Lower Case Column Names In Pandas Dataframe

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Preliminaries

# Import modules
import pandas as pd

# Set ipython's max row display
pd.set_option('display.max_row', 1000)

# Set iPython's max column width to 50
pd.set_option('display.max_columns', 50)

Create an example dataframe

# Create an example dataframe
data = {'NAME': ['Jason', 'Molly', 'Tina', 'Jake', 'Amy'],
        'YEAR': [2012, 2012, 2013, 2014, 2014],
        'REPORTS': [4, 24, 31, 2, 3]}
df = pd.DataFrame(data, index = ['Cochice', 'Pima', 'Santa Cruz', 'Maricopa', 'Yuma'])
df
NAME REPORTS YEAR
Cochice Jason 4 2012
Pima Molly 24 2012
Santa Cruz Tina 31 2013
Maricopa Jake 2 2014
Yuma Amy 3 2014

Lowercase column values

# Map the lowering function to all column names
df.columns = map(str.lower, df.columns)
df
name reports year
Cochice Jason 4 2012
Pima Molly 24 2012
Santa Cruz Tina 31 2013
Maricopa Jake 2 2014
Yuma Amy 3 2014