python中查看列表元素及调整列表元素位置

 

>>> test1 = ["aaa","bbb","ccc","ddd"] >>> type(test1) <class 'list'>
>>> len(test1) 4
>>> test1[0] ## 查看第一个元素 'aaa'
>>> test1[2] 'ccc'
>>> test1[-1] ## 查看最后一个元素 'ddd'
>>> test1[-2] 'ccc'
>>> temp = test1[0] ## 以下调整第一个元素和第四个元素位置 >>> test1[0] = test[3] >>> test1[0] = test1[3] >>> test1[3] = temp >>> test1 ['ddd', 'bbb', 'ccc', 'aaa'] >>> test1 = ["aaa","bbb","ccc","ddd"] >>> test1 ['aaa', 'bbb', 'ccc', 'ddd'] >>> test1[0],test1[3] = test1[3],test1[0] ## 调整元素位置 >>> test1 ['ddd', 'bbb', 'ccc', 'aaa']