Question

我的文件包含“名称”和5个眼动值（TFF，TFD，TVD，FB，FC）。如果“名称”列下的行相同，我想总结每个眼睛的运动值。似乎代码正在运行，没有发生任何错误，但是我的输出文件仍然为空。谁能给我一些指示哪里出了问题？这是代码：

import csv

file  = open("P01_All.csv", "r") #Open CSV File in Read Mode
reader = csv.reader(file) #Create reader object which iterates over lines
outfile = open("Name.csv","w")
outfile2 = open("TFF.csv","w")
outfile3 = open("TFD.csv","w")
outfile4 = open("TVD.csv","w")
outfile5 = open("FB.csv","w")
outfile6 = open("FC.csv","w")


class Object:                   #Object to store unique data
    def __init__(self, Name, TFF, TFD, TVD, FB, FC):
        self.Name = Name
        self.TFF = TFF
        self.TFD = TFD
        self.TVD = TVD
        self.FB = FB
        self.FC = FC



rownum = 0 #Row Number currently iterating over
list = []  #List to store objects

def checkList(Name, TFF, TFD, TVD, FB, FC):

    for object in list:  #Iterate through list        
        if object.Name == Name:  
            object.TFF += float(TFF)
            object.TFD += float(TFD)
            object.TVD += float(TVD)
            object.FB += float(FB)
            object.FC += float(FC)
            return

    newObject = Object(Name, float(TFF),float(TFD), float(TVD), float(FB), float(FC)) #Create a new object with new eye and TFF
    list.append(newObject)  #Add to list and break out

for row in reader:  #Iterate through all the rows
    if rownum == 0:  #Store header row seperately to not get confused
        header = row
    else:
        Name = row[0]
        TFF = row[1]
        TFD = row[2]
        TVD = row[3]
        FB = row[4]
        FC = row[5]

        if len(list) == 0:  #Default case if list = 0
            newObject = Object(Name, float(TFF),float(TFD), float(TVD), float(FB), float(FC))
            list.append(newObject)
        else:  #If not...
            checkList(Name, TFF, TFD, TVD, FB, FC)


rownum += 1

for each in list: #Print out result
#   print(each.Name, each.TFF, each.TFD, each.TVD, each.FB, each.FC)
    outfile.write(each.Name + "\n" )
    outfile2.write(str(each.TFF)+ "\n" )
    outfile3.write(str(each.TFD)+ "\n" )
    outfile4.write(str(each.TVD)+ "\n" )
    outfile5.write(str(each.FB)+ "\n" )
    outfile6.write(str(each.FC)+ "\n" )

file.close() #Close file
outfile.close()
outfile2.close()
outfile3.close()
outfile4.close()
outfile5.close()
outfile6.close()

Answer 1

就像@zwer一样，输出文件中没有内容的原因是因为在迭代输入文件中的行时没有递增rownum。通过缩进rownum += 1行，可以将其放入循环中，在循环中您可以读取每一行。因此，只需进行最少的修改，看起来就可以

import csv

file  = open("P01_All.csv", "r") #Open CSV File in Read Mode
reader = csv.reader(file) #Create reader object which iterates over lines
outfile = open("Name.csv","w")
outfile2 = open("TFF.csv","w")
outfile3 = open("TFD.csv","w")
outfile4 = open("TVD.csv","w")
outfile5 = open("FB.csv","w")
outfile6 = open("FC.csv","w")


class Movement_value:                   #Object to store unique data
    def __init__(self, Name, TFF, TFD, TVD, FB, FC):
        self.Name = Name
        self.TFF = TFF
        self.TFD = TFD
        self.TVD = TVD
        self.FB = FB
        self.FC = FC



rownum = 0 #Row Number currently iterating over
notebook = []  #List to store objects

def checkList(Name, TFF, TFD, TVD, FB, FC):

    for value in notebook:  #Iterate through list        
        if value.Name == Name:  
            value.TFF += float(TFF)
            value.TFD += float(TFD)
            value.TVD += float(TVD)
            value.FB += float(FB)
            value.FC += float(FC)
            return

    newObject = Movement_value(Name, float(TFF),float(TFD), float(TVD), float(FB), float(FC)) #Create a new object with new eye and TFF
    notebook.append(newObject)  #Add to list and break out

for row in reader:  #Iterate through all the rows
    if rownum == 0:  #Store header row seperately to not get confused
        header = row
    else:
        Name = row[0]
        TFF = row[1]
        TFD = row[2]
        TVD = row[3]
        FB = row[4]
        FC = row[5]

        if len(notebook) == 0:  #Default case if list = 0
            newObject = Movement_value(Name, float(TFF),float(TFD), float(TVD), float(FB), float(FC))
            notebook.append(newObject)
        else:  #If not...
            checkList(Name, TFF, TFD, TVD, FB, FC)


    rownum += 1

for each in notebook: #Print out result
#   print(each.Name, each.TFF, each.TFD, each.TVD, each.FB, each.FC)
    outfile.write(each.Name + "\n" )
    outfile2.write(str(each.TFF)+ "\n" )
    outfile3.write(str(each.TFD)+ "\n" )
    outfile4.write(str(each.TVD)+ "\n" )
    outfile5.write(str(each.FB)+ "\n" )
    outfile6.write(str(each.FC)+ "\n" )

file.close() #Close file
outfile.close()
outfile2.close()
outfile3.close()
outfile4.close()
outfile5.close()
outfile6.close()

我进行了一些其他更改：最好不要使用list或object作为变量名，因为它们已在Python中使用，这样做可以覆盖它们的含义。最终您可能会感到很意外。

但是我们可以做更多。

我们不需要创建一个类来保存值
我们可以使用上下文管理器来处理文件，以确保我们的文件不会由于不相关的原因而保持打开状态。

这是比您短的版本：

import csv
import pathlib

input_filepath = pathlib.Path("Input.csv")
output_filepath = pathlib.Path("")

with open(input_filepath, newline="") as input_file:
    # Where our data will be kept
    input_data = {}

    csv_reader = csv.reader(input_file)
    # Skip the first line
    next(csv_reader)

    for (Name, *rest_of_data) in csv_reader:
        if Name in input_data:
            for (index_of_data_to_update, data_to_update) in enumerate(rest_of_data):
                input_data[Name][index_of_data_to_update] += float(data_to_update)
        else:
            input_data[Name] = [float(x) for x in rest_of_data]

output_rows = ([name] + list(data) for (name, data) in input_data.items())

output_filenames = [
    "Name.csv",
    "TFF.csv",
    "TFD.csv",
    "TVD.csv",
    "FB.csv",
    "FC.csv"
    ]

output_files = [open(output_filepath / filename, "w") for filename in output_filenames]

# Open all the files
with output_files[0], output_files[1], output_files[2], output_files[3], \
     output_files[4], output_files[5]:
    for row in output_rows:
        for (output_file, data) in zip(output_files, row):
            output_file.write("{}\n".format(data))

我的输出文件中没有任何值

1 个答案: