使用类

Question

我有以下代码，它们会随机生成数字大小的数量。

def createDatabase(size):
    Database=[]
    for j in range(0, size):
        Database.append(randomNumberGenerator(100,Database))  
#randomNumberGenerator is a separate function in my program

def searchDatabase(Database, guess):
    if(guess in Database):
        print('[True,'+str(guess)+']')
    else:
        print('[False,'+str(guess)+']')

我希望searchDatabase搜索以前创建的数据库。如果数据库中有猜测，它将打印[True，guess]。它不是在搜索创建的数据库。如何使其搜索数据库？我假设我想用其他东西代替“数据库”。谢谢。

Answer 1

使用类

一种方法是将这两个函数实现到一个类中，如下所示：

class Database():
    def __init__(self):
        self.database = []

    def createDatabase(self, size):
        for j in range(0, size):
            # I did'nt get why you pass database here, but I leaved as it is in your code
            self.database.append(randomNumberGenerator(100,self.database))

    def searchDatabase(self, guess):
            # here I'm taking advantage of the test redundancy to shorten the code
            print('[{}, {}]'.format(guess in self.database, guess))

如果您对python面向对象编程感兴趣，请参阅this question right here in Stack Overflow的答案以获取对该主题的基本介绍。

有关打印here中使用的python字符串格式的更多信息

用法示例：

db = Database()
db.createDatabase(6)
# Suppose that the database have the following numbers: 4, 8, 15, 16, 23, 42
db.searchDatabase(1)
db.searchDatabase(42)

输出

[False, 1]
[True, 42]

没有课程

def createDatabase(size):
    databse = []
    for j in range(0, size):
        # I did'nt get why you pass database here, but I leaved as it is in your code
        database.append(randomNumberGenerator(100,self.database))
    return database

def searchDatabase(database, guess):
        # here I'm taking advantage of the test redundancy to shorten the code
        print('[{}, {}]'.format(guess in database, guess))

相当于“经典”的用法示例：

db = createDatabase(6)
# Suppose that the database have the following numbers: 4, 8, 15, 16, 23, 42
searchDatabase(db, 1)
searchDatabase(db, 42)

提供与上述相同的输出

搜索在单独的函数中生成的值

1 个答案:

使用类

没有课程