如何優化Python代碼？

Question

****輸入**** ['From'，'john@hotmail.com'，'Fri'，'Jan'，'14'，'22：16：24'，'2012']

**** ****計劃

words =[] 
HMS =[] 
hour_freq_list = {} 

for line in fHand: # 1st loop 
    line = line.strip() 
    if not line.startswith ('From '):continue 
    words = line.split() 
    HMS = words[5].split() 
    Hr, Mi, Se = HMS[0].split(":") 

    if Hr in hour_freq_list: 
      hour_freq_list[Hr] += 1 
    else: 
      hour_freq_list[Hr] = 1 
print (hour_freq_list) 

電流輸出

{'19': 1, '04': 3, '14': 1, '11': 6, '18': 1, '09': 2, '17': 2, '15': 2, '10': 3 
, '06': 1, '16': 4, '07': 1} 

所需的輸出

04 3 
06 1 
07 1 
09 2 
10 3 
11 6 
14 1 
15 2 
16 4 
17 2 
18 1 
19 1 

如何優化我的代碼以逐行獲取排序順序中的所需輸出？我需要更改哪些數據結構才能使代碼更好，更緊湊？

Answer 1

data = [['From', 'john@hotmail.com', 'Fri', 'Jan', '14', '22:16:24', '2012'], 
    ['From', 'john@hotmail.com', 'Fri', 'Jan', '14', '23:16:24', '2012'], 
    ['From', 'john@hotmail.com', 'Fri', 'Jan', '14', '21:16:24', '2012'], 
    ['From', 'john@hotmail.com', 'Fri', 'Jan', '14', '22:02:24', '2012'] 
    ] 

hour_frequency_list = {} 

for temp in data: 
    hour = temp[5].split(":")[0] 
    if hour in hour_frequency_list: 
    hour_frequency_list[hour] += 1 
    else: 
    hour_frequency_list[hour] = 1 

sorted_list = sorted(hour_frequency_list.items()) 

print ("hour | Occurences") 
for k in sorted_list: 
    print (k[0] + " |" + str(k[1])) 

輸出

hour | Occurences 
21 |1 
22 |2 
23 |1