Python从SQLite3数据库检索信息
这是我目前的代码,其中一些变量是占位符。我要做的是从我创建的数据库中提取信息,并将其分配给变量,以便在计算平均值时使用它们。fetchall返回一个行列表,其中每行是一个元组,在本例中包含六个值 您可以浏览此列表,但除非需要对所有行进行随机访问,否则最好将光标用作迭代器:Python从SQLite3数据库检索信息,python,database,sqlite,Python,Database,Sqlite,这是我目前的代码,其中一些变量是占位符。我要做的是从我创建的数据库中提取信息,并将其分配给变量,以便在计算平均值时使用它们。fetchall返回一个行列表,其中每行是一个元组,在本例中包含六个值 您可以浏览此列表,但除非需要对所有行进行随机访问,否则最好将光标用作迭代器: import sqlite3 Class = str(input("Which class are you in? A) 11A B) 11B C) 11C")) f_name = str(input("What is yo
import sqlite3
Class = str(input("Which class are you in? A) 11A B) 11B C) 11C"))
f_name = str(input("What is your first name?"))
s_name = str(input("What is your surname?"))
h_score = "8"
a_score = "7"
t_taken = "3"
if Class == "11A" or "11a":
counter = 0
while counter < 1:
db_students = sqlite3.connect('//persian/controlledassessment$/work/11 C CS/10BakeEd/Python/Task 2/db_Students.db')
c=db_students.cursor()
c.execute('''CREATE TABLE IF NOT EXISTS ClassA
(student_firstname text,
student_surname text,
h_score number,
a_score number,
t_taken number,
Class text)
''')
c.execute('''INSERT INTO ClassA
VALUES (?, ?, ?, ?, ?, ?)''',(f_name, s_name, h_score, a_score, t_taken, Class))
db_students.commit()
c.execute("SELECT * FROM ClassA")
fetchall=c.fetchall()
print(fetchall)
db_students.close()
counter = counter + 1
elif Class == "11B" or "11b":
print()
elif Class == "11C" or "11c":
print()
else:
print("")
如果要计算平均值,最好直接在SQL中进行计算:
c.execute(...)
for row in c:
print(c[0]) # prints all first names
else:
pass # no rows found
可能不相关:if Class==11A或11A:不做您认为它做的事情。您希望使用11A中的if类,11A:或if Class.lower==11A:。另外,不需要对输入的结果调用str。
c.execute("SELECT AVG(h_score), AVG(a_score) FROM ClassA WHERE Class LIKE '11a'")
avg_h, avg_a = c.fetch()