我在嘗試使用python腳本將數據從csv文件導入到sqlite數據庫。Python:將數據從大型csv導入到sqlite數據庫
我的CSV行如下:(在從quandle下載的excel工作表)
Date Open High Low Last Close TotTrQt Turnover (Lacs)
2017-05-26 2625 2626.85 2564.65 2570.05 2578.25 681275 17665.43
2017-05-25 2577 2637.55 2568 2615.05 2624.6 2047047 53333.77
2017-05-24 2534.8 2570 2529.65 2567.1 2559.15 1267274 32252.28
2017-05-23 2533.2 2564.15 2514 2523.7 2521.7 1374298 34776.45
2017-05-22 2510 2553.75 2510 2535 2531.35 831970 21054.61
2017-05-19 2536.2 2540.55 2486 2503.85 2507.15 893022 22384.3
2017-05-18 2450 2572 2442.25 2525 2536.2 2569297 64894.78
2017-05-17 2433.5 2460.75 2423 2450 2455.35 1438099 35137.29
2017-05-16 2380 2435 2373.45 2425.1 2429.15 1800513 43397.03
2017-05-15 2375.1 2377.95 2341.6 2368 2365.1 908802 21380.43
爲了產生DB表,我已經使用下面的腳本:
import sqlite3
try:
db = sqlite3.connect('NSETCS')
cursor=db.cursor()
print 'Executing: Create Table SQL'
cursor.execute('''CREATE TABLE NSETCS (DATE TEXT, OPEN REAL, HIGH REAL, LOW REAL, LAST REAL, CLOSE REAL,\
TOTALTRADEQUANTITY REAL, TURNOVER REAL)''')
##since above statment is DDL, no explicit commit is reqd
except Exception as E:
print "Error=",E
finally:
db.close()
用於插入數據在表格的特定行中,我使用下面的腳本,但是由於浮點轉換給出錯誤,所以數據插入失敗,任何指導都將非常值得讚賞。
import sqlite3
try:
infile = open (r'F:\mypractise_python\day11\NSE-TCS.csv','r')
content = infile.readlines()
except IOError as E:
print "Error: ", E
try:
db = sqlite3.connect('NSETCS')
cursor = db.cursor()
for line in content:
line =line.strip()
columns = line.split(',')
if line == '' or columns[0] == 'Date':
continue
date = columns[0].strip()
open_stock = float(columns[1].strip())
high = float(columns[2].strip())
low = float(columns[3].strip())
last= float(columns[4].strip())
close= float(columns[5].strip())
tot_trade_qt= float(columns[6].strip())
turnover= float(columns[7].strip())
cursor.execute('''insert into NSETCS values (:date, :open_stock, :high, :low, :last, :close, :tot_trade_qt, :turnover)''',\
{'date':date, 'open_stock':open_stock, 'high':high, 'low':low, 'last':last, 'close':close,\
'tot_trade_qt':tot_trade_qt, 'turnover':turnover})
except Exception as E:
print "Error:", E
else:
db.commit()
db.close()
infile.close()
任何錯誤信息? –
給我們舉例你的CSV行 –
錯誤:無法將字符串轉換爲浮動。 –