def isAlphanum(c):
	return ((c >= 'a' and c <= 'z') or (c >= '0' and c <= '9') or
			(c >= 'A' and c <= 'Z') or c == '_' or c == '$' or c == '\\' or (c is not None and ord(c) > 126));
return true if the character is a letter, digit, underscore,
dataset/ETHPy150Open frappe/frappe/frappe/utils/minify.py/isAlphanum