Merge pull request avinashkranjan#907 from Avishake007/todolist

Added Todolist Cli-Version

Author: avinashkranjan

TODO (CLI-VER)/README.md

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+
+<h1 align="center">Todo List CLI-VER</h1>
+List down your items in a Todolist so that you don't forget
+
+---------------------------------------------------------------------
+
+
+
+## How it works
+- If you don't have todolist.txt file in the current folder it will create one for you  
+- You can add items to the list
+- You can delete items from the list
+- You can update items in the list
+- You can display Items as well
+
+#### By [Avishake Maji](https://github.com/Avishake007) 

TODO (CLI-VER)/todolist.py

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+#Check for the existence of file
+no_of_items=0
+try:
+    f=open("./TODO (CLI-VER)/todolist.txt")
+    p=0
+    for i in f.readlines():#Counting the number of items if the file exists already 
+        p+=1
+    no_of_items=p-2
+except:
+    f=open("./TODO (CLI-VER)/todolist.txt",'w')
+    f.write("_________TODO LIST__________\n")
+    f.write("    TIME                   WORK")
+finally:
+    f.close()
+#Todo list
+print("Press 1: Add Item \nPress 2: Delete Item \nPress 3: Update item \nPress 4: Display Items\nPress 5: Exit")
+n=int(input())
+while n==1 or n==2 or n==3 or n==4:
+    if n==1:
+        todo=[]
+        print("Enter the time in HH:MM format(24 hours format)")
+        time=input()
+        print("Enter your Work")
+        work=input()
+        no_of_items+=1
+        with open('./TODO (CLI-VER)/todolist.txt','a') as f:
+            f.write("\n"+str(no_of_items)+"    "+time+"                   "+work)
+    elif n==2:
+        if(no_of_items<=0):
+            print("There is no item in the list kindly add some items")
+        else:
+            print("____________________________________________________________")
+            print("Your Current List: ")
+            todo=[]
+            with open('./TODO (CLI-VER)/todolist.txt') as f:
+                for i in f.readlines():
+                    print(i)
+                    todo.append(i)
+            print("____________________________________________________________")
+            print("Enter the position of the item you want to delete : ")
+            pos=int(input())
+            if(pos<=0):
+                print("Please enter a valid position")
+            elif (pos>(no_of_items)):
+                print("Please enter the position <= {}".format(no_of_items))
+            else:
+               
+                todo.pop(pos+1)
+                no_of_items-=1
+                if(no_of_items<=0):
+                    print("Congratulations your todo list is empty!")
+
+                with open('./TODO (CLI-VER)/todolist.txt','w') as f:
+                    for i in range(len(todo)):
+                        if i>=(pos+1):
+                            f.write(str(pos)+todo[i][1:])
+                            pos+=1
+                        else:
+                            f.write(todo[i])
+
+    elif n==3:
+        print("____________________________________________________________")
+        print("Your Current List: ")
+        todo=[]
+        with open('./TODO (CLI-VER)/todolist.txt') as f:
+            for i in f.readlines():
+                print(i)
+                todo.append(i)
+        print("____________________________________________________________")
+        print("Enter the position of the items you want to update : ")
+        pos=int(input())
+        if(pos<=0):
+            print("Please enter a valid position")
+        elif (pos>(no_of_items)):
+            print("Please enter the position <= {}".format(no_of_items))
+        else:
+            print("What you want to update : ")
+            print("Press 1: Time\nPress 2: Work")
+            choice=int(input())
+            if choice==1:
+                print("Enter your updated time :")
+                time=input()
+                p=todo[pos+1].index(":")
+                y=0
+                with open('./TODO (CLI-VER)/todolist.txt','w') as f:
+                    for i in range(len(todo)):
+                        if i==pos+1:
+                            f.write(str(pos)+"    "+time+""+''.join(todo[pos+1][p+3:]))
+                        else:
+                            f.write(todo[i])
+            elif choice==2:
+                print("Enter your updated work :")
+                work=input()
+                p=todo[pos+1].index(":")
+                y=0
+                with open('./TODO (CLI-VER)/todolist.txt','w') as f:
+                    for i in range(len(todo)):
+                        if i==pos+1:
+                            f.write(str(pos)+"    "+''.join(todo[pos+1][p-2:p+3])+"                   "+work)
+                        else:
+                            f.write(todo[i])
+    elif n==4:
+        print("Your Current List: ")
+        todo=[]
+        print("____________________________________________________________")
+        with open('./TODO (CLI-VER)/todolist.txt') as f:
+            for i in f.readlines():
+                print(i)
+                todo.append(i)
+        print("____________________________________________________________")
+    print("Press 1: Add Item \nPress 2: Delete the Item\nPress 3: Update item\nPress 4:Display Items\nPress 5:Exit")
+    n=int(input())        
+print("Thank you for using our application")