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 json 형식 문자열(str) - 딕셔너리(dict) 변환

by joviansummer
original STEEMIT post: https://steemit.com/blog/@joviansummer/json-str-dict


json 형식과 파이썬의 딕셔너리(dict)는 형식이 동일합니다. 파이썬에서 json 모듈을 이용하면 json 형식의 문자열을 딕셔너리로 변환할 수 있습니다. json.loads()를 사용합니다.

import json
# json 형식의 문자열
fruits_json = '{ "apple":10, "orange":3, "banana":7 }'
# 딕셔너리로 변환
fruits_dict = json.loads(fruits_json)

위의 예시에서 fruits_json은 문자열(str)이고 fruits_dict는 딕셔너리(dict)입니다.

print(fruits_dict['orange'])

3

반대로 딕셔너리를 json 형식 문자열로 바꾸려면 json.dumps()를 사용합니다.

# 딕셔너리
scores_dict = { 'bob':83, 'john':92, 'jane':93 }
# json 형식 문자열로 변환
scores_json = json.dumps(scores_dict)

위의 예시에서 scores_dict는 딕셔너리이고 scores_json은 문자열입니다.

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