pandas - Drop level from one specific column -

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inspired pandas: drop level multi-level column index?

i have multilevel dataframe:

  | l |     |   +---+---+---+   |   | b | c | --+---+---+---+ 0 | ¦ 1 | 2 | 1 | b ¦ 3 | 4 |

i need flatten column a @ level 0

so like:

  +---+---+---+   | l | b | c | --+---+---+---+ 0 | ¦ 1 | 2 | 1 | b ¦ 3 | 4 |

df.columns = df.columns.droplevel() produces

  +---+---+---+   |   | b | c | --+---+---+---+ 0 | ¦ 1 | 2 | 1 | b ¦ 3 | 4 |

i struggling produce toy example well

try this

df.columns = [c[-1] c in df.columns]

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