def check_float(string):  #支付時(shí)，輸入的金額可能是小數(shù)，也可能是整數(shù)  s = str(string)  if s.count('.') == 1: # 判斷小數(shù)點(diǎn)個(gè)數(shù)    sl = s.split('.') # 按照小數(shù)點(diǎn)進(jìn)行分割    left = sl[0] # 小數(shù)點(diǎn)前面的    right = sl[1] # 小數(shù)點(diǎn)后面的    if left.startswith('-') and left.count('-') == 1 and right.isdigit():      lleft = left.split('-')[1] # 按照-分割，然后取負(fù)號(hào)后面的數(shù)字      if lleft.isdigit():        return False    elif left.isdigit() and right.isdigit():      # 判斷是否為正小數(shù)      return True  elif s.isdigit():    s = int(s)    if s != 0:      return True  return False