如果它們在 python 中有標題，我如何從文件中獲取數字並將它們作為整數讀取？

Question

我有一個包含一堆數字的文件，但有些標題使我無法做很多事情。 該文件如下所示：

x: 
1 2 3 4 

f: 
5 6 7 8

h:
9 10 11 12 13

所以我有這個程序，我相信它可以幫助我訪問這些號碼，但我收到一條關於它的錯誤消息。

filename = input('file: ')
f = open(filename, 'r')
output=[]
w, h = map(int,lines.split())
x=[]
for i, line in enumerate(f):
    if i == h:
        break
    x.append(map(int,line.split()[:w]))
output.append(x)

所以我嘗試對標題進行條帶化，但是我收到一條關於它是一個字符串等的錯誤消息。

filename = input('file: ')
f = open(filename, 'r')
output=[]
func = f.readline()
lines = func.strip('x').strip('f').strip('h').split()
w, h = map(int,lines.split())
x=[]
for i, line in enumerate(f):
    if i == h:
         break
    x.append(map(int,line.split()[:w]))
output.append(x)

有什么建議嗎？

Answer 1

例子

filename = input('filename: ')

with open(filename, 'r') as f:
    for line in f: # line one-by-one
        line = line.strip() # strip to check empty lines
        if line: # skip empty lines
            elements = line.split()
            print(elements[2]) # [column]

或者

filename = input('filename: ')

# get not empty lines
lines = []

with open(filename, 'r') as f:
    for line in f: # 
        line = line.strip() # strip to check empty lines
        if line: # skip empty lines
            elements = line.split()
            lines.append(elements)

# work with lines one-by-one

for line in lines: # 
    print(line[2]) # [column]

# direct access to any element 

print(lines[1][2]) # [row][column]