PythonFile Write
Write to an Existing File
To write to an existing file, you must add a parameter to theopen() function:
"a" - Append - will append to the end of the file
"w" - Write - will overwrite any existing content
Example
Open the file "demofile.txt" and append content to the file:
f.write("Now the file has more content!")
#open and read the file after the appending:
with open("demofile.txt") as f:
print(f.read())
Overwrite Existing Content
To overwrite the existing content to the file, use thew parameter:
Example
Open the file "demofile.txt" and overwrite the content:
f.write("Woops! I have deleted the content!")
#open and read the file after the overwriting:
with open("demofile.txt") as f:
print(f.read())
Note: the "w" method will overwrite the entire file.
Create a New File
To create a new file in Python, use theopen() method, with one of the following parameters:
"x" - Create - will create a file, returns an error if the file exists
"a" - Append - will create a file if the specified file does not exists
"w" - Write - will create a file if the specified file does not exists
Result: a new empty file is created.
Note: If the file already exist, an error will be raised.
