file_object = open('thefile.txt') try: all_the_text = file_object.read( ) finally: file_object.close( ) #读固定字节 file_object = open('abinfile', 'rb') try: while True: chunk = file_object.read(100) if not chunk: break do_something_with(chunk) finally: file_object.close( )...
Read Only (‘r’) :Open text file for reading. The handle is positioned at the beginning of the file. If the file does not exists, raises I/O error. This is also the default mode in which file is opened. Read and Write (‘r+’) :Open the file for reading and writing. The hand...
2、写入字符串数据 # 写入字符串数据withopen("file.txt","w")asfile:file.write("Hello, World!\...
>>> f2 = open('/tmp/test.txt','r+') >>> f2.write('\nhello aa!') >>> f2.close() [root@node1 python]# cat /tmp/test.txt hello aay!如何实现不替换?1 2 3 4 5 6 7 8 >>> f2 = open('/tmp/test.txt','r+') >>> f2.read() 'hello girl!' >>> f2.write('\nhell...
read()) # 读取内容 with open("text_2.txt", "w+", encoding="utf-8") as f2: f2.write("Test") # 写入内容 f2.seek(0) # 回到起始位置 print("w+:", f2.read()) # 读取内容 执行结果: C:\Users\dengf\anaconda3\python.exe I:\dengf_Network_Engineer_Python\文件读取模式\test.py...
写入文本文件也很简单，你可以使用write()方法。# 打开文件withopen('example.txt','w')asfile:# ...
f.write("\n")defread_and_write():"""先读,再写"""file_name="read_and_write.txt"with open(file_name,'r+', encoding='utf-8') as f: rest=f.read()#若文件中含有1 写入aaa 反之写入bbbif"1"inrest: f.write("aaa")else:
with open("python.txt", "w") as file: content = "Hello, Welcome to Python Tutorial !! \n" file.write(content) file.close() # Program to read the entire file (absolute path) using read() function with open("C:/Projects/Tryouts/python.txt", "r") as file: ...
file.write(str(item) + '\n') # 布尔值也需要转换为字符串 print("数据已保存到data.txt文件中。") 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 在这个示例中,我们首先定义了三个列表,它们分别包含整数、字符串和布尔值。然后,我们...
filename = "when_old.txt"with open (filename ,'w') as fhand: fhand.write ('When you are old\n') fhand.write ('William Butler Yeats\n') 例子中使用w权限打开该文件,并写入两行。(如果该文件存在,则内容会被覆盖) fhand.write()不会自动添加换行符,所以如果需要换行,需在末尾添加\n。 统...