如何使用結果計算下一個結果，然後計算下一個結果？

Question

我想使用公式的結果來計算下一個結果，然後在下一個結果等等，所以第四。

def waiting(element, start_waiting_time=0, service_time=1.2, interarrival=1, default=0): 
    if element == 1: 
     return max((start_waiting_time + service_time - interarrival, 0)) 
    elif element == 0: 
     return default 

def waiting_time(elements, start_time=0): 
    next_patient_waits = start_time 
    for i in elements: 
     next_patient_waits += waiting(i) 
     print("{:.1f}".format(next_patient_waits)) 

elements = [1, 1, 1] 
waiting_time(elements) 

此代碼返回輸出：

# 0.2, 0.4, 0.6 

我期待它返回的輸出：

#0, 0.2, 0.4 

我想第一waiting_time設置爲0，因爲start_waiting_time爲零。我是希望電腦會計算：

#For 1st item in elements: waiting_time = 0 
#For 2nd item in elements: waiting_time = (waiting time 1st element) + service_time - interarrival = 0 + 1.2 -1 = 0.2 
#For 3rd item in elements: waiting_time = (waiting time 2nd element) + service_time - interarrival = 0.2 + 1.2 -1 = 0.4 

Answer 1

您應該簡單地增加它之前打印next_patient_waits：

def waiting_time(elements, start_time=0): 
    next_patient_waits = start_time 
    for i in elements: 
     print("{:.1f}".format(next_patient_waits)) 
     next_patient_waits += waiting(i)