如何搜索字典值包含某些字符串与Python [英] How to search if dictionary value contains certain string with Python

问题描述

我有一个带键值对的字典。我的值包含字符串。如何搜索字典中是否存在特定的字符串，并返回与包含该值的键对应的键。

我想搜索如果字符串'Mary'存在于字典值中，并获取包含它的键。这是我尝试的，但显然它不会这样工作。

 ＃这个例子如何字典看起来像
 myDict = {'age'：['12']，'address'：['34 Main Street，212 First Avenue']，
'firstName'：['Alan'，'Mary-Ann' ]，'lastName'：['Stone'，'Lee']} 
 
＃检查字符串'Mary'是否存在于字典值
 print'Mary'in myDict.values（）$有没有更好的方法来做这个，因为我可能想要寻找一个存储的值的子字符串（$）$ / pre 
 
 < 'Mary'是值Mary-Ann的子串。
解决方案
你可以这样做： p> 
 
 
 ＃这是一个例子，字典如何看起来像
 myDict = {'age'：['12']，'地址'：['34 Main Street，212 First Avenue']，
'firstName'：['Alan'，'Mary-Ann']，'lastName'：['Stone'，'Lee']} 
 
 def se arch（values，searchFor）：
 for k in values：
 for v in values [k]：
 if searchFor in v：
 return k 
 return None 
 
＃检查字符串'Mary'是否存在于字典值中
 print search（myDict，'Mary'）#prints firstName 
  
 
I have a dictionary with key-value pair. My value contains strings. How can I search if a specific string exists in the dictionary and return the key that correspond to the key that contains the value.

Let's say I want to search if the string 'Mary' exists in the dictionary value and get the key that contains it. This is what I tried but obviously it doesn't work that way.
#Just an example how the dictionary may look like
myDict = {'age': ['12'], 'address': ['34 Main Street, 212 First Avenue'],
          'firstName': ['Alan', 'Mary-Ann'], 'lastName': ['Stone', 'Lee']}

#Checking if string 'Mary' exists in dictionary value
print 'Mary' in myDict.values()
Is there a better way to do this since I may want to look for a substring of the value stored ('Mary' is a substring of the value 'Mary-Ann').
解决方案
You can do it like this:
#Just an example how the dictionary may look like
myDict = {'age': ['12'], 'address': ['34 Main Street, 212 First Avenue'],
      'firstName': ['Alan', 'Mary-Ann'], 'lastName': ['Stone', 'Lee']}

def search(values, searchFor):
    for k in values:
        for v in values[k]:
            if searchFor in v:
                return k
    return None

#Checking if string 'Mary' exists in dictionary value
print search(myDict, 'Mary') #prints firstName


                        
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