Python Application Case

Python Workshop @ Kongkow IT 2018

Transcript

1. PYTHON WORKSHOP HAFIZHAN: WEB APPLICATION WITH PYTHON FLASK VICKY: PYTHON 101 AND APPLICATION IN SECURITY & MACHINE LEARNING
2. Workshop repo github.com/vickydasta/kongkow-python
3. About • Student @ physics dept. UR • Research assistant at photonic lab @ UR • Research interest: photonic, applied machine learning on raspberry pi system • Python user 2014-now
4. Python at a glance • Multipurpose • OOP (everything is object) • Dynamic typing • Batteries included • Case sensitive
6. Things we can build computer vision search engine security tools embedded system web services web application machine learning apps
7. Your First Python Code print “hello, world!” print(“hello, world!”)
8. Data Structure • Integer • Float • List • String • Boolean • Dictionary • Tupple
9. Data Structure: list • Create an empty list • Add an item into it • Access item • Remove some item fr = [] fr.append(“guava”) fr[0] fr.remove(“guava”)
10. Data Structure: tupple • Immutable array • Data are read-only • Items in tupple can’t be deleted • Can’t add more data once it’s created fixed_data = (1, 2) fixed_data[0] # 1 fixed_data[0] = 1
11. Data Structure: dict • Named-list • Key-value user = {“name” “vicky”, “age”: 21} user[“name”] user.keys() user.values() user = {name=“vicky”, age=21}
12. Control Flow In Python, there are: • if • elif • else • for • while • continue • break
13. Control Flow: if if 1 > 0: print “1 larger than 0”
14. Control Flow: if-else if 1 > 2: print “hola” else: print “holi”
15. Control Flow: if-elif-else if 1 > 2: print “hola” elif 1 > 3: print “holu” else: print “holi”
16. Loop: for • for loop is for iterating over iterable object • range function creates list which is iterable • in above case, the i is 0, 1, 2, ..., 99 on each iteration for i in range(100): print(i)
17. Looping: while • while Requires a condition in order to start or terminate the loop (while-break) while True: print “hello!” N = 0 while N < 10: N += 1
18. Function: def • def is the keyword for creating function def gravity_force(M, m, r): return 6.62e+12*(M*m)/r**2 Function keyword Returned value(s) arguments function name
19. Coding style in Python • Python uses indentation • 3 spaces or 1 tab for each scope • No brackets or semicolons!
20. Python Application Case: Machine Learning Security
21. Machine Learning: Security: Predict land price by its size Port scanner
22. Sec: Port scanner • Door knocking analogy • Bruteforce
23. ML: Linear Regression • Linear model out = mx+b • Scikit learn search for the m • so the predicted value can be close to y
24. ML: Datasets X (M2) Y ($ USD) 200 2000 250 3500 300 5000 378 5400 456 6500 680 8700 800 10000
25. ML: model training datasets model f(x)
26. ML: prediction new input predicted output Trained Model
27. ML: scikit-learn • Machine learning is difficult problem • Fortunately, we have scikit-learn
28. Python resources • github.com/vinta/awesome-python