python - Unqlite python how to search collection for value that matches requirement

Question

We are to search collection and find businesses in the county from countyToSearch. Save the name, full address, county and state to saveLocation1

How it is currently is not correct. I dont really understand the filter()

def FindBusinessBasedOnCounty(countyToSearch, saveLocation1, collection):

    c = collection.filter(lambda user: user['county'] == countyToSearch)
  
    f = open(saveLocation1, 'w')
    for bus in c:
       f.write(bus["Name"] + "$" + bus["FullAddress"] + "$" + bus["County"] + "$" + bus["State"] + "\n")
       f.close()

edit: I want the result to be the rows in database, where the countyname is equal to countyToSearch.

Answer 1

我没有看到您的收藏示例，但我看到的是：

1. 过滤器应用作：

   c = filter(lambda user: user['county'] == countyToSearch, collection)
   

2. 你有大写County和小写county。

3. 此外，您必须使用with open(..)而不是open() ... close()