Question

我是Python的新手，为我的一个项目编写了简单的代码

argv[1]={"configdatabase":"build1","oltpdatabase":"build1","paymentsdatabase":"build1","yccdatabase":"build1"}   
argv[2]=test.txt

代码：

    #!/usr/bin/python
    import json
    import ast
    from sys import argv
    data = argv[1];
    fileName=argv[2];
    data=data.replace("\\","")
    print (data)
    data = json.dumps(data)
    json_to_unicode = json.loads(data)
    unicode_to_dic = ast.literal_eval(json_to_unicode);
    print(type(unicode_to_dic));
    result_dic={};
    data="";
    for k,v in unicode_to_dic.iteritems():
      if v in result_dic.keys():
        data=data.join((result_dic[v],',',k));
        print (data)
        result_dic[v]=data

      else:
        result_dic[v]=k;

    for key,value in result_dic.iteritems():
      with open(fileName,'a') as the_file:
        the_file.write(key+':'+value+'\n')

预期o / p :build1:configdatabase,oltpdatabase,paymentsdatabase,yccdatabase

但是得到如下输出：

build1:oltpdatabase,yccdatabaseoltpdatabase,yccdatabase,oltpdatabase,yccdatabasepaymentsdatabaseoltpdatabase,yccdatabaseoltpdatabase,yccdatabase,oltpdatabase,yccdatabasepaymentsdatabase,oltpdatabase,yccdatabaseoltpdatabase,yccdatabase,oltpdatabase,yccdatabasepaymentsdatabaseconfigdatabase

有人可以帮助我在这里做错了吗？

Answer 1

与javascript不同，你不要在python语句的末尾使用分号。这不是问题，只是一个小小的提示。尝试运行此操作，最后一个打印语句应打印出您需要的内容':build1:configdatabase,oltpdatabase,paymentsdatabase,yccdatabase'

问题是你正在取一个字符串值，添加k，然后将该字符串值附加到原始字符串值。所以它可能看起来像这样。

循环1：

data = ''
result_dic[v] = {'build': 'configdatabase'}

循环2：到目前为止，第3步是毛茸茸的。

data = ''
data after join = 'configdatabase, oltpdatabase'
result_dic[v] = {'build': 'configdatabase, oltpdatabase'}

循环3：

data = 'configdatabase, oltpdatabase'
data after join = 'configdatabase, oltpdatabase, configdatabase, oltpdatabase, paymentsdatabase'
* Because you are joining data => 'configdatabase, oltpdatabase, paymentsdatabase' with result_dic[v] => 'configdatabase, oltpdatabase'
result_dic[v] = {'build': 'configdatabase, oltpdatabase, configdatabase, oltpdatabase, paymentsdatabase'}

我希望这是有道理的。祝你的编码冒险好运！

# !/usr/bin/python
import json
import ast
from sys import argv

data = {
    "configdatabase": "build1",
    "oltpdatabase": "build1",
    "paymentsdatabase": "build1",
    "yccdatabase": "build1",
}

fileName = 'test.txt'
result_dic = {}

data_string = ""


for k, v in data.iteritems():
    if v in result_dic.keys():
        result_dic[v] += ',{0}'.format(k)
    else:
        result_dic[v] = k

print(result_dic)

for key, value in result_dic.iteritems():
    print('{}:{}\n'.format(key, value))
    with open(fileName, 'a') as the_file:
        the_file.write('{0}:{1}\n'.format(key, value))

Python中的代码问题

1 个答案: