How to read specific lines from a File in Python? - GeeksforGeeks (2024)

Python - Convert simple lines to bulleted lines using the Pyperclip module

Pyperclip is the cross-platform Python module which is used for copying and pasting the text to the clipboard. Let's suppose you want to automate the task of copying the text and then convert them to the bulleted points. This can be done using the pyperclip module. Consider the below examples for better understanding. Examples: Clipboard Content :

Read content from one file and write it into another file

Prerequisite: Reading and Writing to text files in Python Python provides inbuilt functions for creating, writing, and reading files. Two types of files can be handled in python, normal text files and binary files (written in binary language,0s, and 1s). Text files: In this type of file, Each line of text is terminated with a special character call

Count number of lines in a text file in Python

Counting the number of characters is important because almost all the text boxes that rely on user input have a certain limit on the number of characters that can be inserted. For example, If the file is small, you can use readlines() or a loop approach in Python. Input: line 1 line 2 line 3 Output: 3 Explanation: The Input has 3 number of line in

Eliminating repeated lines from a file using Python

Let us see how to delete several repeated lines from a file using Python's File Handling power. If the file is small with a few lines, then the task of deleting/eliminating repeated lines from it could be done manually, but when it comes to large files, this is where Python comes to your rescue. Eliminating repeated lines from a file in PythonBelow

How to count the number of lines in a CSV file in Python?

CSV (Comma Separated Values) is a simple file format used to store tabular data, such as a spreadsheet or database. A CSV file stores tabular data (numbers and text) in plain text. Each line of the file is a data record. Each record consists of one or more fields, separated by commas. The use of the comma as a field separator is the source of the n

Replace Commas with New Lines in a Text File Using Python

Replacing a comma with a new line in a text file consists of traversing through the file's content and substituting each comma with a newline character. In this article, we will explore three different approaches to replacing a comma with a new line in a text file. Replace Comma With a New Line in a Text FileBelow are the possible approaches to rep

Read a Particular Page from a PDF File in Python

Document processing is one of the most common use cases for the Python programming language. This allows the language to process many files, such as database files, multimedia files and encrypted files, to name a few. This article will teach you how to read a particular page from a PDF (Portable Document Format) file in Python. Method 1: Using Pymu

How to read from a file in Python

Python provides inbuilt functions for creating, writing and reading files. There are two types of files that can be handled in python, normal text files and binary files (written in binary language, 0s and 1s). Text files: In this type of file, Each line of text is terminated with a special character called EOL (End of Line), which is the new line

Upload file and read its content in cherrypy python

CherryPy is a web framework of Python which provides a friendly interface to the HTTP protocol for Python developers. It is also called a web application library. It allows developers to build web applications in much the same way they would build any other object-oriented Python program. This results in smaller source code developed in less time.

Read List of Dictionaries from File in Python

A dictionary in Python is a collection where every value is mapped to a key. Since they are unordered and there is no constraint on the data type of values and keys stored in the dictionary, it is tricky to read dictionaries from files in Python. Read a List of Dictionary from Text Files in PythonUsing Pickle ModuleUsing read( ) MethodThe problem s

How to read Dictionary from File in Python?

A Dictionary in Python is collection of key-value pairs, where key is always unique and oftenly we need to store a dictionary and read it back again. We can read a dictionary from a file in 3 ways: Using the json.loads() method : Converts the string of valid dictionary into json form. Using the ast.literal_eval() method : Function safer than the ev

Read Properties File Using jproperties in Python

In this article, we are going to see how to read properties file in python using jproperties module. It is a Java Property file parser and writer for Python. For installation run this command into your terminal. pip install jproperties Various properties of this module: get() Method or Index-Based access to reading the values associated with the ke

How to read a numerical data or file in Python with numpy?

Prerequisites: Numpy NumPy is a general-purpose array-processing package. It provides a high-performance multidimensional array object and tools for working with these arrays. This article depicts how numeric data can be read from a file using Numpy. Numerical data can be present in different formats of file : The data can be saved in a txt file wh

Python - Read file from sibling directory

In this article, we will discuss the method to read files from the sibling directory in Python. First, create two folders in a root folder, and one folder will contain the python file and the other will contain the file which is to be read. Below is the dictionary tree: Directory Tree: root : | |__Sibling_1: | \__demo.py | |__Sibling_2: | \__file.t

How to Read Text File Into List in Python?

In this article, we are going to see how to read text files into lists in Python. File for demonstration: Example 1: Converting a text file into a list by splitting the text on the occurrence of '.'. We open the file in reading mode, then read all the text using the read() and store it into a variable called data. after that we replace the end of t

Read a text file into a string variable and strip newlines in Python

It is quite a common requirement for users to remove certain characters from their text files while displaying. This is done to assure that only displayable characters are displayed or data should be displayed in a specific structure. This article will teach you how to read a text file into a string variable and strip newlines using Python. For dem

Read File As String in Python

Python provides several ways to read the contents of a file as a string, allowing developers to handle text data with ease. In this article, we will explore four different approaches to achieve this task. Each approach has its advantages and uses cases, so let's delve into them one by one. Read File As String In PythonBelow are some of the approach

Read CSV File without Unnamed Index Column in Python

Whenever the user creates the data frame in Pandas, the Unnamed index column is by default added to the data frame. The article aims to demonstrate how to read CSV File without Unnamed Index Column using index_col=0 while reading CSV. Read CSV File without Unnamed Index Column Using index_col=0 while reading CSVThe way of explicitly specifying whic

Read a file without newlines in Python

When working with files in Python, it's common to encounter scenarios where you need to read the file content without including newline characters. Newlines can sometimes interfere with the processing or formatting of the data. In this article, we'll explore different approaches to reading a file without newlines in Python. Read a file without newl

Read a file line by line in Python

Prerequisites: Open a file Access modes Close a file Python provides inbuilt functions for creating, writing, and reading files. There are two types of files that can be handled in python, normal text files and binary files (written in binary language, 0s, and 1s). In this article, we are going to study reading line by line from a file. Learning Ef

Read JSON file using Python

The full form of JSON is JavaScript Object Notation. It means that a script (executable) file which is made of text in a programming language, is used to store and transfer the data. Python supports JSON through a built-in package called JSON. To use this feature, we import the JSON package in Python script. The text in JSON is done through quoted-

Find line number of a specific string or substring or word from a .txt file in Python

Finding the line number of a specific string and its substring is a common operation performed by text editors or any application with some level of text processing capabilities. In this article, you will learn how to find line number of a specific string or substring or word from a .txt (plain text) file using Python. The problem in hand could be

Retrieve A Specific Element In a Csv File using Python

We have given a file and our task is to retrieve a specific element in a CSV file using Python. In this article, we will see some generally used methods for retrieving a specific element in a CSV file. Retrieve a Specific Element in a CSV File Using PythonBelow are some of the ways by which we can retrieve a specific element in a CSV file using Pyt

Read a zipped file as a Pandas DataFrame

In this article, we will try to find out how can we read data from a zip file using a panda data frame. Why we need a zip file? People use related groups of files together and to make files compact, so they are easier and faster to share via the web. Zip files are ideal for archiving since they save storage space. And, they are also useful for secu

How to read a CSV file to a Dataframe with custom delimiter in Pandas?

Python is a good language for doing data analysis because of the amazing ecosystem of data-centric python packages. pandas package is one of them and makes importing and analyzing data so much easier.Here, we will discuss how to load a csv file into a Dataframe. It is done using a pandas.read_csv() method. We have to import pandas library to use th

How to read csv file with Pandas without header?

Prerequisites: Pandas A header of the CSV file is an array of values assigned to each of the columns. It acts as a row header for the data. This article discusses how we can read a csv file without header using pandas. To do this header attribute should be set to None while reading the file. Syntax: read_csv("file name", header=None) ApproachImport

Read Text file into PySpark Dataframe

In this article, we are going to see how to read text files in PySpark Dataframe. There are three ways to read text files into PySpark DataFrame. Using spark.read.text()Using spark.read.csv()Using spark.read.format().load() Using these we can read a single text file, multiple files, and all files from a directory into Spark DataFrame and Dataset. T

PySpark - Read CSV file into DataFrame

In this article, we are going to see how to read CSV files into Dataframe. For this, we will use Pyspark and Python. Files Used: authorsbook_authorbooksRead CSV File into DataFrame Here we are going to read a single CSV into dataframe using spark.read.csv and then create dataframe with this data using .toPandas(). C/C++ Code from pyspark.sql import

Read File Without Saving in Flask

Flask is a flexible, lightweight web-development framework built using python. A Flask application is a Python script that runs on a web server, which listens to HTTP requests and returns responses. It is designed for simple and faster development. In this article we will discuss how can we Read files without Saving them in Flask, we will also veri

Upload and Read Excel File in Flask

In this article, we will look at how to read an Excel file in Flask. We will use the Python Pandas library to parse this excel data as HTML to make our job easier. Pandas additionally depend on openpyxl library to process Excel file formats. Before we begin, make sure that you have installed both Flask and Pandas libraries along with the openpyxl d