pandas 读取列数以及获取真实df长度(df.dropna)不好使情况下

读取时,不读取第一列


data = pd.read_csv('data.csv',index_col=0)

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df_length = 0

for i in df['列名'].values:
    if i is not np.nan:
        df_length += 1

print(df_length)

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