51 - Write & Create a file in Python
#python #python3 #filehandling #fileinpython
To create a new file in Python, use the open() method, with one of the following parameters:
"x" - Create - will create a file, returns an error if the file exist
"a" - Append - will create a file if the specified file does not exist
"w" - Write - will create a file if the specified file does not exist
Syntax:
f = open("King.txt", "x")
We declared the variable “f” to open a file named King.txt. Open takes 2 arguments, the file that we want to open and a string that represents the kinds of permission or operation we want to do on the file
Here, we used “w” letter in our argument, which indicates Python write to file and it will create file in Python if it does not exist in library
Plus sign indicates both read and write for Python create file operation.
To read a text file in Python, you follow these steps:
First, open a text file for reading by using the open() function.
Second, read text from the text file using the file read(), readline(), or readlines() method of the file object.
Third, close the file using the file close() method.
The file object provides you with three methods for reading text from a text file:
read() – read all text from a file into a string. This method is useful if you have a small file and you want to manipulate the whole text of that file.
readline() – read the text file line by line and return all the lines as strings.
readlines() – read all the lines of the text file and return them as a list of strings.
We will discuss how to read a text file in Python. read () − This method reads the entire file and returns a single string containing all the contents of the file . readline () − This method reads a single line from the file and returns it as string
Definition and Usage. The read () method returns the specified number of bytes from the file. Default is -1 which means the whole file.
readline () − This method reads a single line from the file and returns it as string. readlines () − This method reads all the lines and return them as the list of strings. Let there be a text file named “myfile.txt”. We need to open the file in read mode. The read mode is specified by “r”. The file can be opened using open ().