python常见笔试题汇总
1.有两个文件 a.txt b.txt:
a文件内容包含内容类似: b文件内容包含内容类似:
a.txt b.txt
test aaa
abc bbb
testabc abc
testabc
用pyhton语言完成文件操作,并将文件中拥有相同内容的行输出到一个新建的文件c.txt 中
解法一:
考察知识点:1)文件读写;2)split()字符串分割函数,返回值为一个数组;3)join() list转字符串函数,返回一个字符串
with open('a.txt', 'r') as f: a = f.read() a1 = a.split("\n") with open('b.txt', 'r') as f: b = f.read() b1 = b.split("\n") print(b.split("\n")) c = [] for i in range(len(a1)): if str(a1[i]) in b1: c.append(a1[i]) with open("c.txt", 'w') as f: f.write('\n'.join(c))
解法二:
with open("a.txt")as f1: lines1 = set(f1.readlines()) with open("b.txt")as f2: lines2 = set(f2.readlines()) lines = lines1 & lines2 for line in lines: with open("c.txt", "a") as f: f.write(line)
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