Get first element of Series without knowing the index [duplicate]
Use iloc to access by position (rather than label):
In [11]: df = pd.DataFrame([[1, 2], [3, 4]], ['a', 'b'], ['A', 'B'])In [12]: dfOut[12]: A Ba 1 2b 3 4In [13]: df.iloc[0] # first row in a DataFrameOut[13]: A 1B 2Name: a, dtype: int64In [14]: df['A'].iloc[0] # first item in a Series (Column)Out[14]: 1