A. openFile('r') B. fileOpen('r') C. open('r') D. readFile() 相关知识点: 试题来源: 解析 C。本题考查 Python 中打开文件的方法。选项 A 和 B 的表达错误。选项 D 是读取文件的方法,不是打开文件。选项 C open('r')是正确的打开文件用于读取的方法。反馈...
To open a file for reading it is enough to specify the name of the file: f =open("demofile.txt") The code above is the same as: f =open("demofile.txt","rt") Because"r"for read, and"t"for text are the default values, you do not need to specify them. ...
Python中,使用open()方法打开一个文件后,可以读取该文件中的内容,读取文件内容的方式有多种,其中每次只能读取一行的是( )A. readlines()B
open(file, mode='r', buffering=None, encoding=None, errors=None, newline=None, closefd=True) 其中mode列表为: 'r' #open for reading (default) 'w' #open for writing, truncating the file first 'x' #create a new file and open it for writing,python3新增 'a' #open for writing, appe...
After reading this tutorial, you can learn: – How to open a file in Python using both relative and absolute path Different file access modes for opening a file How to open a file for reading, writing, and appending. How to open a file using thewithstatement ...
Python-文件阅读(open函数) mode是一个可选的字符串,它指定文件的模式已打开。它默认为“r”,这意味着可以在文本中阅读模式。其他常用值是“w”用于写入(如果它已经存在),用于创建和写入新文件的“x”,以及'a'表示附加(在某些Unix系统上,表示所有写入追加到文件末尾,而不考虑当前的查找位置)。在文本模式下,...
try:f=open('/path/','r')print(f.read())finally:iff:f.close() 每次都这么写实在太繁琐,所以,Python引入了with语句来自动帮我们调用close()方法: 代码语言:javascript 复制 withopen('/path/to/file','r')asf:print(f.read()) 这和前面的try ... finally是一样的,但是代码更佳简洁,并且不必调用...
相关知识点: 试题来源: 解析 A 答案: A 解释: 在Python中,可以使用read()方法来读取文件内容。open()方法用于打开文件并返回文件对象,write()方法用于向文件中写入数据,close()方法用于关闭文件。因此,如果要读取文件内容,应该使用read()方法。反馈 收藏 ...
Write and Read (‘w+’): Open the file for reading and writing. For existing file, data is truncated and over-written. The handle is positioned at the beginning of the file. Append Only (‘a’): Open the file for writing. The file is created if it does not exist. The handle is ...
file = open('example.txt', 'r') data = file.read() print(data) Reading a File Line-By-Line Sometimes, you may want to read a file line-by-line. To do that, you can use aforloop to loop through the file line-by-line. The following code demonstrates how to read a file line-...