import numpy as np
import pandas as pd
df = pd.read_csv("C:\\Users\\Admin\\Desktop\\202107030600.csv")
tt = df['batch_time']
dd = df.iloc[:, 0].apply(lambda x: str(x)[8:])
data = (lambda y: tt.appand('08') if dd < "1200" else tt.append('20'))
# print(ff)
print(data)
print(df)
df["test1"] = data
df.to_csv('test.csv')
<function <lambda> at 0x0000019CBA4D6430>
lambda算出的值不显示,只有<function at 0x0000019CBA4D6430>