create pd12

Author: Mofan Zhou

numpy&pandas/12_selection.py

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+# View more python tutorials on my Youtube and Youku channel!!!
+
+# Youtube video tutorial: https://www.youtube.com/channel/UCdyjiB5H8Pu7aDTNVXTTpcg
+# Youku video tutorial: http://i.youku.com/pythontutorial
+
+import pandas as pd
+import numpy as np
+
+dates = pd.date_range('20130101', periods=6)
+df = pd.DataFrame(np.random.randn(6,4), index=dates, columns=['A', 'B', 'C', 'D'])
+
+print(df['A'], df.A)
+print(df[0:3], df['20130102':'20130104'])
+
+# select by label: loc
+print(df.loc['20130102'])
+print(df.loc[:,['A','B']])
+print(df.loc['20130102', ['A','B']])
+
+# select by position: iloc
+print(df.iloc[3])
+print(df.iloc[3, 1])
+print(df.iloc[3:5,0:2])
+print(df.iloc[[1,2,4],[0,2]])
+
+# mixed selection: ix
+print(df.ix[:3, ['A', 'C']])
+# Boolean indexing
+print(df[df.A > 0])
+
+