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我正在将 4 个 CSV 文件读入内存中的 4 个不同对象。前 3 次，它工作....但第四次失败，说： ValueError: I/O operation on closed file

我导入这些：

import sys
import time
import random
import csv
import ast

这是我的代码：

csvPath = "../../../MegaBits-Data/"
ConditionType = "MBConditionType.csv"
SpeciesType = "MBMegaBitSpecies.csv"
StatusType = "MBStatusEffect.csv"
MoveType = "MBMoveType.csv"

#loading conditions
print "loading '"+str(csvPath)+str(ConditionType)+"' into Memory"
fpReader = open(str(csvPath)+str(ConditionType))
cr = csv.reader(fpReader)
counter = 0
for row in cr:
    if(counter == 0):
        counter+=1
        continue
    Conditions[row[0]] = {"type":row[1],"when":row[2],"durationRange":row[3],"likelihood":row[4],"likelihoodChange":row[5],"uuid":row[8]}
fpReader.close()
#loading Species
print "loading '"+str(csvPath)+str(SpeciesType)+"' into Memory"
fpReader = open(str(csvPath)+str(SpeciesType))
cr = csv.reader(fpReader)
counter = 0
for row in cr:
    if(counter==0):
        counter+=1
        continue
    Species[row[1]] = MegabitSpecies(row)
fpReader.close()
#loadingStatuses
print "loading '"+str(csvPath)+str(StatusType)+"' into Memory"
fpReader = open(str(csvPath)+str(StatusType))
cr = csv.reader(fpReader)
counter = 0
for row in cr:
    if(counter == 0):
        counter+=1
        continue
    Statuses[row[0]] = {"tar":row[1],"tarVal":row[2],"tarValChange":row[3],"needsTarget":row[4], "tarChanges":row[5], "conditionType":row[6], "uuid":row[7]}
fpReader.close()
#load Moves

下一部分失败了：

print "loading '"+str(csvPath)+str(MoveType)+"' into Memory"
    open(str(csvPath)+str(MoveType)) as fpReader:
#fpReader = open(str(csvPath)+str(MoveType))
        cr = csv.reader(fpReader)
        counter = 0
        for row in cr:
            if(counter==0):
            counter+=1
            continue
        Moves[row[0]] = {"typeObject":row[1],"baseLevel":row[2], "baseAttack":row[3],"baseAccuracy":row[4],"targetsOpponent":row[5],"primaryStatObject":row[6],"spriteSheetName":row[7],"statusEffects":row[8],"uuid":row[9]}
        fpReader.close()

它关闭 fpReader，然后打开一个新的，并将其读入 cr。我看不到文件将在哪里关闭。

新守则

with open(str(csvPath)+str(StatusType)) as fpReader:
    #fpReader = open(str(csvPath)+str(StatusType))
    cr = csv.reader(fpReader)
    counter = 0
    for row in cr:
        if(counter == 0):
            counter+=1
            continue
        Statuses[row[0]] = {"tar":row[1],"tarVal":row[2],"tarValChange":row[3],"needsTarget":row[4], "tarChanges":row[5], "conditionType":row[6], "uuid":row[7]}
    fpReader.close()

它在线上失败：

for row in cr:

说： 

Traceback (most recent call last):
  File "battleSystem.py", line 312, in <module>
    main(sys.argv[1:])
  File "battleSystem.py", line 22, in main
    LoadCSVs()
  File "battleSystem.py", line 62, in LoadCSVs
    for row in cr:
ValueError: I/O operation on closed file
4

1 回答 1

2

幸运的是，Python 使文件 I/O 比您做的简单得多。

with open(file, mode) as source:
    #do stuff with source

如果您像这样进行文件访问，则不必担心这种事情。

于 2013-07-20T20:16:18.640 回答