python script convert string to hex as echo -e command, tested with python 2.7 and 3.5

Example to run script

~$ python2.7 str_to_hex_for_echo_cmd.py
echo -e "testecho_\x21#\x24%\x2a\x5c'\x5c\x22\x21~?<>\x3a| 89920."

~$ python3.5 str_to_hex_for_echo_cmd.py
echo -e "testecho_\x21#\x24%\x2a\x5c'\x5c\x22\x21~?<>\x3a| 89920."

~$ echo -e "testecho_\x21#\x24%\x2a\x5c'\x5c\x22\x21~?<>\x3a| 89920."
testecho_!#$%*\'\"!~?<>:| 89920.

str_to_hex_for_echo_cmd.py

sample="""testecho_!#$%*\\'\\"!~?<>:| 89920."""
echo_validates = "#% _~'?><|,."
data = []
for c in sample:
    if c.isalpha() or c.isdigit() or c in echo_validates:
        data.append(c)
    else:
        data.append("\\x%0x" % ord(c))

print('echo -e "%s"\n' % "".join(data))