It is important to note that Python strings can have binary data and not just text. The write() method writes any string to an open file. We would see how to use read() and write() methods to read and write files. The file object provides a set of access methods to make our lives easier. Here is a list of all attributes related to file object − Once a file is opened and you have one file object, you can get various information related to that file. If the file does not exist, it creates a new file for reading and writing. The file pointer is at the end of the file if the file exists. Opens a file for both appending and reading in binary format. Opens a file for both appending and reading. If the file does not exist, it creates a new file for writing. Opens a file for appending in binary format. If the file does not exist, creates a new file for reading and writing. Overwrites the existing file if the file exists. Opens a file for both writing and reading in binary format. Opens a file for both writing and reading. If the file does not exist, creates a new file for writing. Opens a file for writing only in binary format. The file pointer placed at the beginning of the file. Opens a file for both reading and writing in binary format. Opens a file for both reading and writing. The file pointer is placed at the beginning of the file. Opens a file for reading only in binary format. Here is a list of the different modes of opening a file − If negative, the buffer size is the system default(default behavior). If you specify the buffering value as an integer greater than 1, then buffering action is performed with the indicated buffer size. If the buffering value is 1, line buffering is performed while accessing a file. This is optional parameter and the default file access mode is read (r).īuffering − If the buffering value is set to 0, no buffering takes place. A complete list of possible values is given below in the table. Syntaxįile object = open(file_name )įile_name − The file_name argument is a string value that contains the name of the file that you want to access.Īccess_mode − The access_mode determines the mode in which the file has to be opened, i.e., read, write, append, etc. This function creates a file object, which would be utilized to call other support methods associated with it. The open Functionīefore you can read or write a file, you have to open it using Python's built-in open() function. You can do most of the file manipulation using a file object. Python provides basic functions and methods necessary to manipulate files by default. Now, we will see how to use actual data files. Until now, you have been reading and writing to the standard input and output. This would produce the following result against the entered input −Įnter your input: The input() function is equivalent to raw_input, except that it assumes the input is a valid Python expression and returns the evaluated result to you. When I typed "Hello Python!", its output is like this − This prompts you to enter any string and it would display same string on the screen. The raw_input() function reads one line from standard input and returns it as a string (removing the trailing newline). Python provides two built-in functions to read a line of text from standard input, which by default comes from the keyboard. Python is really a great language, isn't it? This produces the following result on your standard screen − Print "Python is really a great language,", "isn't it?"
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