假定有下面的列表：names=['banana','orange','pear','apple']，编程实现输出结果为’I have banana,orange,pear and apple.'

可以使用 Python 的字符串的 join() 方法和字符串的格式化操作实现：

names = ['banana', 'orange', 'pear', 'apple']
msg = 'I have {}.'.format(', '.join(names[:-1])) + ' and ' + names[-1] + '.'
print(msg)

输出结果为：

I have banana, orange, pear and apple.