Question

我正在尝试解析具有结构的文件：

0   rs41362547  MT  10044
1   rs28358280  MT  10550
...

依此类推，我希望每一行中的第二件事都放入一个数组中。我知道这应该很容易，但经过大量的搜索，我仍然迷失了。我是python的新手，这样做的脚本是什么？

谢谢！

Answer 1

您可以使用str.split分割线条：

with open('file.txt') as infile:
    result = []
    for line in infile: #loop through the lines
        data = line.split(None, 2)[1] #split, get the second column
        result.append(data) #append it to our results
        print data #Just confirming

Answer 2

这将有效：

with open('/path/to/file') as myfile:       # Open the file
    data = []                               # Make a list to hold the data
    for line in myfile:                     # Loop through the lines in the file
        data.append(line.split(None, 2)[1]) # Get the data and add it to the list
print (data)                                # Print the finished list

这里的重要部分是：

str.split，根据空格分隔行。
with-statement，完成后自动为您关闭文件。

请注意，您还可以使用list comprehension：

with open('/path/to/file') as myfile:
    data = [line.split(None, 2)[1] for line in myfile]
print (data)

如何使用python和文件解析从每一行中获取第二件事

2 个答案: