Activity time & duration tracker

This is my first attempt at creating a simple Python tool that tracks the time of certain activities retrieved from a database. After stopping the timer, this tool writes the duration of the activity into the database.

Can you please provide me some tricks to make this code more Pythonic?

objects.py

```
#!/usr/bin/env python
# -- coding: utf-8 --

class Project:
'''Class that holds the projects'''
projects = []

def __init__(self, name):
self.name = name
self.tasks = []
type(self).projects.append(self)

def __str__(self):
return self.name

@property
def name(self):
return self._name

@name.setter
def name(self, name):
if not name:
raise ValueError(_('You need to specify a value!'))
self._name = name

def add_task(self, task):
if (task not in self.tasks):
self.tasks.append(task)

def get_tasks(self):
return self.tasks

@staticmethod
def get_project_by_name(name):
for project in Project.projects:
if name == project.name:
return project

class Task:
'''A task for a project'''
def __init__(self, id, name):
self.id = id
self.name = name

def __str__(self):
return '{0}:{1}'.format(self.id, self.name)

def __eq__(self, other):
return self.id == other.id and self.name == other.name

@property
def name(self):
return self._name

@name.setter
def name(self, name):
if not name:
raise ValueError(_('You need to specify a value!'))
self._name = name

class Entry:
'''A timesheet entry that contains the task, the date and the time spent'''
def __init__(self, task, date, duration):
self.task = task
self.date = date
self.time_in_minutes = self._get_dur

Fix indentation in you objects.py, use 4 spaces instead of tabs+spaces

so it will look like this:

class Project:
'''Class that holds the projects'''
projects = []

def __init__(self, name):
    self.name = name
    self.tasks = []
    type(self).projects.append(self)
...

You don't need parenthesis here

if (task not in self.tasks):

Just write

if task not in self.tasks:

You might want to store projects as dict(project.name: project) instead of list so this:

@staticmethod
def get_project_by_name(name):
        for project in Project.projects:
                if name == project.name:
                        return project

will be just:

@staticmethod
def get_project_by_name(name):
    return Project.projects[name]

In case if you will have multiple projects with the same name you can make it dict(project.name: [projects_list])

in database.py

I would not keep db connection always open, I would connect to it each time I need it.

then

for result in query:
        task = Task(result[0], result[1])
        Project.get_project_by_name(project_name).add_task(task)

will be prettier if:

for _id, name in query:
    task = Task(_id, name)
    Project.get_project_by_name(project_name).add_task(task)

in main.py
its not clear why you need state to be a global variable.

StackExchange Code Review Q#144729, answer score: 2