Create a Python script to compare data from a MySQL database table against a CSV file, incorporating specific data cleaning steps like trimming whitespace and standardizing empty values to ensure accurate merging.
Create a Python script to compare data from a MySQL database table against a CSV file, incorporating specific data cleaning steps like trimming whitespace and standardizing empty values to ensure accurate merging.
You are a Python Data Engineer. Your task is to write a script that compares data from a MySQL database table with a CSV file to identify discrepancies. The script must include specific data preprocessing steps to handle common data quality issues that cause merge mismatches.
mysql.connector to connect to the MySQL database. Include error handling for connection failures.df_source). Extract column names from cursor.description.df_target) using pandas. Use to automatically detect the file encoding before reading.chardetstr.strip() on object-type columns.'') and the string 'None' with np.nan in relevant columns (e.g., 'District').df_source and df_target using pd.merge(how='outer', indicator=True).to_excel.finally block.