Problem solving

---
Problem-solving:-A function type application development type question with multiple functions to implement.
---
---
title: a simple to-do list.
---

# Problem Statement
Implement the following functions:
1.add_task(tasks: dict, task: str): if not prsent already in the list Adds the task to the to-do list(dictionary) unticked(key value is "Not done") else informs "The task your trying to Add is Already present ".
2.remove_task(tasks:dict, task: str): if present in the list Removes a task from the to-do list or else informs "The task your trying Remove is Not present".
3.def tick_task(tasks:dict,task:str):Ticks the task(key value is "Done") 
4.def untick_task(tasks:dict,task:str):Unticks the task(key value is "Not done")
5.view_tasks(tasks:dict): Displays all tasks in the to-do list, each on a new line.

**Example**
```
tasks={}
add_task(tasks, "Buy groceries")
add_task(tasks, "Read a book")
add_task(tasks, "Go for a walk")

view_tasks(tasks)

tick_task(tasks,"Buy groceries")
add_task(tasks, "Read a book")


view_tasks(tasks)

remove_task(tasks, "Go for a walk")

remove_task(tasks, "Go for a walk")

view_tasks(tasks)

```
Buy groceries:Not done
Read a book:Not done
Go for a walk:Not done

The task your trying to Add is Already present 

Buy groceries:Done
Read a book:Not done
Go for a walk:Not done

The task your trying Remove is Not present 

Buy groceries:Done
Read a book:Not done

# Solution

```py3 test.py -r 'python test.py'
<template>
def add_task(tasks:dict,task: str)->None:
    if task not in tasks:
      tasks[task]="Not done"
    else: return "The task your trying to Add is Already present \n"
def remove_task(tasks:dict,task:str)->None:
    if task in tasks:
      tasks.pop(task)
    else:return "The task your trying Remove is Not present \n"
def tick_task(tasks:dict,task:str)->None:
      if task in tasks:
        tasks.update({task:"Done"})
      else:print("Task not present")
def untick_task(tasks:dict,task:str)->None:
      if task in tasks:
        tasks.update({task:"Not done"})
      else:print("Task not present")
def view_tasks(tasks: dict) -> str:
  s=""
  for task in tasks:
        s= s+f"{task}:{tasks[task]}"+"\n"
  return s

</template>
<suffix_invisible>
{% include '../function_type_and_modify_check_suffix.py.jinja' %}
</suffix_invisible>
```

# Public Test Cases

## Input 1

```
tasks={}
add_task(tasks, "call 1534")
add_task(tasks, "message 8976")
add_task(tasks, "videocall 7864")

view_tasks(tasks)

tick_task(tasks, "call 1534")

add_task(tasks, "message 8976")

view_tasks(tasks)

remove_task(tasks, "videocall 7864")

remove_task(tasks, "videocall 7864")

view_tasks(tasks)

```

## Output 1

```
call 1534:Not done
message 8976:Not done
videocall 7864:Not done

The task your trying to Add is Already present 

call 1534:Done
message 8976:Not done
videocall 7864:Not done

The task your trying Remove is Not present 

call 1534:Done
```


# Private Test Cases

## Input 1

```
tasks={}
add_task(tasks, "Python lecture 7.1")
add_task(tasks, "GRPA week 5")
add_task(tasks, "Lve session")

view_tasks(tasks)

tick_task(tasks, "Python lecture 7.1")

add_task(tasks, "GRPA week 5")

view_tasks(tasks)

remove_task(tasks, "Lve session")

remove_task(tasks, "Lve session")

view_tasks(tasks)

```

## Output 1

```
Python lecture 7.1:Not done
GRPA week 5:Not done
Lve session:Not done

The task your trying to Add is Already present 

Python lecture 7.1:Done
GRPA week 5:Not done
Lve session:Not done

The task your trying Remove is Not present 

Python lecture 7.1:Done
GRPA week 5:Not done
```