1.1 打开文件---file.open() 1.2 读取文件---file.read() 1.3 写入文件---file.write() 1.4 查找内容---file.seek() 2. re库的文本处理 参考资料 0. 背景 最近在写后端接口的时候,需要对.c、.conf等类型的文件进行读写操作,在这里整理一下学习收获。 1. file库的文件操作 file库是python中用于处理...
1file = open('d:/test.txt','r',encoding='utf-8')2data =file.read()3file.close() 在执行 file.read() 从文件中读取数据时,有可能产生IOError 异常。一旦出错,后面的 file.close() 就不会执行,所有无论是否出错都能正常关闭文件,可以使用 try...finally 来示实现异常处理 try: file= open('d:...
File "<stdin>", line 1, in <module> IOError: File not open for writing 1. 2. 3. 4. 应该先指定可写的模式 >>> f1 = open('/tmp/test.txt','w') >>> f1.write('hello boy!') 1. 2. 但此时数据只写到了缓存中,并未保存到文件,而且原先里面的配置被清空了。 关闭这个文件即可将缓存...
ValueError: I/O operation on closed file. # 读取文件:第一种写法 try: my_test_file = open("io_test.txt", encoding='utf-8') content = my_test_file.read() print(content) finally: if my_test_file: my_test_file.close() 当处理一个文件对象时, 使用 with 关键字是非常好的方式。在结束...
File"", line 1, in ValueError: I/O operation on closed file. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 如果我们多次打开文件,这个过程有点啰嗦。python提供了with语句,将会自动调用close()方法: >>> with open('err.py','r') as f: ...
write(word+" "+str(word_freq[word])+"\n") f.close() countfile(infile_path,outfile_path) print("文件"+infile_path+"已统计词频") print("词频文件存在"+outfile_path+"中") 在cmd窗口运行 python D:\\Python学习\\python基础课\文件处理实例_统计词频.py D:\\Python学习\\python基础课\\some...
myfile.write("hello world!")#将指定的数据保存到文件 myfile.close()#保存并关闭文件夹 写完这段代码后点击运行,然后系统就生成了一个word文档,我们打开也可以看到里面的内容 这里我的命令是打开一个名为hello.doc的word文档,如果没有这个文件,系统就会创建一个名为hello.doc的word并把内容存入里面,我们将其保...
defopening():print("You're in a Labrynthe.")print("There's a door on your left.")print("There's a door on your right.")print("Or you can go ahead.") next=raw_input("> ")if"right"innext:right_room()elif"left"innext:left_room()elif"ahead"innext:ahead()else:print(...
Click on the "Try it Yourself" button to see how it works. Python File Handling In our File Handling section you will learn how to open, read, write, and delete files. Python File Handling Python Database Handling In our database section you will learn how to access and work with MySQL...
Write mode ('w'): This mode is used to write to a file. It will create a new file if the file does not exist, and overwrite the file if it does exist. Append mode ('a'): This mode is used to add new data to the end of an existing file (append to a file). If the file...