FINAL.py

#GROCERY STORE MANAGEMENT
#shaily mandal 12a1
from datetime import datetime
now = datetime.now()

def setting():
	print("Choose an Option:")
	print("1). Edit Shop Name")
	print ("2). Delete Products")
	print("3). Back")
	choice = input()
	if choice == "1":
		print ("Enter Shop Name:")
		file = open("name1.txt","w+")
		file.write(input())
		file.close()
		print("Shop Name Changed!"+ "\n")
	elif choice == "2":
		print("Enter Product Code to be deleted: ")
		file = open("p_list","r")
		x = file.readlines()
		file.close()
		file = open("p_list","w+")
		new = []
		sk = input()
		for i in x:
			if sk.upper() != i.strip():
				new.append(i)
		file.writelines(new)
		file.close()
		print("Deleted Successfully!")
		if choice == "3":
			return
def invoice():
	c = open ("invoice#.txt", "a")
	c.close()
	f = open("p_list","r")
	p_list = f.readlines()
	p1 = []
	for i in p_list:
		p1.append(strip(i))
	c = open("invoice#.txt","r")
	x = c.read()
	c.close()
	c = open("invoice#.txt","w")
	if len(x) == 0:
		c.write("1")
		counter = 1
	else:
		counter = int(x)
		counter = counter + 1
		c.write(str(counter))
	c.close()
	
	timee = now.strftime("%Y-%m-%d %H:%M:%S")
	#timee = strip(tim)
	file = open("name1.txt")
	name = file.read().upper()
	namep= ""
	for i in name :
		namep += i
		namep += " "
	ly = []
	ny = []
	a = 1
	print("Available Product Codes : ",end="")
	print()
	m = 0
	for i in p1:
		m = m+1
		if m == len(p1):
			print (i)
		else:
			print(i,end=" ")
	while a ==1:
		print("Enter Product code:",end=" ")
		p = input()
		if p.upper() not in p1:
			print ("No Such Product Found!" + " Please Try Again")
			pass
		ly.append(p.upper())
		print("Quantity:")
		while True:
			try:
				c = float((input()))
				ny.append(c)
				break
			except:
				print("Quantity can only be Integer or Float! Please Add Again")
		print ("Enter 1 to Stop adding product or press any other key to add more")
		if input() == "1":
			print ("Enter Discount(in %)")
			dis = float(input())
			break
	p_list = []
	for i in range (len(ly)):
		p_list.append(ly[i])
	maxi = 0
	s_list = []
	a_list = []
	for i in p_list:
		x =""
		for j in range (0,len(i)):
			x = x + i[j]
		file = open(x+".txt")
		file.readline()
		s_list.append(len(file.readline()))
		a_list.append(x)
		file.close()
	x = open("invoice.txt","w+")
	if max(s_list) < 12:
		maxi = 12
	else:
		maxi = max(s_list)
	l = " " + "S.no" + " "*2+ "Product Name" + " "*(maxi-10) + "Price" + " "*4 + "GST(%)" + " "*2 +"Quantity" + "  "+ "Total"+" "
	f = len(l)
	z = int((f - len(namep))/2)
	v = int((f - len("INVOICE"))/2)
	w = int((f - len(timee))/2)
	s = int((f - 9 - len(str(counter)))/2)
	j = " "*z
	x.write(j)
	x.write(namep+"\n")
	x.write (" "*v + "INVOICE" + "\n"*2)
	x.write(" "*w + timee + "\n")
	x.write(" "*s + "Invoice#" + " " + str(counter)+"\n"*3)
	x.write((" " + "S.no" + " "*2+ "Product Name" + " "*(maxi-10) + "Price" + " "*4 + "GST(%)" + " "*2 +"Quantity" + "  "+ "Total"+" ")+"\n"+"\n")
	t = 0
	disc = 0
	for i in p_list:
		t = t+1
		s_no = t
		code = i
		file = open(i+".txt","r")
		code = strip(file.readline())
		name = strip(file.readline())
		price = int(strip(file.readline()))
		gst = int(strip(file.read()))
		qt = (ny[t-1])
		x.write((" " + str(s_no) + ")." + " "*(4-len(str(s_no))) + name + " "*(maxi +2-len(name)) + str(price) + " "*(9-len(str(price))) + str(gst) + " "* (8-len(str(gst))) + str(qt) + " "* (10 - len(str(qt))) + str(round((price*float(qt)+price*gst*int(qt)/100),2)) + "\n"))
		dc = price*float(qt)+price*gst*float(qt)/100
		disc = disc + dc
	d = disc*dis*0.01
	x.write("\n")
	x.write(" "*len(" " + "S.no" + " "*2+ "Product Name" + " "*(maxi-10) + "Price" + " "*4 + "GST(%)" + " ") +" "+ "Discount:" + " " + str(round(d,2))+"\n")
	x.write(" "*len(" " + "S.no" + " "*2+ "Product Name" + " "*(maxi-10) + "Price" + " "*4 + "GST(%)" + " ") +" "+ "Net Payable:" + " " + str(round(disc-d,2))+"\n"*4)
	x.write ("*. This is a Computer Generated Invoice and does not require Signature."+"\n")
	x.write("*. Return/Replacement is not allowed under any circumstances."+"\n")
	x.write("\n"+"Thanks for shopping with us")
	file.close()
	x.close()
	print ("Invoice Saved Successfully in Invoice.txt at Desktop.")
	print("Net Payable : ",round((disc-d),2))
	print("Press Any Key to continue!")
	input()
def strip(a):
	x = ""
	for i in range(0,len(a)-1):
			x = x + a[i]
	return(x)
def add():
	name = input("Enter name of Product: ")
	while(True):
		try:
			s = int(input("Enter Selling Price(Excluding GST): "))
			g = int(input("Enter GST (in %): "))
			n1 = input("Choose a Product code(Any alphanumeric character(Except spaces) to be used for Product Indentification): ")
			le = open("p_list","r")
			if n1.upper()+"\n" in le.readlines():
				print("Product Already Exist!")
				le.close()
				return
			break
		except:
			print("Only Numerical Values are allowed in Selling Price and GST")
	f_name = n1.upper()+".txt"
	file = open(f_name,"w+")
	w = n1.upper() + "\n" + name + "\n" + str(s) + "\n"+ str(g) + "\n"
	file.write(w)
	file.close()
	file = open("p_list","a+")
	file.write(n1.upper()+"\n")
	file.close()
	print("")
	print("Product added Successfully!")
	print("")
	print ("Press any key to Continue to Main Menu")
	if (len(input())!= 0):
		return
def view():
	maxi = 0
	file = open("p_list","r")
	if len(file.read()) == 0:
		print("Product List Empty!")
		print("Press any key to continue!")
		input()
		return
	file.close()
	file = open("p_list","r")
	p_list = file.readlines()
	s_list = []
	a_list = []
	for i in p_list:
		x = ""
		for j in range (0,len(i)-1):
			x = x + i[j]
		file = open(x+".txt")
		file.readline()
		s_list.append(len(file.readline()))
		a_list.append(x)
		file.close()
	if max(s_list) < 12:
		maxi = 12
	else:
		maxi = max(s_list)
	print(" " + "S.no" + " "*2+ "Product Name" + " "*(maxi-10) + "Price" + " "*4 + "GST(%)" + " "*2 + "Product Code"+" ")
	t = 0
	for i in a_list:
		t = t+1
		s_no = t
		code = i
		file = open(i+".txt","r")
		code = strip(file.readline())
		name = strip(file.readline())
		price = strip(file.readline())
		gst = strip(file.read())
		print(" " + str(s_no)  + ")." + " "*(4-len(str(s_no))) + name + " "*(maxi +2-len(name)) + price + " "*(9-len(str(price))) + gst ,end="")
		g = 8 - len(str(gst))
		print(" "*g + code)
	print("")
	print ("Press any key to Continue to Main Menu")
	if (len(input())!= 0):
		return
while True:
	file = open("p_list","a+")
	file.close()
	file = open("name1.txt","a")
	file.close()
	file = open("name1.txt","r")
	s = file.read()
	file.close()
	if len(s) == 0:
		s_name = str(input("Enter name of Shop :"))
		file = open("name1.txt","w")
		file.write(s_name)
		file.close()
	file = open("name1.txt","r")
	k = file.read()
	j = "  "
	for i in k:
		j = j+i
		j = j + "  "
	print("\t\t| GROCERY STORE MANAGEMENT |")
	print("\t\t____________________________")
	print()
	print("\t\t| OWNER:SHAILY MANDAL |")
	print("\t\t_______________________")
	print()
	print()
	print ("|"+j.upper()+"|")
	for i in range (2):
		print("")
	print("Select an Option:")
	print("1). Generate Invoice")
	print("2). Add a new Product")
	print ("3). Veiw all the Products")
	print ("4). view the Settings")
	print ("5). Exit")
	print("")
	while(True):
		try:
			choice = int(input("Your Choice : "))
			break
		except:
			print("Choose correct Option! ")
	if choice ==2:
		add()
	elif choice == 3:
		view()
	elif choice == 1:
		invoice()
	elif choice == 5:
		print ("Program Closed!")
		break
	elif choice == 4:
		setting()
	else:
		print("Choose Correct Option!"+"\n")