pandas 类型错误：“方法”类型的对象没有 len()
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TypeError: object of type 'method' has no len()
提问by Ryan Chen
def DS():
import os
import pandas as pd
directory=input('What folder would you like to work in? ( Example: /Users/hem/Desktop/pythontest/ ')
filename=input('Please enter the name (including .csv) of the file you would like to analyze ' )
idkey=input('What is the subject ID you are analyzing? ' )
sessionkey=input('What session of testing are you analyzing? ')
print('---------- Calculating Drug Stroop endpoints ----------')
os.chdir(directory)
dataframe = pd.read_csv(filename, error_bad_lines=False)
output={}
CategoryID = dataframe['CategoryID'].tolist
ReactionTime = dataframe['ReactionTime'].tolist
CorrectResponse = dataframe['CorrectResponse'].tolist
#Stroop interference score
totalN = 0
countN = 0
CorrectResponseNeutral = 0
for i in range(len(CategoryID)):
if CategoryID[i] == 1:
totalN + ReactionTime[i]
countN + 1
CorrectResponseNeutral + CorrectResponse[i]
AverageRTNeutral = totalN/countN
CorrectResponseNeutral = CorrectResponseNeutral/countN
totalD = 0
countD = 0
CorrectResponseDrug = 0
for i in range(len(CategoryID)):
if CategoryID[i] == 2:
totalD + ReactionTime[i]
countD + 1
CorrectResponseDrug + CorrectResponse[i]
AverageRTDrug = totalD/countD
CorrectResponseDrug = CorrectResponseDrug/countD
InterferenceScore = AverageRTNeutral - AverageRTDrug
output['SubjectID'] = idkey
output['Session'] = sessionkey
output['Interference Score'] = InterferenceScore
output['Accuracy of Neutral Trials'] = CorrectResponseNeutral
output['Accuracy of Drug Trials'] = CorrectResponseDrug
print('---------- Done calculating endpoints ----------')
outputname=input('What would you like to name your outputfile? (Please include.csv)')
outputdataframe = pd.DataFrame.from_dict([output])
outputdataframe.to_csv(os.path.join('/Users/hem/Desktop/Analysis/DrugStroopAnalyzed',outputname))
Hey Guys. Im trying to write a script that would calculate endpoints for a medical task. When I run the program, it works all the way until it hits the first for loop of the script. I'm pretty sure there is an error because CategoryID doesnt have a length property. But I also think it should because I'm converting it to a list in the beginning. Any suggestions on how to fix this? Thanks in advance.
大家好。我正在尝试编写一个脚本来计算医疗任务的端点。当我运行程序时，它会一直运行，直到遇到脚本的第一个 for 循环。我很确定存在错误，因为 CategoryID 没有长度属性。但我也认为应该这样做，因为我一开始就将其转换为列表。对于如何解决这个问题，有任何的建议吗？提前致谢。
回答by Christian
It seems like you forgot the ()after tolistmethod, so it can be parsed as a call to the method, and not the method itself:
似乎您忘记了()aftertolist方法，因此可以将其解析为对方法的调用，而不是方法本身：
CategoryID = dataframe['CategoryID'].tolist()
ReactionTime = dataframe['ReactionTime'].tolist()
CorrectResponse = dataframe['CorrectResponse'].tolist()
