從python腳本插入mysql變量

Question

基本上，我試圖將結果從超聲波傳感器發送到mysql db。 我可以發送手動輸入到INSERT的數據。 但是，我無法發送可變結果。

這是獲取數字的腳本：

elapsed = stop - start    
# Distance pulse travelled in that time is time
# multiplied by the speed of sound (cm/s)
distance = elapsed * speedSound

# That was the distance there and back so halve the value
distance = distance / 2
distance = '{:f}'.format(distance)
print(distance)

結果看起來像6.110798。

然后，我嘗試將其發送給數據庫：

# Open database connection
db = MySQLdb.connect("192.168.2.3","DB","**********","Ultrasonic_IoT" )

# prepare a cursor object using cursor() method
cursor = db.cursor()

# Prepare SQL query to INSERT a record into the database.
sql = "INSERT INTO Pi (distance) VALUES (%distance)"

try:

    # Execute the SQL command
    cursor.execute(sql)
    # Commit your changes in the database
    db.commit()

except:
    # Rollback in case there is any error
    db.rollback()

    # disconnect from server
    db.close()

我在VALUE中嘗試了不同的組合，但是仍然遇到問題。

Answer 1

好的，這就是竅門

sql = "INSERT INTO UltraSonic (distance) VALUES (%s)"

嘗試：＃執行SQL命令cursor.execute（sql，（distance））