BUG: str dtype ignored for column with '.' if thousands='.' for python engine

BUG: str dtype ignored for column with '.' if thousands='.' for python engine: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). data = """a;b;c\n0000.7995;16.000;0\n3.03.001.00514;0;4.000\n4923.600.041;23.000;131"""