File Handling in Python | Open, Read, Write, Append and Close Operations in Python - Tutorial #60
In this video tutorial, we will discuss file handling in Python, including open, read, write, append, and close operations in Python programming.
File handling in python refers to the process of working with files, such as reading from, writing to, and manipulating files.
Example :
File handling in python is like a digital notebook where you can store, retrieve and update information.
Imagine you have a blank notebook on your computer. You can write on it, read from it or even scribble more notes without losing anything important.
Basic file Operations :
1. Opening a file
2. Reading from a file
3. Writing to a file
4. Appending to a file
5. Closing a file
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Syntax :
file = open ("filename", "mode")
The open () function takes two parameters.
Filename : The Name of the file to open.
Mode : The mode in which to open the file.
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Common Modes are :
"r" : Read ( default )
"w" : Write ( creates a new file or truncates an existing file )
"a" : Append
"b" : Binary mode ( for non-text files )
"x" : Exclusive creation ( fails if the file already exist )
"t" : Text mode (default )
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Basic operations performed on files are :
1. Opening a file : Before working with a file, you need to open it. When you open a file, you can specify the purpose, like reading from it or writing to it.
We us open () function in python to open a file.
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2. Reading from a file : After opening the file, you can read its contents. There are different ways to read a file, like reading it line by line or reding the whole file at once.
To read the file, we use read more 'r'
Open ('file.txt,'r')
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3. Writing to a file : You can also write data to a file.
If the fil already exists, it will be created
If the file doesn't exist, it will be created
To write the file, we used write mode 'w'
Open ('file.txt','w')
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4. Appending to a file : If you want to add data to an existing file without replacing its current content, you can open the file in "append" mode.
This allows you to add new data at the end of the file.
Open ('file.txt','a')
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5. Closing a file : Once you are done working with a file, you need to close it using the close () function.
This saves all changes and frees up any resources the system was using to manage the file.
file.close ()
Check out practical examples of file handling and the basic operations performed in python programming.
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