From b989dd484b9f203750fe70dd093fc8acc3ceaca8 Mon Sep 17 00:00:00 2001
From: Sonal <sonal.nipane@gmail.com>
Date: Fri, 2 Oct 2020 21:34:57 +0530
Subject: [PATCH] generates truth-table from boolean expression

---
 Python_GUI_tkinter/table.py | 155 ++++++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 Python_GUI_tkinter/table.py

diff --git a/Python_GUI_tkinter/table.py b/Python_GUI_tkinter/table.py
new file mode 100644
index 0000000..11f3c43
--- /dev/null
+++ b/Python_GUI_tkinter/table.py
@@ -0,0 +1,155 @@
+#To run this program
+#Call gen_truth_table(exp) where exp='((a+b).c)'
+#exp = any valid boolean expression with no. of variables=2 or 3 or 4 only
+
+
+from tkinter import *
+  
+lst=[]
+class Table:
+	def __init__(self,root,total_rows,total_columns): 
+		print(lst)        
+		print('sssssssssssssssss')
+		print(total_rows)
+			# code for creating table 
+		for i in range(total_rows): 
+			for j in range(total_columns):
+				self.e = Entry(root, width=15, fg='black', font=('Arial',16,'bold'))
+				self.e.grid(row=i, column=j)
+				self.e.insert(END, lst[i][j]) 
+
+def findOpenParen(text, closePos):
+	print(closePos)
+	openPos = closePos
+	counter = 1
+	while counter > 0:
+		openPos-=1
+		c = text[openPos]
+		if(c == '('):
+			counter-=1
+		elif(c == ')'):
+			counter+=1
+	return openPos;
+
+
+def f(a,b,c,s):
+	print('sss',s)
+	return s
+
+def truth_table_2(s):
+	table = {}
+	for a in [0, 1]:
+		for b in [0, 1]:
+			lst.insert(len(lst)-1,(a,b,eval(s)))
+			table[(a, b)] =  eval(s)
+	return table
+
+
+def truth_table_3(s):
+	table = {}
+	for a in [0, 1]:
+		for b in [0, 1]:
+			for c in [0,1]:
+				lst.insert(len(lst)-1,(a,b,c,eval(s)))
+				table[(a, b, c)] =  eval(s)
+	return table
+
+
+def truth_table_4(s):
+	table = {}
+	for a in [0, 1]:
+		for b in [0, 1]:
+			for c in [0,1]:
+				for d in [0,1]:
+					lst.insert(len(lst)-1,(a,b,c,d,eval(s)))
+					table[(a, b, c, d)] =  eval(s)
+	return table
+
+
+def gen_truth_table(exp):
+
+	s=""
+	lst.clear()
+	print(exp)
+	print(type(exp))
+	for i in range(len(exp)):
+		if(exp[i]=='.'):
+			s+=" and "
+		elif(exp[i]=='+'):
+			s+=" or "	
+		else:
+			s+=exp[i]
+
+	print(s)
+
+		
+	for i in range(len(s)):
+		#print(i)
+		if(s[i]=='\''):
+			pos=i-1
+			#print(pos)
+			p=findOpenParen(s,pos)
+			
+			s1=s[0:p]
+			s2="not"
+			s3=s[p:i]
+			s4=s[(i+1):len(s)]
+			s=s1+s2+s3+s4
+			
+			
+	print(s)
+
+	for i in range(len(s)):
+		#print(i)
+		if(s[i]=='\''):
+			pos=i-1
+			#print(pos)
+			p=findOpenParen(s,pos)
+			
+			s1=s[0:p]
+			s2="not"
+			s3=s[p:i]
+			s4=s[(i+1):len(s)]
+			s=s1+s2+s3+s4
+			
+			
+	print(s)
+
+
+	p=[]
+
+	for i in range(len(exp)):
+		if(exp[i]>='a' and exp[i]<='z'):
+			p.append(exp[i])
+
+	if(len(p)==3):
+		truth_table_3(s)
+		lst.insert(0,(p[0],p[1],p[2],'X='+exp))
+	elif(len(p)==2):
+		truth_table_2(s)
+		lst.insert(0,(p[0],p[1],'X='+exp))
+	elif(len(p)==4):
+		truth_table_4(s)
+		lst.insert(0,(p[0],p[1],p[2],p[3],'X='+exp))
+
+
+
+	total_rows = len(lst)
+	print(total_rows) 
+	total_columns = len(lst[0]) 
+	print(total_columns)
+	print('*************************')
+	print(lst)
+	# create root window 
+	s_table = Tk()
+	s_table.title("Truth Table")
+	t = Table(s_table,total_rows,total_columns) 
+	s_table.mainloop()
+
+	return lst
+	
+#Example
+gen_truth_table('((a+b).c)')
+
+
+    
\ No newline at end of file