在之前的文章中，我介绍了为什么CSV文件格式用于python学习？本文将详细介绍python中不同的CSV功能和用途。
一、CSV模块功能
以下功能可以在CSV模块下找到。
二、PythonCSV文件操作
加载CSV文件后，您可以执行多种操作。CSV文件的读写将显示在Python中
读取Python中的CSV文件：
importcsv
withopen('Titanic.csv','r')ascsv_file:#Opensthefileinreadmode
csv_reader=csv.reader(csv_file)#Makinguseofreadermethodforreadingthefile
forlineincsv_reader:#Iteratethroughthelooptoreadlinebyline
print(line)将CSV文件写入Python：
importcsv
withopen('Titanic.csv','r')ascsv_file:
csv_reader=csv.reader(csv_file)
withopen('new_Titanic.csv','w')asnew_file:#Openanewfilenamed'new_titanic.csv'underwritemode
csv_writer=csv.writer(new_file,delimiter=';')#makinguseofwritemethod
forlineincsv_reader:#foreachfileincsv_reader
csv_writer.writerow(line)#writingouttoanewfilefromeachlineoftheoriginalfile作为字典，读取CSV文件
importcsv
withopen('Titanic.csv','r')ascsv_file:#Openthefileinreadmode
csv_reader=csv.DictReader(csv_file)#usedictreadermethodtoreadethefileindictionary
forlineincsv_reader:#Iteratethroughthelooptoreadlinebyline
print(line)CSV文件作为字典写入
importcsv
mydict=[{'Passenger':'1','Id':'0','Survived':'3'},#key-valuepairsasdictionaryobj
{'Passenger':'2','Id':'1','Survived':'1'},
{'Passenger':'3','Id':'1','Survived':'3'}]
fields=['Passenger','Id','Survived']#fieldnames
filename='new_Titanic.csv'#nameofcsvfile
withopen('new_Titanic.csv','w')asnew_csv_file:#openanewfile'new_titanic,csv'underwritemode
writer=csv.DictWriter(new_csv_file,fieldnames=fields)
writer.writeheader()#writingtheheaders(fieldnames)
writer.writerows(mydict)#writingdatarows