Syntax errors

[jon65]

Hi I am new to python, my reason for trying it is to backup the flash memory on my esp8266. I have installed python 3.6.2 and eventually esptools.py. being a newbie I rely on google to find the info I need. The first attempt to install esptool i used the code

$ pip install esptool

which didnt work came back with syntax error. Some more searching suggested

import pip
package_name-'esptool'
pip.main(['install', package_name])

which worked But if I then try

esptool -h

I get NameError esptool not defined. Further searching suggested I needed PySerial.py so I installed that too, but I am still getting syntax and not defined errors
this is the code to copy the memory

python.exe esptool.py --port COM5 --baud 115200 read_flash 0x000 524288 backup.bin

which returns SyntaxError: invalid syntax

Any help would be great, I imagine its something simple that I am not doing right

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