Update README.md

Author: VolkanSah

README.md

@@ -1,2 +1,157 @@
-# usefull-Python-Command-Overview
+# Usefull Python Command Overview
+
 This project serves as a comprehensive guide to executing shell commands and handling files using Python.
+Installation. You can install Python through the official website: https://www.python.org/downloads/
+## Usage
+This project can be used as a reference guide for executing shell commands and file handling in Python.
+Shell Commands with Python
+
+## Install requiments
+```python
+pip install PyPDF2 python-docx pandas beautifulsoup4
+```
+
+This project makes use of Python to execute shell commands. Here are some of the Python commands used in this project:
+
+Creating and writing to a file:
+
+```python
+
+with open("filename.txt", "w") as f:
+    f.write("Hello, World!")
+```
+Reading from a file:
+
+```python
+
+with open("filename.txt", "r") as f:
+    print(f.read())
+```
+Appending to an existing file:
+
+```python
+
+with open("filename.txt", "a") as f:
+    f.write("More text.")
+```
+Deleting a file:
+
+```python
+
+import os
+os.remove("filename.txt")
+```
+Checking if a file exists:
+
+```python
+
+import os
+os.path.exists("filename.txt")
+```
+Creating a directory:
+
+```python
+import os
+os.mkdir("directory_name")
+```
+Large File Handling
+
+Working with large files requires a different set of Python commands. Here are some examples:
+
+Opening a file:
+
+```python
+
+file = open('large_file.txt', 'r')
+```
+Reading a file line by line:
+
+```python
+
+with open('large_file.txt', 'r') as file:
+    for line in file:
+        print(line)
+```
+Reading a specific number of lines:
+
+```python
+
+from itertools import islice
+with open('large_file.txt', 'r') as file:
+    head = list(islice(file, 5))
+```
+Searching within a large file:
+
+```python
+
+with open('large_file.txt', 'r') as file:
+    for line in file:
+        if 'some_text' in line:
+            print(line)
+```
+Writing to a large file:
+
+```python
+
+with open('large_file.txt', 'w') as file:
+    file.write('some_text')
+```
+Splitting files:
+
+```python
+
+chunk_size = 1000000  # 1 MB
+with open('large_file.txt', 'r') as file:
+    chunk = file.read(chunk_size)
+    while chunk:
+        with open('chunk.txt', 'w') as chunk_file:
+            chunk_file.write(chunk)
+        chunk = file.read(chunk_size)
+```
+Handling Specific File Formats
+
+Python can read various file formats using specific libraries. Here are some examples:
+
+Reading PDF files:
+
+```python
+
+import PyPDF2
+
+with open('example.pdf', 'rb') as file:
+    reader = PyPDF2.PdfFileReader(file)
+    page = reader.getPage(0)
+    print(page.extract_text())
+```
+Reading Word documents:
+
+```python
+
+from docx import Document
+
+doc = Document('example.docx')
+for para in doc.paragraphs:
+    print(para.text)
+```
+Reading Excel files:
+
+```python
+
+import pandas as pd
+
+data = pd.read_excel('example.xlsx')
+print(data)
+```
+Reading HTML files:
+
+```python
+
+from bs4 import BeautifulSoup
+
+with open("example.html") as fp:
+    soup = BeautifulSoup(fp, 'html.parser')
+print(soup.prettify())
+```
+Credits
+
+This README was generated with the help of ChatGPT, an AI developed by OpenAI.