Python File Handling Basics
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Python File Handling Basics
File handling is an essential aspect of programming that allows developers to store, read, and manipulate data in external files. Python offers built-in functions to perform file operations efficiently.
To begin working with files, use the open() function. This function takes two main arguments: the file name and the mode. The common modes are:
'r': Read (default)
'w': Write (creates a new file or overwrites existing)
'a': Append
'b': Binary mode (used with others like 'rb' or 'wb')
Example:
python
file = open("example.txt", "r")
content = file.read()
print(content)
file.close()
To avoid manual closing of files, Python provides the with statement, which ensures the file is properly closed even if an error occurs:
python
with open("example.txt", "r") as file:
content = file.read()
print(content)
For writing:
python
with open("example.txt", "w") as file:
file.write("Hello, world!")
To append data without erasing the file's contents:
python
with open("example.txt", "a") as file:
file.write("\nAppended text.")
Reading methods include read(), readline(), and readlines() for full content, single line, or list of lines respectively.
File handling is crucial for tasks like logging, data storage, and configuration management. Python’s simple syntax makes file operations intuitive and powerful, laying the foundation for more advanced file and data processing.
Read More
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Functions in Python: Basics to Advanced
Python Control Structures: if, for, while
Python Data Types and Variables Explained
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