arrays - Convert numpy arry to csv file in python -


i want save numpy array csv file in python

for example given following array 

a = [[1,2,3], [4,5,6], [7,8,9]]

i have csv file :

 1   4    7  2   5    8  3   6    9

my code bellow gives me result : 

a.tofile('file1.csv',sep=',')  result:  1 2 3 4 5 6 7 8 9

i have tried following code well

df = pd.dataframe(a)  df.to_csv("file2.csv", index=none)

which not give me desired result again 

1     2     3     4     5 6 7 8 9

i appreciate comments , suggestion.

you pd.dataframe(a).t.to_csv('file2.csv', index=false, header=none)

in [1210]: print pd.dataframe(a).t.to_csv(index=false, header=none) 1,4,7 2,5,8 3,6,9

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