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Discussion
- Python Chap 11 컴퓨터의 개념 및 실습
5월 25일
Intelligent Data Systems Lab.
Department of Computer Science & Engineering
Discussion 11-1
 Explain, with examples, the following properties
of Python lists;
1. dynamic
2. heterogeneous
3. mutable
 What about Python strings?
컴퓨터의 개념 및 실습
Discussion 11-2
 What does the following statement do?
data.sort(key=use_gpa)
 What type should the input parameter of the
function use_gpa take?
컴퓨터의 개념 및 실습
Discussion 11-3
 What are the benefits of using lists for
managing the pips in the dice (DieView)?
onTable = [ [], [3], [2,4], [2,3,4], [0,2,4,6],
[0,2,3,4,6], [0,1,2,4,5,6] ]
for pip in self.pips:
pip.setFill(self.background)
on = onTable[value]
for i in on:
self.pips[i].setFill(self.foreground)
컴퓨터의 개념 및 실습
# turn correct pips on
if value == 1:
self.pip4.setFill(self.foreground)
elif value == 2:
self.pip1.setFill(self.foreground)
self.pip7.setFill(self.foreground)
elif value == 3:
self.pip1.setFill(self.foreground)
self.pip7.setFill(self.foreground)
self.pip4.setFill(self.foreground)
elif value == 4:
self.pip1.setFill(self.foreground)
self.pip3.setFill(self.foreground)
self.pip5.setFill(self.foreground)
self.pip7.setFill(self.foreground)
elif value == 5:
self.pip1.setFill(self.foreground)
self.pip3.setFill(self.foreground)
self.pip4.setFill(self.foreground)
self.pip5.setFill(self.foreground)
self.pip7.setFill(self.foreground)
else:
self.pip1.setFill(self.foreground)
self.pip2.setFill(self.foreground)
self.pip3.setFill(self.foreground)
self.pip5.setFill(self.foreground)
self.pip6.setFill(self.foreground)
self.pip7.setFill(self.foreground)
컴퓨터의 개념 및 실습
Chapter 10 - 5
Discussion 11-4
 How would you represent and manipulate a two
dimensional matrix of size 2 X 3?
>>> A = [ [2, 1], [-4, 3], [2, -2] ]
>>> A
[[2, 1], [-4, 3], [2, -2]]
>>> A[1]
[-4, 3]
>>> A[1, 1]
>>> A[1][1]
3
>>> for i in range(3):
for j in range(2):
print(A[i][j], end=' ')
2 1 -4 3 2 -2
>>> for row in A:
for e in row:
print(A[i][j], end=' ')
Traceback (most recent call last):
File "<pyshell#54>", line 1, in <module>
A[1,1]
TypeError: list indices must be integers, not tuple
컴퓨터의 개념 및 실습
Discussion 11-5
 How would you two matrices of size 2 X 3?
>>> A = [ [2, 1], [-4, 3], [2, -2] ]
>>> B = [ [0, 2], [1, -3], [3, -2] ]
>>> C[0] = A[0]
Traceback (most recent call last):
File "<pyshell#60>", line 1, in <module>
C[0] = A[0]
NameError: name 'C' is not defined
>>> C = [ [0, 0], [0, 0], [0, 0] ]
>>> for i in range(3):
for j in range(2):
C[i][j] = A[i][j]+B[i][j]
>>> C
[[2, 3], [-3, 0], [5, -4]]
컴퓨터의 개념 및 실습