How to Read Every Text File in a Directory Python
Table of Contents Hide
- Steps to Read Text File in Python
- Python open() office
- Methods for Reading file contents
- Python close() function
- Examples for Reading a Text file in Python
- Example ane – Read the entire text file using the read() part
- Example 2 – Read the specific length of characters in a text file using the read() function
- Instance 3 – Read a single line in a file using the readline() function
- Instance iv- Read text file line by line using the readline() function
- Example v – Read all the lines as a list in a file using the readlines() function
Python provides built-in functions to perform file operations, such as creating, reading, and writing files. At that place are mainly ii types of files that Python tin handle, normal text files and binary files. In this tutorial, we volition accept a expect at how to read text files in Python.
Steps to Read Text File in Python
In Python, to read a text file, you demand to follow the below steps.
Stride i: The file needs to be opened for reading using the open() method and laissez passer a file path to the function.
Stride 2: The side by side step is to read the file, and this tin can exist accomplished using several built-in methods such every bit read() , readline() , readlines() .
Step 3: In one case the read operation is performed, the text file must be airtight using the close() office.
At present that nosotros have seen the steps to read the file content allow'south understand each of these methods earlier getting into examples.
Python open() function
The open() function opens the file if possible and returns the corresponding file object.
Syntax – open up(file, fashion='r', buffering=-one, encoding=None, errors=None, newline=None, closefd=True, opener=None)
The open() office has a lot of parameters. Let's have a await at the necessary params for reading the text file. It opens the file in a specified fashion and returns a file object.
Parameters
- file – path like object which represents the file path
- style (Optional) – The
fashionis an optional parameter. It's a string that specifies the mode in which yous desire to open the file.
| Mode | Description |
|---|---|
'r' | Open a file for read mode (default if fashion is non specified) |
'w' | Open a file for writing. Python will create a new file if does not exist or truncates a file content if file exists |
'x' | Open a file for exclusive creation. |
'a' | Open a file for appending the text. Creates a new file if file does not exist. |
't' | Open up a file in text mode. (default) |
'b' | Open a file in binary mode. |
'+' | Open up a file for updating (reading and writing) |
Example
file = open('C:\hello.txt','r') Methods for Reading file contents
At that place are three ways to read data from a text file.
-
read(): Theread()office returns the read bytes in the form of string. This method is useful when you have a small file, and yous desire to read the specified bytes or entire file and store it into a string variable. -
readline(): Thereadline()function returns one line from a text file and retuns in the class of cord. -
readlines(): Thereadlines()function reads all the lines from the text file and returns each line as a string element in a list.
Python close() function
The file will remain open up until you shut the file using the close() role. It is a must and all-time practise to perform this operation later on reading the data from the file as it frees upward the retentivity infinite acquired by that file. Otherwise, information technology may cause an unhandled exception.
Examples for Reading a Text file in Python
Case 1 – Read the entire text file using the read() function
In the beneath example, we are reading the entire text file using the read() method. The file can be opened in the read style or in a text mode to read the data, and it can be stored in the string variable.
# Program to read the unabridged file using read() office file = open("python.txt", "r") content = file.read() print(content) file.shut() # Program to read the entire file (absolute path) using read() function file = open("C:/Projects/Tryouts/python.txt", "r") content = file.read() print(content) file.shut() Output
Dear User, Welcome to Python Tutorial Accept a not bad learning !!! Thank you Example ii – Read the specific length of characters in a text file using the read() function
At that place are times where you need to read the specific bytes in a file. In that example, you lot can apply the read() function by specifying the bytes. The method will output just the specified bytes of characters in a file, as shown beneath.
# Program to read the specific length # of characters in a file using read() office file = open("python.txt", "r") content = file.read(twenty) impress(content) file.close() Output
Dear User, Welcome Example three – Read a single line in a file using the readline() function
If you desire to read a single line in a file, then yous could reach this using readline() function. You lot as well utilize this method to retrieve specific bytes of characters in a line, similar to the read() method.
# Program to read single line in a file using readline() function file = open up("python.txt", "r") content = file.readline() print(content) file.close() Output
Dear User, Example iv- Read text file line by line using the readline() function
If you want to traverse the file line by line and output in any format, then you lot could use the while loop with the readline() method as shown below. This is the most effective way to read the text file line by line in Python.
# Plan to read all the lines in a file using readline() function file = open("python.txt", "r") while Truthful: content=file.readline() if non content: pause print(content) file.close() Output
Dearest User, Welcome to Python Tutorial Have a swell learning !!! Cheers Case 5 – Read all the lines as a listing in a file using the readlines() function
The readlines() method will read all the lines in the file and outputs in a list of strings, as shown below. Later y'all can use the listing to traverse and extract the specified content from the list.
# Programme to read all the lines as a list in a file # using readlines() function file = open up("python.txt", "r") content=file.readlines() print(content) file.close() Output
['Beloved User,\northward', 'Welcome to Python Tutorial\n', 'Have a great learning !!!\n', 'Cheers'] 
Sign Up for Our Newsletters
Go notified of the best deals on our WordPress themes.
Source: https://itsmycode.com/python-read-text-file/
0 Response to "How to Read Every Text File in a Directory Python"
Enregistrer un commentaire