﻿ Pandas: Get lowest n records within each group of a given DataFrame - w3resource

# Pandas: Get lowest n records within each group of a given DataFrame

## Pandas: DataFrame Exercise-81 with Solution

Write a Pandas program to get lowest n records within each group of a given DataFrame.

Sample Solution :

Python Code :

``````import pandas as pd
d = {'col1': [1, 2, 3, 4, 7, 11], 'col2': [4, 5, 6, 9, 5, 0], 'col3': [7, 5, 8, 12, 1,11]}
df = pd.DataFrame(data=d)
print("Original DataFrame")
print(df)
print("\nLowest n records within each group of a DataFrame:")
df1 = df.nsmallest(3, 'col1')
print(df1)
df2 = df.nsmallest(3, 'col2')
print(df2)
df3 = df.nsmallest(3, 'col3')
print(df3)
``````

Sample Output:

```Original DataFrame
col1  col2  col3
0     1     4     7
1     2     5     5
2     3     6     8
3     4     9    12
4     7     5     1
5    11     0    11

Lowest n records within each group of a DataFrame:
col1  col2  col3
0     1     4     7
1     2     5     5
2     3     6     8
col1  col2  col3
5    11     0    11
0     1     4     7
1     2     5     5
col1  col2  col3
4     7     5     1
1     2     5     5
0     1     4     7
```

Python-Pandas Code Editor:

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## Python: Tips of the Day

Getting rid of unwanted characters:

You can get rid of whitespaces or any specific character using strip methods in Python. You can use either plain strip for both sides, lstrip for the left side and rstrip for the right side only.

```str="+++Welcome python+++"
str.strip()

print(str)```

Output:

`+++Welcome python+++`