python - 模块在 Python 中不可调用？

Question

我遇到了 Python 错误。请参阅下面的代码示例。我运行 event_timer.py 并收到以下错误消息。下面列出的两个文件都在同一个文件夹中。

Traceback (most recent call last):  File "E:\python\event_timer\event_timer.py", line 7, in     timer = EventTimer()TypeError: 'module' object is not callable

What am I missing?

event_timer.py:

import EventTimer

timer = EventTimer()

timer.addStep("Preheat Oven", seconds = 10)
timer.addStep("Cook Pizza", seconds = 20)
timer.addStep("Done!")

timer.start()

事件定时器.py:

import time

class Timer:

    event = 'Event'
    steps = []

    def __init__(self, event = None):

        if event is not None:

            self.event = event

    def addStep(self, step, seconds = None, minutes = None, hours = None, days = None):

        if seconds is not None:

            unit = 'seconds'
            amount = seconds

        elif minutes is not None:

            unit = 'minutes'
            amount = minutes

        elif hours is not None:

            unit = 'hours'
            amount = hours

        elif days is not None:

            unit = 'days'
            amount = days

        else:

            print 'Invalid arguments'

            return False

        self.steps.append({'unit': unit, 'amount': amount})

        return True

    def __timeInSeconds(self, unit, amount):

        if unit == 'seconds':

            return amount

        elif unit == 'minutes':

            return amount * 60

        elif unit == 'hours':

            return amount * 60 * 60

        elif unit == 'days':

            return amount * 60 * 60 * 24

        else:

            print 'Invalid unit'

            return False

    def start(self):

        if len(self.steps) == 0:

            print 'No steps to complete'

            return False

        print "{0} has started.".format(self.event)

        for step in self.steps:

            print step.step

            time.sleep(self.__timeInSeconds(step.unit, step.amount))

            print "Completed"

        print 'Event complete'

Answer 1

当你写作时

import EventTimer

您创建了一个新变量，EventTimer，指向一个模块——您刚刚编写的模块!该模块内部是一个类 Timer。所以要创建该类的实例，您可以

timer = EventTimer.Timer()