main/templatetags/filters.py
def subtract(value, arg):
    """Number subtraction filter for django template language.
    """
    try:
        return value - arg
    except (ValueError, TypeError):
        return None
Number subtraction filter for django template language.
    
Number subtraction filter for django template language.
Number subtraction filter for django template language .
def subtract(value, arg):
    try:
        return value - arg
    except (ValueError, TypeError):
        return None
def subtract ( value , arg ) : try : return value - arg except ( ValueError , TypeError ) : return None
Number subtraction filter for django template language.
Number subtraction filter for django template language .
"""Number subtraction filter for django template language.
    """
value
arg