Pandas: Check memory occupied by DataFrame

# Import library
import pandas as pd

# Create a DataFrame
df = pd.DataFrame({
    'num_1e6': np.random.randn(1000000),
    'string': ['one']*1000000,
    'boolean': [True, False]*500000,
    'NaN': np.nan,
    'blank': ''
})

print(df.head(3))

    num_1e6 string  boolean  NaN blank
0  0.011071    one     True  NaN      
1  0.675186    one    False  NaN      
2 -0.541657    one     True  NaN

# Memory usage: 1
m1 = df.memory_usage()

# Memory usage: 2
m2 = df.memory_usage(deep=True)

# Output
print('Memory usage (default) in bytes: \n', m1, '\n\n')
print('Memory usage (deep=True) in bytes: \n', m2)