Python:CSV讀寫(以字典的方式處理)
阿新 • • 發佈:2018-12-22
#!/usr/bin/env python # coding:UTF-8 """ @version: python3.x @author:曹新健 @contact: [email protected] @software: PyCharm @file: CSV讀寫2.py @time: 2018/11/13 14:27 """ import csv #csv的DictReader()和DictWriter()方法將以字典的方式處理csv檔案,實質上是以OrderedDict方式進行處理 #預設將CSV檔案的第一列作為欄位名 def csvDictReader1(path): with open(path) as rf: reader = csv.DictReader(rf) items = list(reader) return items #指定欄位名,第一列也為資料 def csvDictReader2(path,fieldnames): with open(path) as wf: reader = csv.DictReader(wf,fieldnames=fieldnames) items = list(reader) return items def csvDictWriter(path,data,fieldnames): with open(path,"w",newline="") as wf: writer = csv.DictWriter(wf,fieldnames=fieldnames) writer.writeheader() writer.writerows(data) if __name__ == "__main__": fieldnames = ["aaa", "bbb", "ccc", "ddd"] csvItems1 = csvDictReader1("111.csv") csvItems2 = csvDictReader2("222.csv", fieldnames) csvDictWriter("333.csv",csvItems1,fieldnames) csvDictWriter("444.csv",csvItems2,fieldnames)