python在后面每一行后面加一個冒號或其他內容

處理簽文件

 

代碼

lines = []
with open('id.txt', 'r') as f_in:
    for line in f_in:
        line = line[0:-1] + ':' + '\n'
        lines.append(line)

with open('id_.txt', 'w') as f_out:
    f_out.writelines(lines)

　處理后文件內容