import pandas as pd
Nowcoder = pd.read_csv('Nowcoder.csv',sep=',')

Nowcoder['Achievement_value']>500

# print(Nowcoder[Nowcoder['Num_of_exercise']>=500][['Level','Achievement_value']])
# print(Nowcoder.query("Num_of_exercise>=500")[['Level','Achievement_value']])
print(Nowcoder.query("Num_of_exercise>=500").loc[:,['Level','Achievement_value']])