级数的真值是模糊的。如何修复此错误？[副本]

Question

我正在尝试仅为具有if条件的行绘制一个图形。据我所知，这就是我所做的。

b = pd.read_csv('Zlatan_ClubComp.csv')

print(b.head())

if (b['Competition_Type'] == 'League'):
    pp = sns.pairplot(b, y_vars=['Appearances'], x_vars=['Goals_PerGame', 'Minutes_PerGoal'], hue="Club")
    plt.show()

Zlatan_ClubComp是我从中获取数据的csv文件。我已经运行了代码，这是我得到的错误，

Traceback (most recent call last):
  File "C:/Users/Siddhardh/Desktop/Python/Projects/Zlatan_Analysis/PairPlots.py", line 13, in <module>
    if (b['Competition_Type'] == "League"):
  File "C:\Users\Siddhardh\Desktop\OiDS Project\Zlatan_Analysis\lib\site-packages\pandas\core\generic.py", line 1555, in __nonzero__
    self.__class__.__name__
ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().

通过我的谷歌搜索，我知道pandas认为条件语句的真值是不明确的。但是，我似乎无法解决这个问题。

Answer 1

b = pd.read_csv('Zlatan_ClubComp.csv')

print(b.head())

b = b[b['Competition_Type'] == 'League']

pp = sns.pairplot(b, y_vars=['Appearances'], x_vars=['Goals_PerGame', 'Minutes_PerGoal'], hue="Club")
    plt.show()