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我想創建一個程序，生成一個隨機系列的數學符號（+， - 等）和一個變量，然後寫它然後對每個數學運算進行測試，看看它能夠如何解決數學問題 - 根據其性能對其進行評分，然後根據其性能對5個「子」文件進行變異。ValueError：在關閉的文件上的I/O操作（文件不應該關閉）
當試圖運行下面的代碼，它可以通過while循環就好了第一次運行，但每次經過它不會工作和時間拋出這個錯誤：
Traceback (most recent call last):
File "C:\Python Files\Evolving\mEvolve.py", line 97, in <module>
sList.append(scoreFile(f, lFile))
File "C:\Python Files\Evolving\mEvolve.py", line 22, in scoreFile
file.seek(0)
ValueError: I/O operation on closed file
這是代碼我試圖運行：
# Main code
lFile = open('eLog.txt', mode='w') # Log file for logging events
bFile = open('ops.txt', mode='w+') # Starting 'parent' file to modify
lFile.write("Started evolution. New file 'ops.txt' created.")
r = pseudoRandom(1, 5)
for i in range(r): # Write a random amount of data to file
bFile.write(genAtom())
lFile.write("\nWrote %d characters into file 'ops.txt' to start." % r)
while True:
sList = [] # Empty the temporary score list
for i in range(pseudoRandom(1, 5)): # Generate between 1 and 5 'mutated' files.
genCount = genCount + 1
bFile.seek(0)
fContent = list(bFile.read()) # Get parent file content
nContent = mutate(fContent, lFile, pseudoRandom(1, 5)) # Mutate file content
fName = "ops[%d].txt" % genCount
nFile = open(fName, mode='w+') # Open new 'child' file
nFile.write(''.join(nContent)) # and write mutated content to it
fList.append(nFile)
bFile.close() # Close old parent file
remove(bFile.name) # and remove it
for f in fList: # Score all child files
sList.append(scoreFile(f, lFile)) # <-- Error occurs here
bFile = fList[sList.index(min(sList))] # Choose new best file based on scores
lFile.write("\nScored %d files. Best score %d." % (len(sList), min(sList)))
scoreList.append(min(sList))
del fList[sList.index(min(sList))] # Remove best scoring child file from fList
for f in fList: # and delete all other child files
f.close()
remove(f.name)
c = input("Finished, loop again? (Leave blank for yes or n for no): ")
if c.lower() == 'n':
break
及相關scoreFile功能：
def scoreFile(file, log): # Score provided file
optPos = 0
curPos = 10
s = 1
file.seek(0)
fileList = list(file.read())
fileRes = ' '.join(str(e) for e in fileList) # Translate file data
try: # and test to see if its contents can solve a problem
scr = abs(optPos-eval("curPos = curPos %s" % fileRes))
except: # Give it terrible score if it doesn't make sense
scr = 1000
log.write("\nFile '%s' scored %d." % (file.name, scr))
return scr
Mutat E類功能：
def mutate(fileCont, log, lCount): # Mutate the file provided
for i in range(lCount): # a certain amount of times
try:
actionLoc = pseudoRandom(0, len(fileCont)-1) # Pick a random part of file content to mess with
except: # File content was under two characters (results in asking for between 0 and 0)
actionLoc = 0 # so just set it to 0
action = pseudoRandom(0, 2)
if action == 0: # Replace
newItem = genAtom() # Generate new 'atom' of code to replace with
try:
fileCont[actionLoc] = newItem
log.write("\nMutated: Replaced atom %d." % actionLoc)
except: # Chosen content doesn't exist (file was likely empty)
fileCont.insert(actionLoc, newItem)
log.write("\nMutated: Attempted atom replacement failed;")
log.write("\ninserted new random atom instead for atom %d." % actionLoc)
elif action == 1: # Delete
try:
del fileCont[actionLoc]
log.write("\nMutated: Deleted atom %d." % actionLoc)
except: # Chosen content doesn't exist (file was likely empty)
newItem = genAtom()
fileCont.insert(actionLoc, newItem)
log.write("\nMutated: Attempted atom deletion failed;")
log.write("\ninserted new random atom instead for atom %d." % actionLoc)
else: # Duplicate
try: # Take the content and insert a duplicate
newItem = fileCont[actionLoc]
fileCont.insert(actionLoc, newItem)
log.write("\nMutated: Duplicated atom %d." % actionLoc)
except: # Chosen content doesn't exist (file was likely empty)
newItem = genAtom()
fileCont.insert(actionLoc, newItem)
log.write("\nMutated: Attempted atom duplication failed;")
log.write("\ninserted new random atom instead for atom %d." % actionLoc)
return fileCont