1
我有一個數據幀,其中有列'flow1,flow2,flow3' 我需要提取我可以從列中獲得的不同順序。提取數據幀中列名的組合
df1 = pd.read_csv("Desktop/lab9/cleaning1/1160/flow.tsv", sep = "\t", header = None, na_values=[" "])
df1.columns = ['flow1', 'flow2', 'flow3']
for p in permutations(df1.columns, 3):
print p
這是給我
('flow1', 'flow2', 'flow3')
('flow1', 'flow3', 'flow2')
('flow2', 'flow1', 'flow3')
('flow2', 'flow3', 'flow1')
('flow3', 'flow1', 'flow2')
('flow3', 'flow2', 'flow1')
但我只需要:
('flow1', 'flow2', 'flow3')
('flow1', 'flow3', 'flow2')
('flow2', 'flow3', 'flow1')
任何理由你不需要別人?從3種替代品中進行選擇時,總的獨特排列是3! = 6,正如函數'permutations'給出的那樣。你爲什麼只想要那三個? – Kartik