Counting events daily per year

Question

How to count in python how many events took place in a year, increasing? ( including absent days with the number of events unchanged and summing up the events that repeat) the dates itself are events, 1 date = 1 event

Example:

Thank you.

I would be grateful for help. Thank you

Asked By: Mihai Dudnic

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Source

Answer 1

Try something like this:

df['Date'] = pd.to_datetime(df['Date'], format='%d.%m.%y')
df.groupby('Date')['value'].sum().resample('D').asfreq().fillna(0).cumsum()

Output:

Date
2021-01-01    1.0
2021-01-02    1.0
2021-01-03    1.0
2021-01-04    3.0
2021-01-05    4.0
Freq: D, Name: value, dtype: float64

Answered By: Scott Boston

Counting events daily per year

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