- numpy.is_busday(dates, weekmask='1111100', holidays=None, busdaycal=None, out=None)¶
Calculates which of the given dates are valid days, and which are not.
New in version 1.7.0.
dates : array_like of datetime64[D]
The array of dates to process.
weekmask : str or array_like of bool, optional
A seven-element array indicating which of Monday through Sunday are valid days. May be specified as a length-seven list or array, like [1,1,1,1,1,0,0]; a length-seven string, like ‘1111100’; or a string like “Mon Tue Wed Thu Fri”, made up of 3-character abbreviations for weekdays, optionally separated by white space. Valid abbreviations are: Mon Tue Wed Thu Fri Sat Sun
holidays : array_like of datetime64[D], optional
An array of dates to consider as invalid dates. They may be specified in any order, and NaT (not-a-time) dates are ignored. This list is saved in a normalized form that is suited for fast calculations of valid days.
busdaycal : busdaycalendar, optional
A busdaycalendar object which specifies the valid days. If this parameter is provided, neither weekmask nor holidays may be provided.
out : array of bool, optional
If provided, this array is filled with the result.
out : array of bool
An array with the same shape as dates, containing True for each valid day, and False for each invalid day.
>>> # The weekdays are Friday, Saturday, and Monday ... np.is_busday(['2011-07-01', '2011-07-02', '2011-07-18'], ... holidays=['2011-07-01', '2011-07-04', '2011-07-17']) array([False, False, True], dtype='bool')