Python面試題

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1、去除列表中的重複元素

#_*_coding:utf-8_*_ls = [1,3,6,9,2,5,1,3,7,8,6]print(‘ls  >>> ‘,ls)# 方法1ls1 = list(set(ls))print(‘ls1 >>> ‘,ls1)# 方法2ls2 = {}.fromkeys(ls).keys()ls2 = [l for l in ls2]print(‘ls2 >>> ‘,ls2)# 方法3ls3 = list(set(ls))ls3.sort(key=ls.index)  #保持原list元素順序print(‘ls3 >>> ‘,ls3)# 方法4ls4 = [][ls4.append(i) for i in ls if i not in ls4]print(‘ls4 >>> ‘,ls4)

2、刪除指定檔案

#_*_coding:utf-8_*_import osfilepath = ‘t.txt‘os.remove(filepath)

3、讀取檔案中的內容並列印在螢幕上

with open(‘1.txt‘,‘r‘) as fp:    contents = fp.readlines()    print(contents)    for content in contents:        print(content.replace(‘\n‘,‘‘))

5、反向擷取list元素最快的方式

ls = [1,3,6,9,2,5,1,3,7,8,6]ls6 = ls[::-1]

4、 list和tuple的互相轉換

ts = (1, 3, 6, 9, 2, 5, 1, 3, 7, 8, 6)ls = [1, 3, 6, 9, 2, 5, 1, 3, 7, 8, 6]list(ts)tuple(ls)

 

Python面試題