>>> pd.read_csv("wspace.csv", header=None, delim_whitespace=True)
    0     1     2    3
0 NaN   9.0   3.3  4.0
1 NaN  32.3  44.3  5.1
2 NaN   7.2   1.1  0.9
>>> pd.read_csv("wspace.csv", header=None, sep=r"\s+")
      0     1    2
0   9.0   3.3  4.0
1  32.3  44.3  5.1
2   7.2   1.1  0.9