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First solution in Clear category for Binary Count by Piotr.Helminiak
def checkio(number):
bin=""
x=0
while number>0:
if number%2==0:
bin='0'+bin
else:
bin='1'+bin
number=int(number/2)
for i in range(len(bin)):
if bin[i]=='1':
x+=1
return x
#These "asserts" using only for self-checking and not necessary for auto-testing
if __name__ == '__main__':
assert checkio(4) == 1
assert checkio(15) == 4
assert checkio(1) == 1
assert checkio(1022) == 9
Nov. 9, 2016