python slice类型_我陷入了Python错误类型错误：不可更改类型：“slice”

逃离我推掉我的手 2022-10-31 13:48 159阅读 0赞

from informedSearch import \*

from search import \*

class EightPuzzleProblem(InformedProblemState):

"""

Inherited from the InformedProblemState class. To solve

the eight puzzle problem.

"""

def \_\_init\_\_(self, myList, list = \{\}, operator = None):

self.myList = list

self.operator = operator

def \_\_str\_\_(self):

\#\# Method returns a string representation of the state.

result = ""

if self.operator != None:

result += "Operator: " + self.operator + ""

result += " " + ' '.join(self.myList\[0:3\]) + "\\n"

result += " " + ' '.join(self.myList\[3:6\]) + "\\n"

result += " " + ' '.join(self.myList\[6:9\]) + "\\n"

return result

def illegal(self):

\#\# Tests whether the state is illegal.

if self.myList < 0 or self.myList > 9: return 1

return 0

def equals(self, state):

\#\# Method to determine whether the state instance

\#\# and the given state are equal.

return ' '.join(self.myList) == ' '.join(state.myList)

\#\# The five methods below perform the tree traversing

def move(self, value):

nList = self.myList\[:\] \# make copy of the current state

position = nList.index('P') \# P acts as the key

val = nList.pop(position + value)

nList.insert(position + value, 'P')

nList.pop(position)

nList.insert(position, val)

return nList

def moveleft(self):

n = self.move(-1)

return EightPuzzleProblem(n, "moveleft")

def moveright(self):

n = self.move(1)

return EightPuzzleProblem(n, "moveright")

def moveup(self):

n = self.move(-3)

return EightPuzzleProblem(n, "moveup")

def movedown(self):

n = self.move(+3)

return EightPuzzleProblem(n, "movedown")

def operatorNames(self):

return \["moveleft", "moveright", "moveup", "movedown"\]

def enqueue(self):

q = \[\]

if (self.myList.index('P') != 0) and (self.myList.index('P') != 3) and (self.myList.index('P') != 6):

q.append(self.moveleft())

if (self.myList.index('P') != 2) and (self.myList.index('P') != 5) and (self.myList.index('P') != 8):

q.append(self.moveright())

if self.myList.index('P') >= 3:

q.append(self.moveup())

if self.myList.index('P') >= 5:

q.append(self.movedown())

def applyOperators(self):

return \[self.moveleft(), self.moveright(), self.moveup(), self.movedown()\]

def heuristic():

counter = 0

for i in range(len(self.myList)):

if ((self.myList\[i\] != goal.myList\[i\]) and self.myList\[i\] != 'P'):

\#\# Position of current:

current = goal.myList.index(self.myList\[i\])

if current < 3: goalRow = 0

elif current < 6: goalRow = 1

else: goalRow = 2

if i < 3: initRow = 0

elif i < 6: initRow = 1

else: startRow = 2

initColumn = i % 3

goalColumn = current % 3

counter += (abs(goalColumn - initColumn) + abs(goalRow - initRow))

return counter

\#Uncomment to test the starting states:

init = \['1','3','P','8','2','4','7','6','5'\] \#A

\#init = \['1','3','4','8','6','2','P','7','5'\] \#B

\#init = \['P','1','3','4','2','5','8','7','6'\] \#C

\#init = \['7','1','2','8','P','3','6','5','4'\] \#D

\#init = \['8','1','2','7','P','4','6','5','3'\] \#E

\#init = \['2','6','3','4','P','5','1','8','7'\] \#F

\#init = \['7','3','4','6','1','5','8','P','2'\] \#G

\#init = \['7','4','5','6','P','3','8','1','2'\] \#H

goal = \['1','2','3','8','P','4','7','6','5'\] \#goal state

InformedSearch(EightPuzzleProblem(init), EightPuzzleProblem(goal))

我运行它，它显示错误line 34, in \_\_str\_\_ result += " " + ' '.join(self.myList\[0:3\]) + "\\n"

TypeError: unhashable type: 'slice'

有什么想法吗？

python slice类型_我陷入了Python错误类型错误：不可更改类型：“slice”

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