不能與列表

Question

格式化字符串我有這兩個領域

s = "SELECT * FROM %s WHERE %s = %s ORDER BY %s;" 
data = ['students', 'age', 12, 'desc'] 

從我所看到的，我計算列表足夠的元素來格式化字符串。 但

print s.format(data) 
#or 
print s % tuple(data) 
#or 
print s % data 

回報TypeError: not enough arguments for format string

Answer 1

只需將列表轉換爲元組，這樣

s, l = "SELECT * FROM %s WHERE %s = %s ORDER BY %s;",['students','age',12,'desc'] 
print s % tuple(l) 
# SELECT * FROM students WHERE age = 12 ORDER BY desc; 

Online Demo