小白用PANDAS 经常报错,就大大帮忙解决

基本代码都是按照教材打上去或者复制上去的,不知道为什么莫名其妙报错
import pandas as pd

pd.set_option('expand_frame_repr', False)  # 当列太多时显示完整

# =====导入数据
df = pd.read_csv(
    r'D:\python\xbx_stock_2019\data\a_stock_201903.csv',
    encoding='gbk',
    skiprows=1
)

print(df.groupby('交易日期'))

然后报错是这样的

C:\Users\PC\anaconda3\python.exe D:/python/123/111.py
Traceback (most recent call last):
  File "D:/python/123/111.py", line 12, in <module>
    print(df.groupby('交易日期'))
  File "C:\Users\PC\anaconda3\lib\site-packages\pandas\core\frame.py", line 6717, in groupby
    return DataFrameGroupBy(
  File "C:\Users\PC\anaconda3\lib\site-packages\pandas\core\groupby\groupby.py", line 560, in __init__
    grouper, exclusions, obj = get_grouper(
  File "C:\Users\PC\anaconda3\lib\site-packages\pandas\core\groupby\grouper.py", line 811, in get_grouper
    raise KeyError(gpr)
KeyError: '交易日期'

Process finished with exit code 1