Python Pandas read_csv保持列顺序

Question

I am reading a CSV file into pandas:

df = pd.read_csv('file.csv')

However, I notice that column order is not preserved. I can't find anything in the docs that explain how to keep the column order when reading in the CSV file.

Answer 1

read.csv convert tabular data into DataFrame object. Since DataFrame are kwargs dictionary, order is not persevered.

Sources from DataFrame and read.csv

Answer 2

you can pass list of the columns with the order you would like them to have:

columns = ['a', 'x', 'b', 'y']
df = pd.read_csv('file.csv', usecols=columns)