htmlspecialchars.py

def escape_html(self, var):
    meta_chars = {
        '"': '"',
        '\'': ''',
        '&': '&',
        '<': '&lt;',
        '>': '&gt;',
    }
    escaped_var = ""
    for i in var:
        if i in meta_chars:
            escaped_var = escaped_var + meta_chars[i]
        else:
            escaped_var = escaped_var + i
    return escaped_var