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November 24, 2020 06:00
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时间计算
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| import sys | |
| def calculate(params, tm): | |
| ex_stack = [] | |
| tmp = [] | |
| mutil = [] | |
| for p in params: | |
| if (not p): | |
| continue | |
| if (p is '('): | |
| ex_stack.append(p) | |
| continue | |
| if (p is '='): | |
| # 不符合规则 | |
| if (not ex_stack): | |
| return '' | |
| num_tmp = [] | |
| for i in range(len(ex_stack)): | |
| last = ex_stack[-1] | |
| if (last.isdigit()): | |
| num_tmp.insert(0, ex_stack.pop()) | |
| str = ''.join(num_tmp) | |
| tmp.append(str) | |
| continue | |
| if (p is '*' or p is 'x'): | |
| # 不符合规则 | |
| if (not ex_stack): | |
| return '' | |
| mutil.append(ex_stack.pop()) | |
| continue | |
| if (p.isdigit() or p is '-'): | |
| if (tmp): | |
| tmp.append(p) | |
| elif (mutil): | |
| mutil.append(p) | |
| else: | |
| ex_stack.append(p) | |
| continue | |
| if (p is ','): | |
| # 不符合规则 | |
| if not (tmp and len(tmp) > 1): | |
| return '' | |
| num = tmp[0] | |
| # 不符合规则 | |
| if (not num.isdigit()): | |
| return '' | |
| ex = ''.join(tmp[1:]) | |
| rs = multi_num(ex, int(num)) | |
| tmp = [] | |
| ex_stack.append(rs) | |
| continue | |
| if (p is ')'): | |
| # 不符合规则 | |
| if not (tmp and len(tmp) > 1): | |
| return '' | |
| num = tmp[0] | |
| # 不符合规则 | |
| if (not num.isdigit()): | |
| return '' | |
| ex = ''.join(tmp[1:]) | |
| rs = multi_num(ex, int(num)) | |
| tmp = [] | |
| ex_stack.append(rs) | |
| if (ex_stack): | |
| ex_tmp = [] | |
| for i in range(len(ex_stack)): | |
| last = ex_stack.pop() | |
| if last is '(': | |
| break | |
| elif last is not '(': | |
| ex_tmp.insert(0, last) | |
| rs = add_num(ex_tmp) | |
| ex_stack.append(rs) | |
| # 不符合规则 | |
| if not (mutil and len(mutil) > 1): | |
| return '' | |
| ex = mutil[0] | |
| num = ''.join(mutil[1:]) | |
| # 不符合规则 | |
| if (not num.isdigit()): | |
| return '' | |
| rs = multi_num(ex, int(num)) | |
| ex_stack.append(rs) | |
| # 表达式的全部的元素 | |
| seri = add_num(ex_stack) | |
| seri = seri.replace(',', '') | |
| # 时间换算 | |
| tl = tm.split(':') | |
| min = tl[0] | |
| # 不符合规则 | |
| if (not min.isdigit()): | |
| return '' | |
| total = int(min) * 60 | |
| if(len(tl) == 2): | |
| sec = tl[1] | |
| # 不符合规则 | |
| if (not sec.isdigit()): | |
| return '' | |
| total += int(sec) | |
| return seri[0:total] | |
| def multi_num(ex, num): | |
| rs = [] | |
| for i in range(num): | |
| rs.append(str(ex)) | |
| return ','.join(rs) | |
| def add_num(ex_stack): | |
| return ','.join(ex_stack) | |
| if __name__ == "__main__": | |
| params = sys.argv[1] | |
| tm = sys.argv[2] | |
| print('start !!!') | |
| print(params) | |
| print(tm) | |
| rs = calculate(params, tm) | |
| print(rs) |
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时间的表达式：
params = '(3=0,4=-1,3=1)+(10=1,47=0,3=-1)*10'
时间表达式：
tm = '2:10'
计算需要的参数：
calculate(params, tm)
得到的结果是以时间为准：
'000-1-1-1-1111111111111100000000000000000000000000000000000000000000000-1-1-111111111110000000000000000000000000000000000000000000'