I know c++ and python both and I want to choose machine learning as my career field but I don't know which language is more helpful for me and in what portion I need what..
Can anyone please tell me what language should I go with and why. Also tell me the implementation of that particular language in this field...

So...should I go with python??

Ok thanx buddy...

why not both? they are both very different languages with different strengths and weaknesses, if you decide for either one you will probably be giving away a good bunch of ability. Just try some things with both for now and see which one you end up using more.
If you are programming a large system you might end up using C++ for internal, low level stuff and later python for high level. What i have heard so far is that C++ can never hurt 😄 and python seems to be good at what C++ is bad at

@theScientist
No 😃 i just wanted to throw in that knowing more than one language is generally good

@theScientist Its just because I only really know C++. I have considered learning Python before so I think I know some of the key differences between C++ and Python and even though i dont know anything about machine learning, I think since C++ is close to memory it can always be useful to be familiar with it.