﻿ Pandas: Use a local variable within a query - w3resource # Pandas: Use a local variable within a query

## Pandas: DataFrame Exercise-75 with Solution

Write a Pandas program to use a local variable within a query.

Sample Solution :

Python Code :

``````import pandas as pd
df = pd.DataFrame({'W':[68,75,86,80,66],'X':[78,85,96,80,86], 'Y':[84,94,89,83,86],'Z':[86,97,96,72,83]});
print("Original DataFrame")
print(df)
maxx = df["W"].max()
print("\nValues which are less than maximum value of 'W' column")
print(df.query("W < @maxx"))
``````

Sample Output:

```Original DataFrame
W   X   Y   Z
0  68  78  84  86
1  75  85  94  97
2  86  96  89  96
3  80  80  83  72
4  66  86  86  83

Values which are less than maximum value of 'W' column
W   X   Y   Z
0  68  78  84  86
1  75  85  94  97
3  80  80  83  72
4  66  86  86  83
```

Python-Pandas Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.

﻿

## Python: Tips of the Day

Join Strings in an Iterable:

```>>> words = ('Hello', 'Python', 'Programmers')
>>> '!'.join(words)
'Hello!Python!Programmers'
>>> words_dict = {0: 'zero', 1: 'one', 2: 'two', 3: 'three'}
>>> '&'.join(words_dict.values())
'zero&one&two&three'
```