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How to Check Column Nulls and Replace: Pandas

Here is a post that shows how to count Nulls and replace them with the value you want in the Pandas Dataframe. We have explained the process in two steps - Counting and Replacing the Null values. Count null values (column-wise) in Pandas ## count null values column-wise null_counts = df.isnull(). sum() print(null_counts) ``` Output: ``` Column1    1 Column2    1 Column3    5 dtype: int64 ``` In the above code, we first create a sample Pandas DataFrame `df` with some null values. Then, we use the `isnull()` function to create a DataFrame of the same shape as `df`, where each element is a boolean value indicating whether that element is null or not. Finally, we use the `sum()` function to count the number of null values in each column of the resulting DataFrame. The output shows the count of null values column-wise. to count null values column-wise: ``` df.isnull().sum() ``` ##Code snippet to count null values row-wise: ``` df.isnull().sum(axis=1) ``` In the above code, `df` is the Panda

How to Write Complex Python Script: Explained Each Step

 Creating a complex Python script is challenging, but I can provide you with a simplified example of a script that simulates a basic bank account system. In a real-world application, this would be much more elaborate, but here's a concise version.

Complex Python Script

Python Complex Script

Here is an example of a Python script that explains each step:

class BankAccount:

    def __init__(self, account_holder, initial_balance=0):

        self.account_holder = account_holder

        self.balance = initial_balance

    def deposit(self, amount):

        if amount > 0:

            self.balance += amount

            print(f"Deposited ${amount}. New balance: ${self.balance}")


            print("Invalid deposit amount.")

    def withdraw(self, amount):

        if 0 < amount <= self.balance:

            self.balance -= amount

            print(f"Withdrew ${amount}. New balance: ${self.balance}")


            print("Invalid withdrawal amount or insufficient funds.")

    def get_balance(self):

        print(f"Account balance for {self.account_holder}: ${self.balance}")

# Example usage:

if __name__ == "__main__":

    account1 = BankAccount("Alice", 1000)

    account2 = BankAccount("Bob")







This script defines a BankAccount class with methods for depositing, withdrawing, and checking the balance. In the example usage section, two bank accounts are created for Alice and Bob, and various transactions are made.

Please note that this is a simplified example for demonstration purposes. In a real banking system, you would need more robust security measures, data persistence, and error handling. Additionally, the code would typically be spread across multiple files for better organization and maintainability.



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