You can first append elements to the initialized array and then for convenience, you can convert it into a numpy array. import numpy as np a ... ... <看更多>

In this Python Video tutorial, we will discuss how to append two arrays in Python NumPy,Additionally, I have covered:How to use the NumPy ... ... <看更多>

Every Numpy array comes equipped with a shape attribute that we can use to determine the shape of the array. This can be accessed by appending .shape to the end ... ... <看更多>

Maybe this can help (if you don't want to use numpy ): headers = ['foo', 'bar', 'baz', 'other'] l = len(headers) arr = [["xxx" for i in ... ... <看更多>