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.
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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

16.

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.
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34.
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35.
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36.
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37.
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39.
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40.
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50.
!50