Because it was used by a newsroom in Lawrence, Kansas and they wrote a web framework in python called Django. Their journalistic culture led Django to have real

Because it was used by a newsroom in Lawrence, Kansas and they wrote a web framework in python called Django. Their journalistic culture led Django to have really great documentation, which led to an influx of more casual developers who had an expectation of great documentation to make up for the fact that their main expertise was elsewhere. This made libraries with good docs more successful, making it easier for university courses to choose python as an initial language. This made it easier for university labs to agree on python as a language. This led Travis Oliphant & friends to develop numpy etc.