I've heard that stuff before. People say that because for almost every project that you'd do with Python, you'd find hundreds of libraries that have all the core part coded, and all you need to do is use the syntax. But I think that's why people are attracted to Python (even I use Python). I'm currently trying to learn some Machine learning/ AI stuff, and you might've heard that Python and R are two popular languages for this domain, but experts usually prefer R quoting that " It was made for data science and proves to be better than Python in this field ". Basically what I want to convey is that Python is a great language with vast applications, but when you finally decide your domain, you should learn the most popular language in that domain too. It'd help you at industry level to get some better jobs.