Answers for "dataframe first row"

pandas return first row

df_test.iloc[0]
or
df_test['someColumnName'].iloc[0]

make first row columns pandas

new_header = df.iloc[0] #grab the first row for the header
df = df[1:] #take the data less the header row
df.columns = new_header #set the header row as the df header

first row as column df

df.rename(columns=df.iloc[0])

pandas take first n rows

df.iloc[:n]