如何从 python 中的查询结果中删除“小数”

Question

I have this code:

sql = "SELECT AVG(status = 2)*100 AS percentagem FROM voosinfo WHERE Date = %s"
cursor.execute(sql, (user_input,))

records = cursor.fetchone()
print(records)

Answer 1

Python has two ways of formatting objects as strings, one is the str method and one is the repr method. The str value is meant to be the human readable representation of the object, while the repr value is meant as a more complete debug representation.

When printing a string, it will print the str value. However, the fetchone method likely returns a tuple or a list. For these types, the str representation will include the repr representation of all the items.

It is up to you to format the string, but if you want eg a comma separated list, try

print(', '.join(records))

or if you know you have a single record, try

record, = records
print(record)