Python文件IO

Python文件IO

有如下文本内容，文件路径为D:\temp，文件名称为lyric.txt，

line1 Look !
line2 If U had one shot
line3 One opportunity
line4 To seize everything U ever wanted
line5 One moment
line6 Would U capture it ?
line7 Or just let it slip

　　

1. 逐行读取，并输出

   #coding=utf-8
   import os
   file_path = r'D:\temp'
   file_name = 'lyric.txt'
   #拼接文件路径与名称
   file_URI = os.path.join(file_path,file_name)
   print("file_URI--  " + file_URI)
   fd = open(file_URI, mode='r')
   #逐行读取文件内容
   for line in fd:
       #输出每行内容，每行行尾有换行符号
       print(line)

   输出结果，单独输出每行，包含此行的换行符：

2. file_URI--  D:\temp\lyric.txt
   line1 Look ! 
   
   line2 If U had one shot
   
   line3 One opportunity
   
   line4 To seize everything U ever wanted
   
   line5 One moment
   
   line6 Would U capture it ? 
   
   line7 Or just let it slip

3. read()，读取全部内容

   #coding=utf-8
   import os
   file_path = r'D:\temp'
   file_name = 'lyric.txt'
   file_URI = os.path.join(file_path,file_name)
   print("file_URI--  " + file_URI)
   fd = open(file_URI, mode='r')
   content = fd.read()
   print(content)

   输出结果

   file_URI--  D:\temp\lyric.txt
   line1 Look !
   line2 If U had one shot
   line3 One opportunity
   line4 To seize everything U ever wanted
   line5 One moment
   line6 Would U capture it ?
   line7 Or just let it slip

4. readlines()，读取全部内容，返回每行内容作为元素的列表

   #coding=utf-8
   import os
   file_path = r'D:\temp'
   file_name = 'lyric.txt'
   file_URI = os.path.join(file_path,file_name)
   print("file_URI--  " + file_URI)
   fd = open(file_URI, mode='r')
   content_list = fd.readlines()
   print(content_list)

   输出结果

   file_URI--  D:\temp\lyric.txt
   ['line1 Look ! \n', 'line2 If U had one shot\n', 'line3 One opportunity\n', 'line4 To seize everything U ever wanted\n', 'line5 One moment\n', 'line6 Would U capture it ? \n', 'line7 Or just let it slip']