Python History and Basics with practical example

Python History and Basics with practical example

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  04/22/2025 HISTORY  History  Python,a popular high-level, general-purpose programming language, was conceived in the late 1980s and implemented by Guido van Rossum in 1989, with its first release in 1991.  Origins (Late 1980s - 1991):  Guido van Rossum, a Dutch programmer at CWI (Centrum Wiskunde & Informatica) in the Netherlands, began working on Python as a successor to the ABC programming language, aiming for a language that was more readable and easier to use.
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  04/22/2025 HISTORY  History  FirstRelease (1991):  Python 0.9.0 was released in February 1991, and the language was designed to be easy to learn and use, with a focus on code readability.  Python 1.0 (1994):  The first major release, Python 1.0, introduced features like functional programming tools, keyword arguments, and support for complex numbers.  Python 2.0 (2000):  This version introduced significant features like list comprehensions, cycle-detecting garbage collection, reference counting, and Unicode support.  Python 3.0 (2008):  Python 3.0 introduced major changes, including a new syntax and a focus on removing redundant features, but it was not backward- compatible with earlier versions.
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  04/22/2025 THE IMPORTANCE OFBEING EARNEST (TIOBE) The TIOBE Programming Community index is an indicator of the popularity of programming languages. Python’s Popularity & Applications
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  04/22/2025 PYTHON’S POPULARITY &APPLICATIONS  TIOBE Rank: #1 (as of 2023)  Applications:  Web Dev: Django, Flask  Data Science: Pandas, NumPy  AI/ML: TensorFlow, PyTorch.
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  04/22/2025 PYTHON 2 VS.PYTHON 3  Python 2 vs. Python 3  Key Differences:  Why Python 3?  Better syntax and future support. print "Hello" (Python 2) → print("Hello") (Python 3) Integer division: 3/2 = 1 (Python 2) → 1.5 (Python 3)
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  04/22/2025 BASIC CONCEPTS  Variables:Containers for data: name = "Alice" # str age = 25 # int height = 5.9 # float is_student = True # bool
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  04/22/2025 OPERATIONS: sum = 10+ 3.5 # float greeting = "Hello, " + name # String concatenation
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  04/22/2025 INTRODUCING IDLE
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  04/22/2025 INTRODUCING IDLE Open IDLE→ Type print("Hello, Python!") → Press Enter. Create a new file (File > New), save as hello.py, and run (F5).  Python’s built-in IDE (Interactive Development Environment).  Features:  Code editor with syntax highlighting.  Interactive shell for quick testing.  Features:
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  04/22/2025 INTRODUCING IDLE Open IDLE→ Type print("Hello, Python!") → Press Enter. Create a new file (File > New), save as hello.py, and run (F5). F5
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  04/22/2025 INTRODUCING IDLE radius =5 area = 3.1415 * radius ** 2 print(f"Area: {area}")
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  04/22/2025 TASKS  Task 1:Hello, World! Show the result  Task 2: Variable Declaration Show the result  Task 3: Arithmetic Operations Show the result  Task 4: Calculate Circle Area  Task 5: Debugging Practice: fix error message = "Python is fun" print(mesage) # Intentional typo  Task 6: IDLE Interactive Shell  Type 5 + 7 and press Enter.  Screenshot: Show the result (12).  Task 7: Create and Run a Script
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  04/22/2025 PROGRAM ERRORS The programis not doing what you expect it to do.