1. 1

2. !2

3. !3

4. !4

5. "Python has arguably become the de facto
standard for exploratory, interactive, and
computation-driven scientific research”
!5

6. !6

7. !7

8.
!8

9. !9

10. •L[i, j, k]
•L[1:2, ..., 2:3]
L[i][j][k] L[i,j,k]
!10

11. A = A*2
A *= 2
!11

12. >>> y = (x >= 0.5)
>>> y
array([ True, False, False, True, False])
>>> z[y]
array([0.23273493, 0.99925692, 0.85635559])
!12

13. >>> A =[1, 2, 3]
>>> A[1]
2
>>> A[np.int64(1)]
2
!13

14. !14

15. A @ B
np.matmul(A, B)
!15

17. Stack Overflow Trends
!17

18. !18

19. !19

20. !20

21. from concurrent.futures import *
def fib(n):
if n < 2:
return n
return fib(n-2) + fib(n-1)
with ProcessPoolExecutor() as e:
fibs = e.map(fib, range(10))
for v in fibs:
print(v)
!21

22. !22

23. !23

24. def func(n):
s = 0
for i in range(n): s += i
with ThreadPoolExecutor() as e:
e.map(func, range(3))
!24

25. ⇛
⇛
!25

26. def func():
while True:
s = 0
for i in range(n): s += i
print(s)
!26

27. !27

28. • 10*10, 100*100 40000
• 1000*1000 400
• 1~9
!28

29. !29

30. !30

31. !31

32. • 10*10, 100*100, 1000*1000
200
• 1~9
!32

33. !33

34. !34

35. !35

36. !36

37. !37

38. !38

39. !39

40. !40

41.
!41

42.
!42

43. !43

44. !44

45. !45

46. !46

47. !47

48. !48

49. !49

50. !50