STEEM POWER retention ratio of top 50 witnesses

by joviansummer original STEEMIT post: https://steemit.com/blog/@joviansummer/steem-power-retention-ratio-of-top-50-witnesses Hello, this is @joviansummer(witness: @jswit). Some time ago there was a bit of discussion on discord witness chanel about witnesses' power-down/cashing-out. So out of curiosity I just checked current ratio of witnesses' own STEEM POWER(VESTS) and all-time producer reward(VESTS). The ratio is calculated by the following simple formula: ratio(%) = account's own SP(MV) / all-time producer reward SP(MV) * 100% Ratio value less than 100% indicates power-down. If witness does additional power-up or gets other types of reward(e.g., curation reward), the ratio may exceed 100%. This does not take witness' other accounts into consideration. All-time producer reward data is from @steemchiller's SDS API. Here is the result: rank account own_sp prod_sp ratio 1 justyy 2188.411MV 1284.2MV 170.41% 2 steemchiller 982.134MV 124...

파이썬에서 부동소수점(float) 수자 반올림 - round(), format()

by joviansummer
original STEEMIT post: https://steemit.com/blog/@joviansummer/float-round-format


파이썬에서 부동소수점 수자를 원하는 자리에서 반올림하고 싶을 때는 round() 함수로 간단히 할 수 있습니다.

x = 3.1456
# x를 소수점 2째 자리까지만 유효하도록 반올림하여 x_r에 할당
x_r = round(x,2)
print(x_r)

3.15

자리수를 맞추고 문자열(string)로 바꿀 수도 있습니다. format() 함수를 사용합니다.

# x를 소수점 2째 자리까지만 유효하도록 반올림하여 문자열(string) 형식으로 x_str에 할당 
x_str = format(x, '.2f')
print(x_str)

3.15

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