add python_csv.py

Author: xianhu

.gitignore

@@ -10,6 +10,7 @@
 *.pkl
 *.mp3
 *.mp4
+*.csv
 .*
 
 test/

README.md

@@ -47,6 +47,10 @@
 ### MyShow: 玩点好玩的--知乎全部话题关系可视化
 
 ### python_markov_chain.py: 玩点好玩的--使用马尔可夫模型自动生成文章
+
+### python_wechat.py: 玩点好玩的--自己写一个微信小助手
+
+### python_csv.py: Python中CSV文件的简单读写
 ===================================================================================================
 
 ### 您可以fork该项目, 并在修改后提交Pull request

python_csv.py

@@ -0,0 +1,43 @@
+# _*_ coding: utf-8 _*_
+
+"""
+python_csv.py by xianhu
+"""
+
+import csv
+import datetime
+
+# 数据
+data = [
+ [1, "a,bc", 19.353, datetime.datetime(2001, 3, 17)],
+ [2, "ei,f", 13.287, datetime.datetime(2011, 4, 27)],
+ [3, "q\"ij", 15.852, datetime.datetime(2003, 7, 14)],
+ [4, "zh'n", 11.937, datetime.datetime(2012, 1, 9)],
+ [5, "i\'op", 12.057, datetime.datetime(2009, 5, 18)],
+]
+
+# 写文件
+with open("test.csv", "w") as file:
+ writer = csv.writer(file, dialect="excel")
+ # writer.writerows(data)
+ for item in data:
+ writer.writerow(item)
+
+# 读文件
+with open("test.csv", "r") as file:
+ reader = csv.reader(file, dialect="excel")
+ for item in reader:
+ print(item)
+
+# 读文件
+with open("test.csv", "r") as file:
+ reader = csv.DictReader(file, fieldnames=["id", "name", "float", "datetime"], dialect="excel")
+ data = [item for item in reader]
+ print(data)
+
+# 写文件
+with open("test.csv", "w") as file:
+ writer = csv.DictWriter(file, fieldnames=["id", "name", "float", "datetime"], dialect="excel")
+ writer.writeheader()
+ for item in data:
+ writer.writerow(item)