Add Codes & ReadMe file ...

Author: aminzayer

MostCommonPythonCodes.py

@@ -0,0 +1,292 @@
+# ----------------------------------------------------------------------
+# Reading and Writing Files:
+
+# Reading a file
+with open('file.txt', 'r') as file:
+    content = file.read()
+
+# Writing to a file
+with open('file.txt', 'w') as file:
+    file.write('New content')
+
+# ----------------------------------------------------------------------
+iterable =[]
+#for Loop:
+for item in iterable:
+    # Code to be executed
+    pass
+
+# ----------------------------------------------------------------------
+condition = True
+# if Statement:
+if condition:
+    # Code to be executed if the condition is true
+    pass
+
+# ----------------------------------------------------------------------
+# Defining a Function:
+def my_function(parameter1, parameter2):
+    # Function code
+    return result
+
+# ----------------------------------------------------------------------
+# Using Lists:
+my_list = [1, 2, 3, 4, 5]
+
+# ----------------------------------------------------------------------
+#Using Dictionaries:
+my_dict = {'key1': 'value1', 'key2': 'value2'}
+
+# ----------------------------------------------------------------------
+# while Loop:
+while condition:
+    # Code to be executed
+    pass
+
+# ----------------------------------------------------------------------
+#Using Standard Modules:
+import math
+result = math.sqrt(16)
+
+# ----------------------------------------------------------------------
+# List Comprehension:
+squares = [x**2 for x in range(10)]
+
+# ----------------------------------------------------------------------
+# Exception Handling:
+try:
+    # Code that may raise an exception
+    pass
+except Exception as e:
+    # Handling the exception
+    pass
+
+
+# ----------------------------------------------------------------------
+# Working with Strings:
+my_string = "Hello, World!"
+
+# ----------------------------------------------------------------------
+# Using Sets:
+my_set = {1, 2, 3}
+
+# ----------------------------------------------------------------------
+# Using Tuples:
+my_tuple = (1, 2, 3)
+
+# ----------------------------------------------------------------------
+# Getting User Input:
+user_input = input("Enter something: ")
+
+# ----------------------------------------------------------------------
+# Converting Data Types:
+number = int("42")
+
+# ----------------------------------------------------------------------
+# Finding the Length of a List:
+length = len(my_list)
+
+# ----------------------------------------------------------------------
+# Sorting a List:
+sorted_list = sorted(my_list)
+
+# ----------------------------------------------------------------------
+# Appending to a List:
+my_list.append(6)
+
+# ----------------------------------------------------------------------
+# Removing an Item from a List:
+my_list.remove(3)
+
+# ----------------------------------------------------------------------
+# Checking Membership in a List:
+if item in my_list:
+    # Code to handle membership
+    pass
+
+# ----------------------------------------------------------------------
+# Creating a Dictionary:
+my_dict = dict(key1='value1', key2='value2')
+
+# ----------------------------------------------------------------------
+# Accessing Dictionary Values:
+value = my_dict['key1']
+
+# ----------------------------------------------------------------------
+# Updating Dictionary Values:
+my_dict['key1'] = 'new_value'
+
+# ----------------------------------------------------------------------
+# Deleting Dictionary Items:
+del my_dict['key1']
+
+# ----------------------------------------------------------------------
+# Checking Dictionary Keys:
+if 'key1' in my_dict:
+    # Code to handle key existence
+    pass
+
+# ----------------------------------------------------------------------
+# Using enumerate with Lists:
+for index, item in enumerate(my_list):
+    # Code using index and item
+    pass
+
+# ----------------------------------------------------------------------
+# Using zip to Combine Lists:
+list1,list2 = []
+combined = list(zip(list1, list2))
+
+# ----------------------------------------------------------------------
+# Creating a Function with Default Arguments:
+def greet(name="Guest"):
+    # Function code
+    pass
+
+# ----------------------------------------------------------------------
+# Using the range Function:
+for i in range(5):
+    # Code that runs 5 times
+    pass
+
+# ----------------------------------------------------------------------
+# String Formatting with f-strings:
+name = "Alice"
+greeting = f"Hello, {name}!"
+
+
+# ----------------------------------------------------------------------
+# Using the in Operator with Strings:
+if "substring" in my_string:
+    # Code to handle substring presence
+    pass
+
+# ----------------------------------------------------------------------
+# Checking for None:
+my_variable = None
+if my_variable is None:
+    # Code to handle None
+    pass
+
+
+# ----------------------------------------------------------------------
+# Creating and Using Classes:
+class MyClass:
+    def __init__(self):
+        # Constructor code
+        pass
+
+    def my_method(self):
+        # Method code
+        pass
+    
+
+# ----------------------------------------------------------------------
+# Working with Dates and Times:
+from datetime import datetime
+now = datetime.now()
+
+# ----------------------------------------------------------------------
+# Using map to Apply a Function to a List:
+doubled = list(map(lambda x: x * 2, my_list))
+
+# ----------------------------------------------------------------------
+# Using filter to Filter a List:
+even_numbers = list(filter(lambda x: x % 2 == 0, my_list))
+
+# ----------------------------------------------------------------------
+# Creating a List of Unique Values:
+unique_values = list(set(my_list))
+
+# ----------------------------------------------------------------------
+# Handling Keyboard Interrupt (Ctrl+C):
+try:
+    while True:
+        # Code that runs indefinitely
+        pass
+except KeyboardInterrupt:
+    # Code to handle Ctrl+C
+    pass
+
+# ----------------------------------------------------------------------
+# Working with JSON Data:
+import json
+json_string = '{"key": "value"}'
+data = json.loads(json_string)
+
+# ----------------------------------------------------------------------
+# Using itertools for Iteration:
+from itertools import combinations
+combos = combinations(my_list, 2)
+
+# ----------------------------------------------------------------------
+# Creating a Virtual Environment:
+"""
+shell command
+
+python -m venv myenv
+"""
+
+# ----------------------------------------------------------------------
+# Activating a Virtual Environment:
+"""
+shell command
+
+source myenv/bin/activate  # On Unix/Linux
+myenv\Scripts\activate    # On Windows
+"""
+
+# ----------------------------------------------------------------------
+# Installing Packages with pip:
+
+"""
+shell command
+
+pip install package_name
+"""
+
+# ----------------------------------------------------------------------
+# Using a try...except Block with File Operations:
+try:
+    with open('file.txt', 'r') as file:
+        content = file.read()
+except FileNotFoundError:
+    # Handle file not found
+    pass
+
+# ----------------------------------------------------------------------
+# Working with Command-Line Arguments:
+import sys
+arg1 = sys.argv[1]
+
+
+# ----------------------------------------------------------------------
+# Using defaultdict for Default Values in Dictionaries:
+from collections import defaultdict
+my_dict = defaultdict(int)
+
+# ----------------------------------------------------------------------
+# Reading CSV Files with csv Module:
+import csv
+with open('data.csv', newline='') as csvfile:
+    csvreader = csv.reader(csvfile)
+    for row in csvreader:
+        # Process rows
+        pass
+
+# ----------------------------------------------------------------------
+# Using Regular Expressions:
+import re
+pattern = r'\d+'
+result = re.findall(pattern, my_string)
+
+# ----------------------------------------------------------------------
+# Creating and Using Generators:
+def my_generator():
+    yield 1
+    yield 2
+
+# ----------------------------------------------------------------------
+# Using os Module for File Operations:
+import os
+file_exists = os.path.exists('file.txt')