我是Python和机器学习的新手,我很困惑,这些冒号在某些地方(数组)是什么,它们出现了,有些不出现,有人能给我解释一下吗? 别管我,我是个菜鸟。 companies = pd.read_csv('D:/Programming/Python/TensorFlow/Datasets/Linear Regression/1000_Companies.csv')y = companies.iloc[:, 4].values
#changing the name of cities to machine unde