'io.BufferedReader'對象不可下標'錯誤

Question

我正在為PsychoPy的實驗編寫Stroop任務。 我正在嘗試繪制圖像和文本刺激，但是卻收到錯誤消息（如下所示）。

我嘗試查看google / stackoverflow頁面，但不理解此錯誤消息（因此很難修復此代碼）。

# ------Prepare to start Routine "instructions"-------
t = 0
instructionsClock.reset()  # clock
frameN = -1
continueRoutine = True
# update component parameters for each repeat
ready = event.BuilderKeyResponse()
# keep track of which components have finished
instructionsComponents = [instrText, ready]
for thisComponent in instructionsComponents:
    if hasattr(thisComponent, 'status'):
        thisComponent.status = NOT_STARTED

#read stimuli file
trials = open('cog2.csv', 'rb')
imageFile = 0     #imageFile = trials[trialNumber][Column]
corrAns = 1       #corrAns = trials[trialNumber][Column]
Congruent = 2     #Congruent = trials[trialNumber][Column]
stimCat = 3       #stimCat = trials[trialNumber][Column]
Superimposed = 4  #Superimposed = trials[trialNumber][Column]
Word = 5          #word = trials[trialNumber][Column]

#turn the text string into stimuli
textStimuli = []
imageStimuli = []
for trial in trials:
    textStimuli.append(visual.TextStim(win, text=trials[Word]))  <---- ERROR
    imageStimuli.append(visual.ImageStim(win, size=[0.5, 0.5], image=trials[imageFile]))

我正在嘗試從我上傳的Excel文檔中寫出繪畫刺激（包含jpg圖像的路徑以及要疊加在圖像上的單詞）。

不過目前，我收到錯誤消息：

#### Running: C:\Users\Sophie\OneDrive\Spring '19\Research\PsychoPy\Bejj\Test_3_22_19.py #####
Traceback (most recent call last):
  File "C:\Users\Sophie\OneDrive\Spring '19\Research\PsychoPy\Bejj\Test_3_22_19.py", line 203, in <module>
    textStimuli.append(visual.TextStim(win, text=trials[Word]))
TypeError: '_io.BufferedReader' object is not subscriptable

Answer 1

trials變量是一個文件對象（來自trials = open('cog2.csv', 'rb') ），並且您嘗試使用trials = open('cog2.csv', 'rb') trials[Word]作為列表訪問它，因此出現錯誤。

您應該使用csv.reader方法代替以CSV格式讀取文件，以便將trial分配給每一行作為列表，並且可以按預期使用索引訪問每一列：

import csv
for trial in csv.reader(trials):
    textStimuli.append(visual.TextStim(win, text=trial[Word]))
    imageStimuli.append(visual.ImageStim(win, size=[0.5, 0.5], image=trial[imageFile]))