Question

如何在Python中读取文件并将其内容写入具有以下条件的其他文件：

如果字符是输入文件中的字母，则该字母应为小写并写入输出文件。不应写其他字符。

def lower_case():

    file_name = input("Enter the file name to read from: ")
    tmp_read = open(str(file_name), 'r')
    tmp_read.readline()

    fileName = input("Enter the file name to write to... ")
    tmp_write = open(str(fileName), "w")
    for line in tmp_read:
        if str(line).isalpha():
            tmp_write.write(str(line).lower())
    print("Successful!")

if __name__ == "__main__":
    lower_case()

Answer 1

这将检查字符isalpha（）或isspace（）的天气，然后写入新文件。

#!/usr/bin/env python
# -*- coding: utf-8 -*-

def lower_case():

    input_name = input("Enter the file name to read from: ")
    output_name = input("Enter the file name to write to... ")

    with open(str(input_name), 'r') as i:
        content = i.readlines()
        with open(str(output_name),'wb') as o:
            for line in content:
                o.write(''.join(c for c in line if c.isalpha() or c.isspace()).lower())

if __name__ == "__main__":
    lower_case()

Answer 2

<强>代码

input_f = input("Enter the file name to read from: ")
output_f = input("Enter the file name to write to... ")

fw = open(output_f, "w")

with open(input_f) as fo:
    for w in fo:
        for c in w: 
            if c.isalpha():
                fw.write(c.lower())
            if c.isspace():
                fw.write('\n')

fo.close()
fw.close()

input.txt中

HELLO
12345
WORLD
67890
UTRECHT
030
dafsf434ffewr354tfffff44344fsfsd89087uefwerwe

output.txt的

hello

world

utrecht

dafsfffewrtffffffsfsduefwerwe

<强>来源

在Python中只将小写字母写入文件

2 个答案: