python reads file read_excel function

 Commonly used: read_csv, read_excel in pandas

Table of contents

Common parameters:

1. Filepath path introduction

2. Headers and names about column names

3. Display the data read from the file

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Common parameters:

 

1. Filepath path introduction

The computer directly copies the path in the form: path=G:\download file\data\users.dat

But python only recognizes: "/" and cannot directly recognize "\"

Then there are the following two methods

(1) path=r"G:\Download File\data\users.dat"

(2) path=path.replace("\\","/") (replace "\" with "/")

Reference:Python How to replace "/" in a string with "\"_Xiaoyangzi JL's blog-CSDN blog_python text/replacement

2. Headers and names about column names

· header: the default is inter (identified by the system itself);

If header=0, the first line is the column name; if header=3, the fourth line is the column name; header=None means the column name is customized.

· Custom column names use parameter names to accept array

3. Display the data read from the file

import pandas as pd
import numpy as np
df=pd.read_excel(r'F:\个人嘿嘿嘿\北师大BNU\研一上-课业资料\时间序列\作业2\timeseries17.xlsx',header=0)

#如何将表中所有数据显示全？
#显示所有列
pd.set_option('display.max_columns',None)
#显示所有行
pd.set_option('display.max_rows',None)
#设置value的显示长度为100，默认为50
pd.set_option('max_colwidth',100)
#输完以上代码，再读取df即可得到所需数据

#测试显示前五行or后五行
df.head() #可设置具体参数显示前n行
df.tail()