Python Threading: Producer-Consumer Demo

This project is a simple Python script that demonstrates advanced, low-level threading synchronization using threading.Condition.

It solves the classic "Producer-Consumer" problem:

1. 5 Consumer Threads (waiter) start first. They want to get a password from a shared list, but the list is empty. They go to sleep and wait() for a signal.
2. 1 Producer Thread (the main thread) then asks the user for a password (it "produces" data).
3. After getting a password, it adds it to the shared list and sends a notify() signal.
4. This signal wakes up one of the sleeping threads, which can now safely "consume" the password from the list before going back to sleep.

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Skills Demonstrated

This script is a technical demonstration of advanced computer science concepts:

• Multithreading: Running multiple threads of execution concurrently.
• Synchronization: Using a threading.Condition object to prevent a "race condition" (where multiple threads might try to access the empty list at the same time).
• Signaling: Using cond.wait() to pause threads and cond.notify() to wake them up efficiently, ensuring the program doesn't waste CPU cycles.
• Resource Locking: The cond.acquire() and cond.release() (which are part of the Condition object) ensure that only one thread can modify the shared list at any given moment.

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How to Run

1. Download the main.py file.
2. Run it using Python 3:

python3 main.py

The program will immediately start 5 "waiter" threads (which will go to sleep) and then prompt you for a password. Each time you enter a password and press Enter, one of the waiting threads will wake up and print it.