pandas常用函數(shù)：
一般的，我們使用如下縮寫：
df：任意的Pandas DataFrame對(duì)象
s：任意的Pandas Series對(duì)象
模塊的導(dǎo)入：
import pandas as pd
import numpy as pd
https://www.cnblogs.com/ly803744/p/10468307.html
Series
https://blog.csdn.net/kingov/article/details/79513322
Pipeline
https://scikit-learn.org/stable/modules/generated/sklearn.pipeline.make_pipeline.html
- apply()函數(shù)
http://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.apply.html
https://blog.csdn.net/qq_19528953/article/details/79348929
- fillna()函數(shù)
https://blog.csdn.net/qq_21840201/article/details/81008566
3.one hot 獨(dú)熱編碼
https://blog.csdn.net/yueyao121107/article/details/79730934
4.pandas的get_dummies
http://www.itdecent.cn/p/c324f4101785
get_dummies是將擁有不同值的變量轉(zhuǎn)換為0/1數(shù)值
5.pandas.DataFrame.notnull
http://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.notnull.html
返回非空值
notnull（）返回值是布爾型（0-1矩陣）的矩陣。再取df[布爾型矩陣]返回的是id為非空的行
isnull()同理返回空值
https://blog.csdn.net/waiwai3/article/details/80736714
6.pandas.DataFrame.as_matrix
DataFrame.as_matrix([columns]) 轉(zhuǎn)換為矩陣
https://blog.csdn.net/hhtnan/article/details/80080240
7.pandas.DataFrame.loc()
http://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.DataFrame.loc.html
iloc，即index locate 用index索引進(jìn)行定位，所以參數(shù)是整型，如：df.iloc[10:20, 3:5]
loc，則可以使用column名和index名進(jìn)行定位，如：
df.loc[‘image1’:‘image10’, ‘a(chǎn)ge’:‘score’]
https://blog.csdn.net/missyougoon/article/details/83375375
8.groupby()
https://www.zhangshengrong.com/p/q0Xpqj4j1K/
