摘要:
In [21]: str1='' In [22]: for i in range(10): ...: str1=str1+str(i) ...: In [23]: str1 Out[23]: '0123456789' In [24]: str1[0:10] Out[24]: '0123456789' In [25]: str1[:10] Out[25]: '01... 阅读全文
posted @ 2018-06-05 11:14
酸奶加绿茶
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