Question

我认为我想做的事情很简单。我正在将.json转换为.csv文件，但很难获得我想要的东西。我确定我很傻，但是在此网站上找不到答案。请指出我的愚蠢错误是什么！

我正在使用以下Python代码：

import csv, json

inputFile = open('results_20190214b.txt') outputFile = open('results_20190214.csv', 'w', newline='')

data = json.load(inputFile) inputFile.close

output = csv.writer(outputFile)

for row in data:
    output.writerow([row])

outputFile.close()

我的json看起来像这样：

 {
                "AccumulatedNewCapacity[UTOPIA,E01,1999]": {
                    "Value": 0.0225798659394097
                },
                "AccumulatedNewCapacity[UTOPIA,E01,2000]": {
                    "Value": 0.149302162579271
                },
                "AccumulatedNewCapacity[UTOPIA,E01,2001]": {
                    "Value": 0.354595177554284
                },
                "AccumulatedNewCapacity[UTOPIA,E01,2002]": {
                    "Value": 0.553976916527268
                },
                "AccumulatedNewCapacity[UTOPIA,E01,2003]": {
                    "Value": 0.749394931502283
                }, ETC

此代码已成功将字段名称打印到CSV，但我没有任何值。例如：

AccumulatedNewCapacity[UTOPIA,E01,1999]
AccumulatedNewCapacity[UTOPIA,E01,2000]
AccumulatedNewCapacity[UTOPIA,E01,2001]

任何想法都非常感谢。谢谢！

Answer 1

您需要迭代行，如此处所述。 https://stackoverflow.com/a/26660785/11110555

因此，您可以执行以下操作

for row in data.items():
    output.writerow(row)

但是，请记住，您将最终生成元组，就像在CSV上跟随该元组一样；

"AccumulatedNewCapacity[UTOPIA,E01,1999]",{'Value': 0.0225798659394097}
"AccumulatedNewCapacity[UTOPIA,E01,2000]",{'Value': 0.149302162579271}
"AccumulatedNewCapacity[UTOPIA,E01,2001]",{'Value': 0.354595177554284}
"AccumulatedNewCapacity[UTOPIA,E01,2002]",{'Value': 0.553976916527268}
"AccumulatedNewCapacity[UTOPIA,E01,2003]",{'Value': 0.749394931502283}

我想您想为CSV的AccumulatedNewCapacity和Value添加边框

for row in data.items():
    # Getting the first part of AccumulatedNewCapacity
    basePart = row[0]
    #Extracting text inside borders
    baseStr = basePart[basePart.find("[")+1:basePart.find("]")]

    # Getting the Value part
    valuePart = row[1]
    #Extracting value
    valueStr = valuePart['Value']

    output.writerow([baseStr,valueStr])

这将导致您在CSV上获得以下结果，因为它是作为字符串而不是作为列表编写的。

"UTOPIA,E01,1999",0.0225798659394097
"UTOPIA,E01,2000",0.149302162579271
"UTOPIA,E01,2001",0.354595177554284
"UTOPIA,E01,2002",0.553976916527268
"UTOPIA,E01,2003",0.749394931502283

因此，您需要将值转换为list并将值附加到其中。

import csv, json

inputFile = open('results.txt')
outputFile = open('results_20190214.csv', 'w', newline='\n')

data = json.load(inputFile)
inputFile.close

output = csv.writer(outputFile)

for row in data.items():
    # Getting the first part of AccumulatedNewCapacity
    basePart = row[0]
    # Extracting text inside borders
    baseStr = basePart[basePart.find("[")+1:basePart.find("]")]

    # Splitting values with comma and turning into list
    writeStr = baseStr.split(",")
    # Getting the Value part
    valuePart = row[1]
    #Extracting value
    valueStr = valuePart['Value']

    # Adding value to the list
    writeStr.append(valueStr)

    # Writing into CSV
    output.writerow(writeStr)

outputFile.close()

编辑：忘记添加结果。结果将如下所示

UTOPIA,E01,1999,0.0225798659394097
UTOPIA,E01,2000,0.149302162579271
UTOPIA,E01,2001,0.354595177554284
UTOPIA,E01,2002,0.553976916527268
UTOPIA,E01,2003,0.749394931502283

Answer 2

尝试一下：

import csv 
with open('results_20190214b.txt', 'r') as in_file:
    stripped = (line.strip() for line in in_file)
    lines = (line.split(",") for line in stripped if line)
    with open('results_20190214.csv', 'w') as out_file:
        writer = csv.writer(out_file)
        writer.writerow(( 'title', 'intro')) # here enter your rows titles
        writer.writerows(lines)

Answer 3

感谢您的回复-非常有用。

我实际上也想将变量名也保留在csv中，因此最终使用了Koray B建议代码的细微变化：

for row in data.items():
    variablePart = row[0]
    variableStr = variablePart[:variablePart.find("[")]
    writeStr = []
    writeStr.append(variableStr)
    variableIndexStr = variablePart[variablePart.find("[")+1:variablePart.find("]")]
    variableIndexStrSplit = variableIndexStr.split(",")
    for i in variableIndexStrSplit:
        indexStr = i
        writeStr.append(indexStr)

    valuePart = row[1]
    valueStr = valuePart['Value']
    writeStr.append(valueStr)

    output.writerow(writeStr)

使用Python将json转换为csv

3 个答案: