现在我创建一个多列DataFrame ，如下所示： 
 
column1 = ["A","B","C"]
column2 = ["a","b","c"]
tuples = []
for c1 in column1:
    for c2 in column2:
        tuples += [(i1,i2)]
columns = pd.MultiIndex.from_tuples(tuples, names=['Large index', 'Small index'])        
q = pd.DataFrame(index = t, columns = columns )
q.loc[:, ("A","a")] = 1
 
 现在我想知道：是否有更简单的语法来提供相同的内容？ 干杯! 
 
 编辑：更正了错别字。 

Right now I create a multi-column DataFrame as following:
 
column1 = ["A","B","C"]
column2 = ["a","b","c"]
tuples = []
for c1 in column1:
    for c2 in column2:
        tuples += [(i1,i2)]
columns = pd.MultiIndex.from_tuples(tuples, names=['Large index', 'Small index'])        
q = pd.DataFrame(index = t, columns = columns )
q.loc[:, ("A","a")] = 1
 
Now I wonder: Is there an easier syntax to deliver the same? Cheers!
 
edit: Corrected typos.

原文：https://stackoverflow.com/questions/48099934