在python和csv模块中解析和保存csv文件

此脚本用于对csv文件中的列表进行解析和排序，并保存到新创建的csv文件中，包括标题

I triyng包含write函数，用于将此解析器的输出保存到一个新的csv文件，如下所示。此代码创建csv，但仅在一列中记录标题

以下是输入：

Timestamp,Session Index,Event,Description,Version,Platform,Device,User ID,Params,
"Dec 27, 2014 05:26 AM",1,NoRegister,,1.4.0,iPhone,Apple iPhone 5c (GSM),,{},
"Dec 27, 2014 05:24 AM",1,NoRegister,,1.4.0,iPhone,Apple iPhone 5c (GSM),,{},
"Dec 27, 2014 05:23 AM",1,HomeTab,Which tab the user viewed ,1.4.0,iPhone,Apple iPhone 5s (GSM),,{ UserID : 54807;  tabName : Home},
"Dec 27, 2014 05:23 AM",2,HomeTab,Which tab the user viewed ,1.4.0,iPhone,Apple iPhone 5s (GSM),,{ UserID : 54807;  tabName : Home},
"Dec 27, 2014 05:23 AM",3,HomeTab,Which tab the user viewed ,1.4.0,iPhone,Apple iPhone 5s (GSM),,{ UserID : 54807;  tabName : QuickAndEasy},

以下是我希望保存到csv的输出：

Timestamp,Session Index,Event,Description,Version,Platform,Device,User ID,TabName,RecipeID,Type,SearchWord,IsFromLabel,
"Dec 27, 2014 05:26 AM",1,NoRegister,,1.4.0,iPhone,Apple iPhone 5c (GSM),,,,,,,
"Dec 27, 2014 05:24 AM",1,NoRegister,,1.4.0,iPhone,Apple iPhone 5c (GSM),,,,,,,
"Dec 27, 2014 05:23 AM",1,HomeTab,Which tab the user viewed ,1.4.0,iPhone,Apple iPhone 5s (GSM),54807,Home,,,,,
"Dec 27, 2014 05:23 AM",2,HomeTab,Which tab the user viewed ,1.4.0,iPhone,Apple iPhone 5s (GSM),54807,Home,,,,,
"Dec 27, 2014 05:23 AM",3,HomeTab,Which tab the user viewed ,1.4.0,iPhone,Apple iPhone 5s (GSM),54807,QuickAndEasy,,,,,

守则：

import csv


def printfields(keys, linesets):
    output_line = ""
    for key in keys:
        if key in linesets:
            output_line += linesets[key] + ","
        else:
            output_line += ","
    print output_line


def csvwriter(reader, path):
    """
    write reader to a csv file path
    """
    with open(path, "w") as csv_file:
        writer = csv.writer(csv_file, delimiter=",")
        for line1 in line:
            if line1 in path:
                writer.writerow(line1)

if __name__ == "__main__":
    fields = [
        "UserID", "tabName", "RecipeID", "type", "searchWord", "isFromLabel", "targetUID"
    ]
    mappedLines = {}
    with open('test.csv', 'r') as f:
        reader = csv.DictReader(f)
        for line in reader:
            fieldPairs = [
                p for p in
                line['Params'].strip().strip('}').strip('{').strip().split(';')
                if p
            ]
            lineDict = {
                pair.split()[0].strip(): pair.split(':')[1].strip()
                for pair in fieldPairs
            }
            mappedLines[reader.line_num] = lineDict
        path = "output.csv"
        csvwriter(reader, path)

    for key in sorted(mappedLines.keys()):
        linesets = mappedLines[key]
        printfields(fields, linesets)

---

csv\u writer

引用符号

行

——这不是函数的参数。您希望如何提供这些信息？

您的代码中有几个问题

首先把这个放在你的文件的顶部

fields = [
    "Timestamp","Session Index","Event","Description","Version","Platform","Device","User ID","Params",""
]

使用

DictWriter

编写

dict

def csv_writer(lines, path):
    """
    write reader to a csv file path
    """
    with open(path, "w") as csv_file:
        writer = csv.DictWriter(csv_file, fields)
        writer.writeheader()
        # Iterate over dict
        for line1, val in lines.iteritems():
            writer.writerow(val)

使用你的地图

        csv_writer(mappedLines, path)

---

你的缩进是错的。在

def

stmt之后，需要添加缩进。谢谢，我相信这是正确的缩进现在。样本输入？想要的输出示例？此代码运行不正常。修复错误（

“wd”

不是

打开的有效字符串，如果路径中的第1行
，并且缺少
：
），则
之后的缩进仍然错误。添加了要获得的输入和输出。我想我修正了你提到的错误。仍然不运行，但您希望如何提供？对不起，我不太明白你的意思。我已删除函数名称中的下划线谢谢！帮了大忙。但是，我仍然需要将前8列写入新创建的csv。我不知道该怎么做