how to slice columns in pandas code example
Example 1: dataframe slice by list of values
In [1]: df = pd.DataFrame({'A': [5,6,3,4], 'B': [1,2,3,5]})
In [2]: df
Out[2]:
A B
0 5 1
1 6 2
2 3 3
3 4 5
In [3]: df[df['A'].isin([3, 6])]
Out[3]:
A B
1 6 2
2 3 3
Example 2: pandas slicing from one column to another
df.loc[:, 'foo':'cat':2]
df.loc[:, :'bar']
df.loc[:, 'quz'::3]
df.loc[:, 'sat':'bar']
df.loc[:, 'sat':'bar':-1]
sat cat ant quz bar
df.loc[:, slice('quz',None, 2)]
df.loc[:, ['foo','bar','dat']]
Example 3: python - row slice dataframe by number of rows
df.iloc[[1, 5]]
df.iloc[1:6]
df.iloc[[1, 5], df.columns.get_loc('Shop')]
df.iloc[[1, 5], df.columns.get_indexer(['Shop', 'Category'])]
Example 4: get column pandas
column = df["column_name"]