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Question

我想所有這一切都通過逗號假設一個python文件（example.txt中）分離數之和數字的總和：包含喜歡的數字，

2,3,5,6,9 
1,5,6,9,4,5 
9,5 

Answer 1

在Python中讀取文件的標準方式是使用open()，然後使用read()或readlines()。見例如here。

要獲取數字，您需要將分隔線分隔並將它們轉換爲int。

最後sum()將總結列表中的所有元素。

#create an empty list to put numbers in 
a = [] 

#open file and read the lines 
with open("SO_sumofnumers.txt", "r") as f: 
    lines = f.readlines() 


for line in lines: 
    #split each line by the separator (",") 
    l = line.split(",") 
    for entry in l: 
     # append each entry 
     # removing line-end ("\n") where necessary 
     a.append(int(entry.split("\n")[0])) 

print a 
#sum the elements of a list 
s = sum(a) 
print s