﻿ Pandas: Display memory usage of a given DataFrame and every column of the DataFrame - w3resource

# Pandas: Display memory usage of a given DataFrame and every column of the DataFrame

## Pandas: DataFrame Exercise-71 with Solution

Write a Pandas program to display memory usage of a given DataFrame and every column of the DataFrame.

Sample Solution :

Python Code :

``````import pandas as pd
df = pd.DataFrame({
'Name': ['Alberto Franco','Gino Mcneill','Ryan Parkes', 'Eesha Hinton', 'Syed Wharton'],
'Date_Of_Birth ': ['17/05/2002','16/02/1999','25/09/1998','11/05/2002','15/09/1997'],
'Age': [18.5, 21.2, 22.5, 22, 23]
})
print("Original DataFrame:")
print(df)
print("\nGlobal usage of memory of the DataFrame:")
print(df.info(memory_usage = "deep"))
print("\nThe usage of memory of every column of the said DataFrame:")
print(df.memory_usage(deep = True))
``````

Sample Output:

```Original DataFrame:
Name Date_Of_Birth    Age
0  Alberto Franco     17/05/2002  18.5
1    Gino Mcneill     16/02/1999  21.2
2     Ryan Parkes     25/09/1998  22.5
3    Eesha Hinton     11/05/2002  22.0
4    Syed Wharton     15/09/1997  23.0

Global usage of memory of the DataFrame:
<class 'pandas.core.frame.DataFrame'>
RangeIndex: 5 entries, 0 to 4
Data columns (total 3 columns):
Name              5 non-null object
Date_Of_Birth     5 non-null object
Age               5 non-null float64
dtypes: float64(1), object(2)
memory usage: 801.0 bytes
None

The usage of memory of every column of the said DataFrame:
Index              80
Name              346
Date_Of_Birth     335
Age                40
dtype: int64
```

Python-Pandas Code Editor:

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## Python: Tips of the Day

Inserting if statements using conditional list comprehensions:

```x = [1, 2, 3, 4, 5, 6]
result = []
for idx in range(len(x)):
if x[idx] % 2 == 0:
result.append(x[idx] * 2)
else:
result.append(x[idx])
result
```

Output:

```[1, 4, 3, 8, 5, 12]
```
`[(element * 2 if element % 2 == 0 else element) for element in x]`

Output:

```[1, 4, 3, 8, 5, 12]
```
`[element * 2 for element in x if element % 2 == 0]`

Output:

```[4, 8, 12]
```