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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def find_exe(arch='x86'):
 """Get the path to an exe launcher provided by this package. The options for arch are currently 'x86' and 'x64'. """

    if arch == 'x86':
        return os.path.join(_pkg_dir, 'cli-32.exe')
    elif arch == 'x64':
        return os.path.join(_pkg_dir, 'cli-64.exe')

    raise ValueError('Unrecognised arch: %r' % arch)