dataframe slice 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: make new dataframe from slice

# You need copy with boolean indexing, new DataFrame constructor is not necessary:

d2 = d1[d1.a > 1].copy()

Example 3: slicing in pandas

# iloc[row slicing, column slicing]
surveys_df.iloc[0:3, 1:4]

Example 4: slicing in pandas

# Select rows 0, 1, 2 (row 3 is not selected)
surveys_df[0:3]

Example 5: pandas df by row index

indices = [133, 22, 19, 203, 14, 1]
df_by_indices = df.iloc[indices, :]