Pandas value.count()错误

import pandas as pd

# 创建一个示例DataFrame
df = pd.DataFrame({
    'A': [1, 2, None, 4],
    'B': [5, None, 7, 8]
})

# 计算整个DataFrame的非NA值数量
total_non_na = df.count().sum()
print(total_non_na)  # 输出: 6

# 计算列'A'的非NA值数量
count_A = df['A'].count()
print(count_A)  # 输出: 3

# 计算第0行的非NA值数量
count_row_0 = df.iloc[0].count()
print(count_row_0)  # 输出: 2

# 错误示例
try:
    count_value = df['A'].value.count()
except AttributeError as e:
    print(e)  # 输出: 'numpy.ndarray' object has no attribute 'count'