(y)**2) - 1/(x**3*log(x)**3*sin(y)**2), cos(y)**3/(log(x)*sin(y)**2), -cos(y)/(x*log(x)) - cos(y)/(x*log(x)**2), sin

MechCoder

    C = S(0)
    A = simplify(hx.diff(y)
    if A:
        B = simplify(hy.diff(y) + hy**2)
        if B: 
            C = simplify(hx.diff(x) - hx**2)

    if C:
        Ax = A.diff(x)
        Ay = A.diff(y)

MechCoder

                 ⎛     ⌠                                  ⎞          
                 ⎜     ⎮     2                            ⎟          
                 ⎜     ⎮    b ⋅(a⋅F(a⋅x + b⋅y) - b)       ⎟ ⎛ 2    2⎞
-b⋅(a⋅y - b⋅x) + ⎜C₁ - ⎮ ────────────────────────────── dr⎟⋅⎝a  + b ⎠
                 ⎜     ⎮                      ⎛ 2    2⎞   ⎟          
                 ⎜     ⎮ (a + b⋅F(a⋅x + b⋅y))⋅⎝a  + b ⎠   ⎟          
                 ⎝     ⌡                                  ⎠          
─────────────────────────────────────────────────────────────────────
                                2    2                               
                               a  + b                                

MechCoder

Indefinite integrals:

1. If old is an integration variable, and new is a Symbol that is not present in expr, then expr.subs({old: new}), should xreplace old with new.

Example:

expr = Integral(f(x), x)
expr.subs(x, y) // should give
⌠        
⎮ f(y) dy