human
What is a good Python program to calculate the standard deviation or missing percentage of a variable in a dataframe.
assistant
Here is a Python program to calculate the standard deviation or missing percentage of a variable in a dataframe

import pandas as pd

def calculate_missing_percentage(df):
    """
    Calculate the missing percentage of a variable in a dataframe.
    """
    return 100 - (100 * df.isnull().sum() / df.shape[0])

# Enter the data
df = pd.DataFrame({"a": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10],
                   "b": [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]})

# Calling the function
print((calculate_missing_percentage(df)))

#Example Output
# a    100.0
# b    100.0
# dtype: float64

#Remember to inspect code for bugs.