在python中使用循环重命名多个数据帧的列

Question

我有以下代码：

ticker = ["IYR","IYZ","XLB","XLE","XLI","XLK","XLP","XLU","XLY","IYF"]

#downloading data and creating DFs
for ei in ticker:
  vars()[ei] = yf.download(ei, start="2015-01-01", end="2020-10-21",auto_adjust=True)

#Iterate over DFs in order to rename columns
for ei in ticker:
  vars()[ei].rename(columns={"Open":str(ei)+"_O", "High": str(ei)+"_H", "Low": str(ei)+"_L", "Close": str(ei)+"_C"})

但我不知道为什么，它没有重命名。 有什么帮助吗？ 谢谢

Answer 1

已解决：

for ei in ticker:
  vars()[ei]=vars()[ei].rename(columns={"Open":str(ei)+"_O", "High": str(ei)+"_H", "Low": str(ei)+"_L", "Close": str(ei)+"_C"})