relative to end of file, usually negative, although many platforms allow seeking beyond the end of a file). If the file is opened in text mode, only offsets returned by tell() are legal. Use of other offsets causes undefined behavior. Note that not all file objects are seekable. """...
f = open('/tmp/workfile', 'r+') f.write('0123456789abcdef') f.seek(5) # Go to the 6th byte in the file f.read(1) '5' f.seek (-3, 2) # Go to the 3rd byte before the end f.read(1) 'd' 五、关闭文件释放资源文件操作完毕,一定要记得关闭文件f.close(),可以释放资源供其他...
forpage_numinrange(start_page -1, end_page): output_pdf.add_page(pdf.pages[page_num]) withopen(out_path,'wb')asfile2: output_pdf.write(file2)
/usr/bin/env python,那么可以在命令行窗口中执行/path/to/script-file.py以执行该脚本文件。 注:该方法不支持 Windows 环境。 编码 默认情况下,3.x 源码文件都是 UTF-8 编码,字符串都是 Unicode 字符。也可以手动指定文件编码: # -*- coding: utf-8 -*- 或者 # encoding: utf-8 注意: 该行标注必须...
# 读取内容 data = file_object.read() print(data) # 写入内容 file_object.write("你好呀") # 将光标位置重置起始 file_object.seek(0) # 读取内容 data = file_object.read() print(data) file_object.close() 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. x+、xt+、...
file的其他方法: f=open('/tmp/workfile', 'w') print f 1. 2. 读文件实例二 myfile = open('myfile', 'r') # open for input print myfile.readline() # read the line back print myfile.readline() # empty string: end of file ...
[:port] # http://hostname[:port] # 2) Do not add a trailing slash at the end of file server path. FILE_SERVER = 'sftp://sftpuser:Pwd123@10.1.3.2' # Remote file paths: # 1) The path may include directory name and file name. # 2) If file name is not specified, indicate ...
# Maximum number of file downloading retries. MAX_TIMES_RETRY_DOWNLOAD = 3 MAX_TIMES_RETRY = 5 DELAY_INTERVAL = 10 # Define the file length. FELMNAMME_127 = 127 FELMNAMME_64 = 64 FELMNAMME_4 = 4 FELMNAMME_5 = 5 # Mode for activating the device deployment file EFFECTIVE_MODE_REBOOT...
readlines()方法是file对象提供的一个非常实用的函数,用于一次性读取文件中的所有行,并将它们作为一个字符串列表返回。假设我们有一个名为example.txt的文本文件,内容如下: Hello, World!This is a test.Another line.End of file. 使用readlines()方法读取这个文件并打印结果: with open('example.txt', 'r')...
seek(0)和f.seek(0,0)是没有区别的。file.seek()方法标准格式是：seek(offset,whence=0)offset：开始的偏移量，也就是代表需要移动偏移的字节数whence：给offset参数一个定义，表示要从哪个位置开始偏移；0代表从文件开头开始算起，1代表从当前位置开始算起，2代表从文件末尾算起。默认为0 whence ...