python之關於csv的檔案讀寫記錄

anaconda 4.2.0 (64-bit)

python 3.5.2

關於csv檔案讀寫練習小系統。

程式如下：

import csv

import time
import sys
filename = 'ha.csv'
datas = [['hello', 'girl'],
['hi', 1],
['oh', 2],
['yeah', 3]]
with open(filename, 'w', newline='') as f:
w = csv.writer(f)
for row in datas:
w.writerow(row)
d = 
for i in range(1):
with open(filename) as f:
datas = csv.reader(f)
for data in datas:
print(data)
# print(d)
with open(filename, 'w', newline='') as f:
w = csv.writer(f)
for row in d:
w.writerow(row)
time.sleep(1)
while true:
print('如果想清除資料，請輸入(y/y)，如果想退出系統，請輸入(n/n): ')
a = input()
if (a == 'y') or (a == 'y'):
d = 
with open(filename, 'w', newline='') as f:
w = csv.reader(f)
for row in d:
w.writerow(row)
print('資料已經清空！')
break
elif (a == 'n') or (a == 'n'):
print('資料保留，退出系統成功！')
sys.exit()
else:
print('請按要求輸入！')

——韓寒《平凡之路》

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