import time

class TimeDevice():

    def __init__(self):
        self.start_time = time.time()

    def reset_start_time(self):
        self.start_time = time.time()

    def elapsed_time(self):
        return time.time() - self.start_time

5615e203567a34bb8032d89b4ca2a7c583f58491
<mask token>


class TimeDevice:
    <mask token>

    def reset_start_time(self):
        self.start_time = time.time()
    <mask token>

<mask token>


class TimeDevice:
    <mask token>

    def reset_start_time(self):
        self.start_time = time.time()

    def elapsed_time(self):
        return time.time() - self.start_time

<mask token>


class TimeDevice:

    def __init__(self):
        self.start_time = time.time()

    def reset_start_time(self):
        self.start_time = time.time()

    def elapsed_time(self):
        return time.time() - self.start_time

import time


class TimeDevice:

    def __init__(self):
        self.start_time = time.time()

    def reset_start_time(self):
        self.start_time = time.time()

    def elapsed_time(self):
        return time.time() - self.start_time

import time

class TimeDevice():

    def __init__(self):
        self.start_time = time.time()

    def reset_start_time(self):
        self.start_time = time.time()

    def elapsed_time(self):
        return time.time() - self.start_time
