题解 | #Python用户的平均提交次数#

import pandas as pd

Nowcoder = pd.read_csv('Nowcoder.csv', sep=',')
# result = Nowcoder.query("Language=='Python'")["Number_of_submissions"].mean()
# result = Nowcoder.query("Language=='Python'").loc[:,"Number_of_submissions"].mean()
result = Nowcoder.loc[Nowcoder['Language']=='Python',"Number_of_submissions"].mean()

# print(round(result,1))
# print(result.round(1))
# print("%.1f" %result)
print("{:.1f}".format(result))