Get expression and codeblock from .cal file as strings.

cal_to_expression_codeblock

def expression_code_block_from_cal(infile):
    with open(infile, "rb") as data:
        text = data.read().decode('utf-16-le')

    

    lines = text.splitlines()
    

    # trim the trailing spaces
    trimmed_lines = []
    for line in lines:
        trimmed_lines.append(line.rstrip())

    filter(None, trimmed_lines)

    
    
    n = trimmed_lines.index("__esri_field_calculator_splitter__")
    

    function = trimmed_lines[n+1]

    expression = r"\n".join(trimmed_lines[:n-1])
    print_msg("Function: " + function)
    print_msg("Expression: " + expression)

    return [function, expression]