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Reading and Writing Text Files in Python

Introduction
Setting Up Your Python Environment
Installing Python and PyCharm IDE Creating and Running Your First Python Program
Python Data Types
Numeric Types String Types Boolean Types None Type
Operators and Expressions
Arithmetic Operators Comparison Operators Logical Operators Bitwise Operators Assignment Operators Operator Precedence
Control Flow Statements
Conditional Statements Loops Break and Continue Statements Exception Handling
Functions and Modules
Defining and Calling Functions Function Arguments and Return Values Lambda Functions Modules and Packages
Python Data Structures
Lists Tuples Dictionaries Sets Arrays
ObjectOriented Programming in Python
Classes and Objects Attributes and Methods Inheritance and Polymorphism Abstract Classes and Interfaces
File Handling
Opening and Closing Files Reading and Writing Text Files Reading and Writing Binary Files CSV Files
Regular Expressions
Basic Regular Expressions and Metacharacters Anchors and Quantifiers Grouping and Capturing Lookarounds
Datetime and Timezones
Date and Time Objects Date and Time Formatting Timezone and Daylight Saving Time Handling
Debugging and Testing
Debugging Techniques Debugging Tools in PyCharm Unit Testing with PyTest
Web Scraping with Python
Requesting Data with urllib Parsing HTML with Beautiful Soup Extracting and Storing Data
Database Handling with Python
Connecting to Databases Performing CRUD Operations Database Access with ORM (ObjectRelational Mapping)
Introduction to Data Science with Python
NumPy Pandas Matplotlib ScikitLearn
GUI Programming with Python
Creating GUI Applications GUI Toolkits (Tkinter, PyQt, wxWidgets)
Network Programming with Python
Socket Programming Creating and Running a Simple Web Server Connecting to APIs
Best Practices and Tips
Python Coding Standards Code Organization Writing Efficient Code Tips and Tricks for Python Development
Conclusion and Next Steps.

Reading and Writing Text Files

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In Python, reading and writing text files is a fundamental concept that you need to know. A text file is a file that contains ASCII or Unicode characters, and each character represents a single byte.

Reading a text file primarily involves opening the file, reading its contents, and closing the file.

Here is an example:

 
                    
with open('file.txt', 'r') as f:
  contents = f.read()
  print(contents)

In this example, we opened a file named file.txt in read mode ('r'), read its contents using the read() function, stored the contents in a variable named contents, and printed the contents to the console.

Writing to a text file involves opening the file in write mode ('w'), writing or appending to the file, and then closing the file.

Here is an example:

 
                    
with open('file.txt', 'w') as f:
  f.write('Hello, world!')

In this example, we opened a file named file.txt in write mode ('w'), wrote the string 'Hello, world!' to the file using the write() function, and then closed the file.

Overall, understanding how to read and write text files is essential for working with data and information in Python.

March 25, 2023

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