import pandas as pd
import numpy as np
# 创建一个 DataFrame
df = pd.DataFrame([
[1, 1, 1, 1],
[2, np.nan, None, ""]
])
# 使用 `count()` 函数统计每一列中不为 None 和 np.nan 的元素个数
counts = df.count()
print(counts)
import pandas as pd
import numpy as np
# 创建一个 DataFrame
df = pd.DataFrame([
[1, 1, 1, 1],
[2, np.nan, None, ""]
])
# 使用 `count()` 函数统计每一列中不为 None 和 np.nan 的元素个数
counts = df.count()
print(counts)
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