Python 3.4: Check if module installed

To check whether a given module is install in Python 3.4, we can use PathFinder.find_spec class method. For example, to check if pyperclip moduel is installed / available we can use the following code:

	from importlib.machinery import PathFinder
	if PathFinder.find_spec('pyperclip'):
	print('pyperclip module found')
	else:
	print('pyperclip module not found')

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