Answers for "lower case strings in a column"

pandas convert all column names to lowercase

# rename Pandas columns to lower case
df.columns= df.columns.str.lower()
df.columns
Index(['column1', 'column2', 'column3'], dtype='object')

change column names to lowercase

# Make the Column Names into Lower-Case:

# To make the Column Names All in Lower-Case:
dete_survey_updated.rename(columns = str.lower, inplace = True)