how to slice dataframe in pandas code example

Example 1: make new dataframe from slice

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

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

Example 2: slicing in pandas

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

Example 3: slicing in pandas

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