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symtex.py
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symtex.py
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# symtex (symtex.py)
# Copyright 2018 Omkar H. Ramachandran
# This project is licensed under GPL Version 3. For more information on what
# the license entails, refer to the COPYING file in the root directory of the
# project or head over to <www.gnu.org/licenses>
#
# Omkar H. Ramachandran
# omkar.ramachandran@colorado.edu
#
# Aidan Bohenick
# aidan.bohenick@colorado.edu
#
# Anthony Tracy
# anthony.tracy@colorado.edu
#
# Kellie Gadeken
# kgadeken7@gmail.com
#
# SymTex Source
#
from sympy import *
import numpy as np
import sys
import re
latex_input = sys.argv[1]
flag = 0
str_command = ""
str_input = ""
variable_dict = []
buffer_input = ""
variables = ""
offset = 0
count = 0
count_var = 0
i = 0
latex_input = re.sub(r'\}\{', ')/(', latex_input)
latex_input = re.sub(r'[\{]', '(', latex_input)
latex_input = re.sub(r'[\}]', ')', latex_input)
for j in range(i,len(latex_input)-1):
if(latex_input[j] == 'd' and latex_input[j+1] != ')'):
buffer_var = ""
if(latex_input[j+1] == '\\'):
k = j+2
while(latex_input[k] != '\\' and latex_input[k] != ')' and latex_input[k] != ' ' and k != len(latex_input)-1):
buffer_var += latex_input[k]
k = k+1
if(count_var == 0 and buffer_var != "group" and buffer_var != "endgroup"):
variables += buffer_var
variable_dict.append([latex_input[j+1:k],buffer_var])
count_var += 1
elif(buffer_var != "group" and buffer_var != "endgroup"):
variables += " "+buffer_var
variable_dict.append([latex_input[j+1:k],buffer_var])
count_var += 1
elif(latex_input[j+1] == ')' or latex_input[j+1] == '^'):
continue
# print("Here",latex_input[j],latex_input[j+1],buffer_var)
else:
k = j+1
while(latex_input[k] != '\\' and latex_input[k] != ')' and latex_input[k] != ' ' and k != len(latex_input)-1):
buffer_var += latex_input[k]
k = k+1
if(count_var == 0 and buffer_var != "group" and buffer_var != "endgroup"):
variables += buffer_var
variable_dict.append([latex_input[j+1:k],buffer_var])
count_var += 1
elif(buffer_var != "group" and buffer_var != "endgroup"):
variables += " "+buffer_var
variable_dict.append([latex_input[j+1:k],buffer_var])
count_var += 1
# Command String
flag = 0
while(i < len(latex_input)-1):
if(latex_input[i] != '(' and flag==0):
str_command += latex_input[i]
if(str_command == "frac"):
str_command = "diff"
j = i
N = ""
while(latex_input[j] != ')'):
N += latex_input[j]
j += 1
j += 1
if(latex_input[j] == '('):
j += 1
while(latex_input[j] != ')'):
j += 1
i = j
flag = 1
if(latex_input[i] == '('):
i = i+1
break
i = i+1
# Variable sweep
# Use some Regex magic to get the input string to the format we want
str_input = latex_input[i:-1]
latex_input = re.sub(r'[\\](\w)', '\1', latex_input)
#for i in range(len(variable_dict)):
# str_input = re.sub(r'[^]%s' % variable_dict[i][0],'[^]%s' % variable_dict[i][1],str_input)
for i in range(len(variable_dict)):
str_input = re.sub(r'%s' % variable_dict[i][0],'%s' % variable_dict[i][1],str_input)
# Get rid of the dx/dy
for i in range(len(variable_dict)):
str_input = re.sub(r'd%s' % variable_dict[i][1],'',str_input)
if(len(variable_dict) > 1):
for i in range(len(variable_dict)):
for j in range(i,len(variable_dict)):
str_input = re.sub(r'%s %s' % (variable_dict[0][1], variable_dict[1][1]),'%s*%s' % (variable_dict[0][1],variable_dict[1][1]),str_input)
str_input = re.sub(r'%s%s' % (variable_dict[0][1], variable_dict[1][1]),'%s*%s' % (variable_dict[0][1],variable_dict[1][1]),str_input)
for i in range(len(variable_dict)):
str_input = re.sub(r'(\w) %s' % variable_dict[i][1],r'\1*%s' % variable_dict[i][1],str_input)
str_input = re.sub(r'%s (\w)' % variable_dict[i][1],r'%s*\1' % variable_dict[i][1],str_input)
str_input = re.sub(r'[)] %s'%variable_dict[i][1],r')*%s'% variable_dict[i][1],str_input)
str_input = re.sub(r'%s [(]'%variable_dict[i][1],r'%s*('% variable_dict[i][1],str_input)
str_input = re.sub(r'[)] (\w)',r')*\1',str_input)
str_input = re.sub(r'[)] (\W)',r')*\1',str_input)
str_input = re.sub(r'(\w) (\w)',r'\1*\2',str_input)
str_input = re.sub(r'(\w)[)] [(](\w)',r'\1[)]*[(]\2',str_input)
# Get rid of the annoying frac symbols
str_input = re.sub(r'frac[\(]','(',str_input)
#print(str_input)
commands = ['abs','frac','sin','cos','tan','exp','log','Ei','Si','arcsin','asin','acos','atan','acot','asec','acsc','sqrt']
str_input = re.sub(r' ','',str_input)
if(str_input == ""):
str_input = "1"
x = symbols(variables)
#print(str_command)
#print(variables)
#print(str(latex(integrate(str_input,x))))
#print("\""+str_command+"\"","\"intop\"")
if(str_command == "intop" or str_command == "intop " or str_command == "int"):
print(latex(integrate(str_input,x)))
elif(str_command == "diff"):
print(latex(diff(str_input,x)))