🔍 Code Extractor

Looks up and returns the full department name corresponding to a given department code by searching through a DEPARTMENTS dictionary.

Purpose

This function provides a reverse lookup mechanism to convert department codes into their full human-readable names. It iterates through a DEPARTMENTS dictionary (which maps department names to codes) and returns the matching name. If no match is found, it returns the original code as a fallback. This is useful for displaying user-friendly department names in reports, UI elements, or logs when only the code is available.

Source Code

def get_department_name(code):
    """Get full department name from code."""
    for name, dept_code in DEPARTMENTS.items():
        if dept_code == code:
            return name
    return code

Parameters

Parameter Details

code: The department code to look up. Expected to be a value that matches one of the values in the DEPARTMENTS dictionary. Type is not explicitly constrained but typically would be a string or integer depending on how department codes are structured in the system.

Return Value

Returns a string representing the full department name if a matching code is found in the DEPARTMENTS dictionary. If no match is found, returns the original 'code' parameter unchanged as a fallback. The return type matches the type of keys in the DEPARTMENTS dictionary (typically string) or the type of the input code parameter.

Usage Example

# Assuming DEPARTMENTS is defined as:
# DEPARTMENTS = {'Engineering': 'ENG', 'Sales': 'SAL', 'Marketing': 'MKT'}

# Get department name from code
dept_name = get_department_name('ENG')
print(dept_name)  # Output: 'Engineering'

# Handle unknown code
unknown_dept = get_department_name('XYZ')
print(unknown_dept)  # Output: 'XYZ' (returns the code itself)

# Typical use case in a report
code = 'SAL'
print(f'Department: {get_department_name(code)}')  # Output: 'Department: Sales'

Best Practices

• Ensure the DEPARTMENTS dictionary is properly defined and accessible in the module scope before calling this function
• Consider using a more efficient lookup method (like inverting the dictionary once) if this function is called frequently in performance-critical code
• The function returns the original code if not found, which provides graceful degradation but may mask data quality issues - consider logging unknown codes
• For case-insensitive lookups, normalize the code parameter before comparison
• Consider caching the inverted dictionary (code->name mapping) as a module-level constant for O(1) lookup time instead of O(n) iteration

Tags

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