Python：对Unicode转义的字符串使用.format（）

只需将第二个字符串也设为unipre字符串

>>> s = u'u2265'>>> print s≥>>> print "{0}".format(s)Traceback (most recent call last):  File "<stdin>", line 1, in <module>UnipreEnpreError: 'ascii' prec can't enpre character u'u2265' in position 0: ordinal not in range(128)>>> print u"{0}".format(s)≥>>>