如何统计df中不用数值的个数是多少 用一行代码实现
import pandas as pd
import numpy as np
df = pd.DataFrame(data={'a': [1, 4, np.NaN], "b": [np.NaN, 33,np.NaN],})
res =len(df) - df.count()
print(res)
import pandas as pd
import numpy as np
df = pd.DataFrame(data={'a': [1, 4, np.NaN], "b": [np.NaN, 33,np.NaN],})
res =len(df) - df.count()
print(res)