Python言語の高度な機能をいくつか紹介するサンプル・プログラムを紹介しよう：
```python
class BankAccount:
    def __init__(self, name, balance):
        self.name = name
        self._balance = balance
    
    def deposit(self, amount):
        self._balance += amount
    
    def withdraw(self, amount):
        if amount > self._balance:
            raise Exception("Insufficient balance")
        self._balance -= amount
    
    def __str__(self):
        return f"{self.name} has a balance of {self._balance}"

def interest_calculator(accounts, rate):
    return [account._balance * rate for account in accounts]

def main():
    accounts = [
        BankAccount("Alice", 1000),
        BankAccount("Bob", 2000),
        BankAccount("Charlie", 3000)
    ]
    
    [print(account) for account in accounts]
    
    rate = 0.05
    interests = interest_calculator(accounts, rate)
    [print(f"{account.name} earned {interest} in interest") for account, interest in zip(accounts, interests)]

if __name__ == "__main__":
    main()
```
このプログラムではBankAccountクラスを定義し、入出金のためのいくつかのメソッドと、口座情報を表示するための__str__メソッドを定義しています。また、各口座で得られる利息を計算するinterest_calculator関数と、いくつかのBankAccountオブジェクトを作成し、それらの情報と得られる利息を表示するmain関数も定義されている。

このコードはPythonで以下の概念を示しています：

- クラス定義とオブジェクト指向プログラミング
- 例外処理
- リストの理解
- 関数の定義と呼び出し
- 文字列のフォーマット
- if __name__ == "__main__": イディオムの使用法 スクリプト実行時にメイン関数を実行する。
Here's an example program in Python that showcases a few advanced features of the language:
```python
class BankAccount:
    def __init__(self, name, balance):
        self.name = name
        self._balance = balance
    
    def deposit(self, amount):
        self._balance += amount
    
    def withdraw(self, amount):
        if amount > self._balance:
            raise Exception("Insufficient balance")
        self._balance -= amount
    
    def __str__(self):
        return f"{self.name} has a balance of {self._balance}"

def interest_calculator(accounts, rate):
    return [account._balance * rate for account in accounts]

def main():
    accounts = [
        BankAccount("Alice", 1000),
        BankAccount("Bob", 2000),
        BankAccount("Charlie", 3000)
    ]
    
    [print(account) for account in accounts]
    
    rate = 0.05
    interests = interest_calculator(accounts, rate)
    [print(f"{account.name} earned {interest} in interest") for account, interest in zip(accounts, interests)]

if __name__ == "__main__":
    main()
```
This program defines a BankAccount class with a few methods to deposit and withdraw money, as well as a __str__ method for printing the account information. It also defines a interest_calculator function that calculates the interest earned by each account, and a main function that creates a few BankAccount objects and displays their information, along with the interest earned.

This code demonstrates the following concepts in Python:

- Class definition and object-oriented programming
- Exception handling
- List comprehension
- Function definition and calling
- String formatting
- Usage of the if __name__ == "__main__": idiom to run the main function when the script is executed, but not when it is imported as a module.