题解 | #Python用户的平均提交次数#

# 导入pandas库并取别名pd
import pandas as pd

# 读取Nowcoder.csv文件,得到DataFrame对象nowcoder
nowcoder = pd.read_csv("Nowcoder.csv")
# 选取Language列值为Python的行,存储在python_users中
python_users = nowcoder[nowcoder["Language"] == "Python"]
# 选取python_users的Number_of_submissions列
# 使用mean()计算平均值,存储在submissions_mean中
submissions_mean = python_users["Number_of_submissions"].mean()
# 打印submissions_mean,格式化保留1位小数
print("%.1f" % submissions_mean)