Python Write CSV method summary

One of the most common ways to use pandas packages

import pandas as pd #任意的多组列表a = [1, 2,3]b = [4, 5,6]  #字典中的key值即为csv中列名dataframe = Pd. DataFrame ({ ' a_name ': A, ' B_name ': b})  #将DataFrame存储为csv, index indicates whether the row name is displayed, Default=truedataframe.to_csv (  "Test.csv", Index=false,sep= ', ')  

   a_name  b_name0       1       41 2 52 3 6

The same pandas also provides a simple read CSV method

import pandas as pddata = pd.read_csv(‘test.csv‘)

Another method is to use a CSV package, one line to write

import csv#python2可以用file替代openwith open("test.csv","w") as csvfile:     writer = csv.writer(csvfile)    #先写入columns_name    writer.writerow(["index","a_name","b_name"]) #写入多行用writerows writer.writerows([[0,1,3],[1,2,3],[2,3,4]])

index   a_name  b_name0       1       31 2 32 3 4

Read the CSV file with reader

import csvwith open("test.csv","r") as csvfile: reader = csv.reader(csvfile) #这里不需要readlines for line in reader: print line

Python Write CSV method summary