Pandas基本操作详解编程语言

import pandas as pd 
data = {'state': ['Ohio', 'Ohio', 'Ohio', 'Nevada', 'Nevada', 'Nevada'], 
        'year': [2014, 2015, 2016, 2017, 2018, 2019], 
        'pop': [1.5, 1.7, 3.6, 2.4, 2.9, 3.2]} 
df= pd.DataFrame(data)

print(df.shape)

print(df.info())

print(df.dtypes)

print(df.head())

print(df.tail(3))

print(df.index)

print(df.columns)

print(df.values)

print(df.to_numpy())

print(df.describe())

print(df.T())

print(df.sort_index(axis=1, ascending=False))

print(df.sort_values(by='pop'))

print(df['pop'])

print(df[1:3])

print(df.loc[:, ['year', 'state']])