题解 | #牛客网的每日练题量#
牛客网的每日练题量
https://www.nowcoder.com/practice/c5307933102d47c6895679bc62c9e5a9
import pandas as pd
df = pd.read_csv('nowcoder.csv',delimiter=',',dtype=object)
df['date'] = pd.to_datetime(df['date'],format='%Y-%m-%d')
dec = df[df['date'].dt.month == 12]
# 获取时间格式中制定的月份
print(dec.groupby('date')['user_id'].count())
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