The document discusses data file handling in Python. It covers the basics of opening, reading from, and writing to both text and binary files.
The key points covered include: opening and closing files, different file access modes, reading methods like readline(), readlines(), and read(), writing methods like write() and writelines(), random access methods like seek() and tell(), pickling and unpickling using the pickle module, and the differences between text and binary files.
The document provides information about file handling in Python. It discusses the basic operations on files like opening, reading, writing and closing files. It explains text files and binary files, different file access modes, and methods to read and write data from/to files like readline(), readlines(), read(), write() and writelines(). It also covers random access methods like seek() and tell() as well as pickling and unpickling using the pickle module. Finally, it highlights the differences between text and binary files.
This document provides an overview of file handling in Python. It discusses different file types like text files, binary files, and CSV files. It explains how to open, read, write, close, and delete files using functions like open(), read(), write(), close(), and os.remove(). It also covers reading and writing specific parts of a file using readline(), readlines(), seek(), and tell(). The document demonstrates how to handle binary files using pickle for serialization and deserialization. Finally, it shows how the os module can be used for file operations and how the csv module facilitates reading and writing CSV files.
This document discusses files, modules, packages and exceptions in Python. It covers reading and writing to text files, opening and closing files, different file access modes, file positions, command line arguments, and common exceptions in Python like syntax errors and exceptions raised during execution. Key topics include using open(), read(), write(), close() functions to perform file operations, os and os.path modules for file and path operations, and sys.argv to access command line arguments in a Python program. Examples are provided for reading, writing, appending files and handling exceptions.
This document provides an overview of file handling in Python. It begins by outlining learning objectives related to understanding different file types, opening and closing files, and reading from and writing to files. It then discusses the need for data file handling to permanently store program data. Various file types are introduced, including text files, CSV files, and binary files. Methods for opening, reading from, writing to, and closing both text and binary files are described. The pickle module is explained for pickling and unpickling Python objects for storage in binary files. Finally, random access methods like tell() and seek() are briefly covered.
The document discusses file handling in Python. It covers opening and closing files, reading and writing to files, and different file access modes. It describes opening files using the open() function and closing files using the close() method. It explains how to read from files using methods like read(), readline(), and readlines(). It also covers writing to files using write(), writelines(), and seeking to specific positions using seek() and tell(). The document provides examples of reading, writing, and manipulating text files in Python.
This document discusses Python's built-in functions and methods for performing input/output operations (I/O) and manipulating files and directories. It covers printing to the screen, reading keyboard input, opening and closing files, reading and writing files, file positions, renaming and deleting files, and creating, removing, and changing directories.
File handling and Dictionaries in pythonnitamhaske
This document provides an introduction to file handling and dictionaries in Python. It discusses what files are and how they are used to store large amounts of data outside of RAM. Files are organized in a tree structure with paths to identify locations. There are two main types of files - text files which store character data and binary files which can store any type of data. The document outlines various functions for working with files, including open() to create a file object, close() to finish with the file, and attributes of the file object like name and mode. It also covers accessing a file, reading/writing data, and different modes for opening files.
File handling in Python allows programs to work with files stored on disk by performing operations like opening, reading, writing, and modifying files. The open() function is used to open a file and return a file object, which can then be used to read or write to the file. There are different file access modes like 'r' for read-only, 'w' for write-only, and 'a' for append. Common methods for reading files include read() to read characters, readline() to read one line, and readlines() to read all lines into a list. Files can be written to using write() and writelines() methods and deleted using functions in the os, shutil, or pathlib modules.
The document discusses Python's built-in functions and methods for reading, writing, and manipulating files and directories. It explains how to open and close files, read and write file contents, check file positions, rename and delete files, create and remove directories, and get the current working directory using functions like open(), close(), read(), write(), tell(), seek(), os.rename(), os.remove(), os.mkdir(), os.chdir(), and os.getcwd(). It also covers the different modes for opening files and lists attributes of file objects.
This document discusses file operations in Python. It defines what a file is and explains that files are used to permanently store data on storage devices like hard disks. It describes the basic file operations of opening, reading, writing, and closing files. It also discusses text and binary file types and how to rename, delete, and get attribute information about files in Python.
This document discusses file handling in Python. File handling allows Python programs to read from and write data to disk files for permanent storage. The open() function is used to open a file and return a file object, which has methods like read(), write(), close() to interact with the file. Files can be opened in different modes like read, write, append. The read() method reads from the file while write() writes to it. Files must be closed using close() after processing to flush buffers and close the file properly.
File handling is a key concept in programming that allows a program to create, open, read, write, and delete files on a storage device. It provides a way to store data permanently, even after the program execution ends, which is essential for managing data in applications.
Key Operations in File Handling
1. Creating Files: Files can be created in various modes (like text or binary) to store data. For example, in Python, the open() function with mode "w" (write mode) can create a new file.
2. Opening Files: Files can be opened in different modes:
• "r" (read): Opens an existing file for reading.
• "w" (write): Opens a file for writing, creates it if it doesn’t exist, and truncates it if it does.
• "a" (append): Opens a file for appending data at the end.
• "r+", "w+", and "a+": Variants that allow reading and writing together.
3. Reading Files: Content can be read using functions like read(), readline(), or readlines(). This helps to retrieve data from a file and process it within the program.
4. Writing to Files: The write() function adds content to a file. The mode chosen affects whether the content overwrites existing data or appends to it.
5. Closing Files: Closing files after reading or writing is essential as it frees system resources and ensures data is saved correctly.
6. File Deletion: Files can also be deleted if they are no longer needed, using commands like remove() in Python (from the os module).
Example Code in Python
Here’s a simple Python example showing basic file handling operations:
# Creating and writing to a file
with open("example.txt", "w") as file:
file.write("Hello, this is a sample text file.\n")
# Reading from the file
with open("example.txt", "r") as file:
content = file.read()
print(content)
Applications of File Handling
File handling is essential for many applications, such as:
• Data Storage: Persisting data, like saving user settings or logging information.
• File-Based Database: For lightweight applications, files can serve as a basic database.
• Data Processing: Reading data from files for analysis or processing.
• Configuration Files: Loading application configuration settings at runtime.
By understanding file handling, you can manage data effectively, making your programs more versatile and data-driven.
The document discusses file input/output in Python including:
1) Accessing keyboard input using input() and raw_input() functions;
2) Printing to the screen using the print() function;
3) Opening, reading, and writing to files using functions like open(), read(), write(), close();
4) Different file modes for reading, writing, appending text and binary files.
Here are the answers to the quiz questions:
1. def read_file(file_name):
lines = []
with open(file_name, 'r') as f:
for line in f:
lines.append(line)
return lines
2. def input_list():
n = int(input("Enter number of elements : "))
list1 = []
for i in range(0, n):
ele = float(input())
list1.append(ele)
return list1
def output_list(list1):
for i in list1:
print(i)
3. def display_file(filename):
with open(filename
The document discusses files in Python. It describes that files allow storing data permanently on disk that can be accessed by Python programs. There are two main types of files - text files, which store data as characters, and binary files, which store data in the same format as memory. The document outlines various methods for opening, reading, writing, and closing files in Python. It also discusses file paths and different file access modes.
This document provides an overview of file handling in Python. It begins by outlining learning objectives related to understanding different file types, opening and closing files, and reading from and writing to files. It then discusses the need for data file handling to permanently store program data. Various file types are introduced, including text files, CSV files, and binary files. Methods for opening, reading from, writing to, and closing both text and binary files are described. The pickle module is explained for pickling and unpickling Python objects for storage in binary files. Finally, random access methods like tell() and seek() are briefly covered.
The document discusses file handling in Python. It covers opening and closing files, reading and writing to files, and different file access modes. It describes opening files using the open() function and closing files using the close() method. It explains how to read from files using methods like read(), readline(), and readlines(). It also covers writing to files using write(), writelines(), and seeking to specific positions using seek() and tell(). The document provides examples of reading, writing, and manipulating text files in Python.
This document discusses Python's built-in functions and methods for performing input/output operations (I/O) and manipulating files and directories. It covers printing to the screen, reading keyboard input, opening and closing files, reading and writing files, file positions, renaming and deleting files, and creating, removing, and changing directories.
File handling and Dictionaries in pythonnitamhaske
This document provides an introduction to file handling and dictionaries in Python. It discusses what files are and how they are used to store large amounts of data outside of RAM. Files are organized in a tree structure with paths to identify locations. There are two main types of files - text files which store character data and binary files which can store any type of data. The document outlines various functions for working with files, including open() to create a file object, close() to finish with the file, and attributes of the file object like name and mode. It also covers accessing a file, reading/writing data, and different modes for opening files.
File handling in Python allows programs to work with files stored on disk by performing operations like opening, reading, writing, and modifying files. The open() function is used to open a file and return a file object, which can then be used to read or write to the file. There are different file access modes like 'r' for read-only, 'w' for write-only, and 'a' for append. Common methods for reading files include read() to read characters, readline() to read one line, and readlines() to read all lines into a list. Files can be written to using write() and writelines() methods and deleted using functions in the os, shutil, or pathlib modules.
The document discusses Python's built-in functions and methods for reading, writing, and manipulating files and directories. It explains how to open and close files, read and write file contents, check file positions, rename and delete files, create and remove directories, and get the current working directory using functions like open(), close(), read(), write(), tell(), seek(), os.rename(), os.remove(), os.mkdir(), os.chdir(), and os.getcwd(). It also covers the different modes for opening files and lists attributes of file objects.
This document discusses file operations in Python. It defines what a file is and explains that files are used to permanently store data on storage devices like hard disks. It describes the basic file operations of opening, reading, writing, and closing files. It also discusses text and binary file types and how to rename, delete, and get attribute information about files in Python.
This document discusses file handling in Python. File handling allows Python programs to read from and write data to disk files for permanent storage. The open() function is used to open a file and return a file object, which has methods like read(), write(), close() to interact with the file. Files can be opened in different modes like read, write, append. The read() method reads from the file while write() writes to it. Files must be closed using close() after processing to flush buffers and close the file properly.
File handling is a key concept in programming that allows a program to create, open, read, write, and delete files on a storage device. It provides a way to store data permanently, even after the program execution ends, which is essential for managing data in applications.
Key Operations in File Handling
1. Creating Files: Files can be created in various modes (like text or binary) to store data. For example, in Python, the open() function with mode "w" (write mode) can create a new file.
2. Opening Files: Files can be opened in different modes:
• "r" (read): Opens an existing file for reading.
• "w" (write): Opens a file for writing, creates it if it doesn’t exist, and truncates it if it does.
• "a" (append): Opens a file for appending data at the end.
• "r+", "w+", and "a+": Variants that allow reading and writing together.
3. Reading Files: Content can be read using functions like read(), readline(), or readlines(). This helps to retrieve data from a file and process it within the program.
4. Writing to Files: The write() function adds content to a file. The mode chosen affects whether the content overwrites existing data or appends to it.
5. Closing Files: Closing files after reading or writing is essential as it frees system resources and ensures data is saved correctly.
6. File Deletion: Files can also be deleted if they are no longer needed, using commands like remove() in Python (from the os module).
Example Code in Python
Here’s a simple Python example showing basic file handling operations:
# Creating and writing to a file
with open("example.txt", "w") as file:
file.write("Hello, this is a sample text file.\n")
# Reading from the file
with open("example.txt", "r") as file:
content = file.read()
print(content)
Applications of File Handling
File handling is essential for many applications, such as:
• Data Storage: Persisting data, like saving user settings or logging information.
• File-Based Database: For lightweight applications, files can serve as a basic database.
• Data Processing: Reading data from files for analysis or processing.
• Configuration Files: Loading application configuration settings at runtime.
By understanding file handling, you can manage data effectively, making your programs more versatile and data-driven.
The document discusses file input/output in Python including:
1) Accessing keyboard input using input() and raw_input() functions;
2) Printing to the screen using the print() function;
3) Opening, reading, and writing to files using functions like open(), read(), write(), close();
4) Different file modes for reading, writing, appending text and binary files.
Here are the answers to the quiz questions:
1. def read_file(file_name):
lines = []
with open(file_name, 'r') as f:
for line in f:
lines.append(line)
return lines
2. def input_list():
n = int(input("Enter number of elements : "))
list1 = []
for i in range(0, n):
ele = float(input())
list1.append(ele)
return list1
def output_list(list1):
for i in list1:
print(i)
3. def display_file(filename):
with open(filename
The document discusses files in Python. It describes that files allow storing data permanently on disk that can be accessed by Python programs. There are two main types of files - text files, which store data as characters, and binary files, which store data in the same format as memory. The document outlines various methods for opening, reading, writing, and closing files in Python. It also discusses file paths and different file access modes.
This presentation highlights project development using software development life cycle (SDLC) with a major focus on incorporating research in the design phase to develop innovative solution. Some case-studies are also highlighted which makes the reader to understand the different phases with practical examples.
Top Cite Articles- International Journal on Soft Computing, Artificial Intell...ijscai
International Journal on Soft Computing, Artificial Intelligence and Applications (IJSCAI) is an open access peer-reviewed journal that provides an excellent international forum for sharing knowledge and results in theory, methodology and applications of Artificial Intelligence, Soft Computing. The Journal looks for significant contributions to all major fields of the Artificial Intelligence, Soft Computing in theoretical and practical aspects. The aim of the Journal is to provide a platform to the researchers and practitioners from both academia as well as industry to meet and share cutting-edge development in the field.
11th International Conference on Data Mining (DaMi 2025)kjim477n
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Contact Us : Here's where you can reach us : [email protected] or [email protected]
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This document provides information about the Fifth edition of the magazine "Sthapatya" published by the Association of Civil Engineers (Practicing) Aurangabad. It includes messages from current and past presidents of ACEP, memories and photos from past ACEP events, information on life time achievement awards given by ACEP, and a technical article on concrete maintenance, repairs and strengthening. The document highlights activities of ACEP and provides a technical educational article for members.
本資料「To CoT or not to CoT?」では、大規模言語モデルにおけるChain of Thought（CoT）プロンプトの効果について詳しく解説しています。
CoTはあらゆるタスクに効く万能な手法ではなく、特に数学的・論理的・アルゴリズム的な推論を伴う課題で高い効果を発揮することが実験から示されています。
一方で、常識や一般知識を問う問題に対しては効果が限定的であることも明らかになりました。
複雑な問題を段階的に分解・実行する「計画と実行」のプロセスにおいて、CoTの強みが活かされる点も注目ポイントです。
This presentation explores when Chain of Thought (CoT) prompting is truly effective in large language models.
The findings show that CoT significantly improves performance on tasks involving mathematical or logical reasoning, while its impact is limited on general knowledge or commonsense tasks.
A substation at an airport is a vital infrastructure component that ensures reliable and efficient power distribution for all airport operations. It acts as a crucial link, converting high-voltage electricity from the main grid to the lower voltages needed for various airport facilities. This essay will explore the functions, components, and importance of a substation at an airport.
Functions of an Airport Substation:
Voltage Conversion:
Substations step down high-voltage electricity to lower levels suitable for airport operations, like terminal buildings, runways, and other facilities.
Power Distribution:
They distribute electricity to various loads, including lighting, air conditioning, navigation systems, and ground support equipment.
Grid Stability:
Substations help maintain the stability of the power grid by controlling voltage levels and managing power flows.
Redundancy and Reliability:
Airports often have redundant substations or interconnected systems to ensure uninterrupted power supply, even in case of a fault.
Switching and Control:
Substations provide switching capabilities to connect or disconnect circuits, enabling maintenance and power management.
Protection:
Substations incorporate protective devices, like circuit breakers and relays, to safeguard the power system from faults and ensure safe operation.
Key Components of an Airport Substation:
Transformers: These convert high-voltage electricity to lower voltage levels.
Circuit Breakers: These devices switch circuits on or off, protecting the system from faults.
Busbars: These are large, conductive bars that distribute electricity from transformers to other equipment.
Switchgear: This includes equipment that controls the flow of electricity, such as isolators and switches.
Control and Protection Systems: These systems monitor the substation's performance, detect faults, and automatically initiate corrective actions.
Capacitors: These improve the power factor and reduce losses in the system.
Importance of Airport Substations:
Reliable Power Supply:
Substations are essential for providing reliable power to critical airport functions, ensuring safety and efficiency.
Safe and Efficient Operations:
They contribute to the safe and efficient operation of runways, terminals, and other airport facilities.
Airport Infrastructure:
Substations are an integral part of the airport's infrastructure, enabling various operations and services.
Economic Impact:
Substations support the economic activities of the airport, including passenger and cargo handling.
Modernization and Sustainability:
Modern substations incorporate advanced technologies and systems to improve efficiency, reduce energy consumption, and enhance sustainability.
In conclusion, an airport substation is a crucial component of airport infrastructure, ensuring reliable and efficient power distribution, grid stability, and safe operations.
![6
The Open() Function
Before reading from or writing to a file, you must first open it using Python’s built-in open() function.This
function creates a file object, which will be used to invoke methods associated with it.The syntax of open() is:
fileObj = open(file_name [, access_mode])
Here,
file_name is a string value that specifies name of the file that you want to access.
access_mode indicates the mode in which the file has to be opened, i.e., read, write, append, etc.
© OXFORD UNIVERSITY PRESS 2017.ALL RIGHTS RESERVED.
Example:](https://image.slidesharecdn.com/chapter7filehandling-250508074131-fb6b6c83/85/file_handling_python_bca_computer_python-6-320.jpg)
![12
The read() and readline() Methods
The read() method is used to read a string from an already opened file.As said before, the string can include,
alphabets, numbers, characters or other symbols.The syntax of read() method is fileObj.read([count])
In the above syntax, count is an optional parameter which if passed to the read() method specifies the
number of bytes to be read from the opened file.The read() method starts reading from the beginning of the
file and if count is missing or has a negative value then, it reads the entire contents of the file (i.e., till the end
of file).
The readlines() method is used to read all the lines in the file
© OXFORD UNIVERSITY PRESS 2017.ALL RIGHTS RESERVED.
Example:](https://image.slidesharecdn.com/chapter7filehandling-250508074131-fb6b6c83/85/file_handling_python_bca_computer_python-12-320.jpg)
![© OXFORD UNIVERSITY PRESS 2017.ALL RIGHTS RESERVED. 17
with open("q1.py", 'r') as file1:
with open("new.py", 'w') as file2:
i=0
buf=file1.readline()
while (i<len(buf)):
if "#" in buf[i] :
i=i+1
else:
file2.write(buf[i])
i=i+1
print("copied")](https://image.slidesharecdn.com/chapter7filehandling-250508074131-fb6b6c83/85/file_handling_python_bca_computer_python-17-320.jpg)
![23
File Positions
With every file, the file management system associates a pointer often known as file pointer that facilitate
the movement across the file for reading and/ or writing data.The file pointer specifies a location from where
the current read or write operation is initiated. Once the read/write operation is completed, the pointer is
automatically updated.
Python has various methods that tells or sets the position of the file pointer. For example, the tell() method
tells the current position within the file at which the next read or write operation will occur. It is specified as
number of bytes from the beginning of the file. When you just open a file for reading, the file pointer is
positioned at location 0, which is the beginning of the file.
The seek(offset[, from]) method is used to set the position of the file pointer or in simpler terms, move the
file pointer to a new location.The offset argument indicates the number of bytes to be moved and the from
argument specifies the reference position from where the bytes are to be moved.
© OXFORD UNIVERSITY PRESS 2017.ALL RIGHTS RESERVED.](https://image.slidesharecdn.com/chapter7filehandling-250508074131-fb6b6c83/85/file_handling_python_bca_computer_python-23-320.jpg)
![Présentation_gestion[1] [Autosaved].pptx](https://cdn.slidesharecdn.com/ss_thumbnails/prsentationgestion1autosaved-250608153959-37fabfd3-thumbnail.jpg?width=560&fit=bounds)
