pytthon combien de vendredis entre deux dates
from datetime import date
d1 = date(2017, 1, 4)
d2 = date(2017, 1, 31)
count = 0
for d_ord in range(d1.toordinal(), d2.toordinal()):
d = date.fromordinal(d_ord)
if (d.weekday() == 4):
count += 1
print(count)
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