Python——从文件中读取行并将其拆分
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Python -- Reading lines from file and split it
提问by Marc Ortiz
I'm trying to split the lines from a .txt file stored locally. What I do to make a for loop but I want to start the loop on an specific index on the array. For example:
我正在尝试从本地存储的 .txt 文件中拆分行。我做了什么来创建 for 循环，但我想在数组的特定索引上开始循环。例如：
file_content = open('files/filefinal1_test.txt')
counter = 0
total_lines = 0
global l
index = 0 if l == "" else file_content.index(l)
for line in file_content[index:]:
l = line
array_line =line.split('", "')
array_line[0] = array_line[0].replace('"', '')
array_line[1] = array_line[1].replace('"', '')
array_line[2] = array_line[2].replace('"', '')
array_line[3] = array_line[3].replace('"', '')
if (send_req(papi, array_line) == 1):
counter = counter + 1
total_lines = total_lines + 1
This gives me errors at : file_content[index:] It's there any way to start the loop at specific line from the file_content?
这给了我以下错误：file_content[index:] 有什么方法可以从 file_content 的特定行开始循环？
The fact it's that the code below works and loops the array :
事实上，下面的代码有效并循环数组：
for line in file_content:
l = line
array_line =line.split('", "')
array_line[0] = array_line[0].replace('"', '')
array_line[1] = array_line[1].replace('"', '')
array_line[2] = array_line[2].replace('"', '')
array_line[3] = array_line[3].replace('"', '')
if (send_req(papi, array_line) == 1):
counter = counter + 1
total_lines = total_lines + 1
Could anyone help me please?
有人可以帮我吗？
采纳答案by Marc Ortiz
I've fount the answer! I didn't call the method .readlines()
我已经找到答案了！我没有调用方法 .readlines()
file_content = file_content.readlines()
for lines in file_content[0:]:
#stuff
回答by rkrzr
You can use lines = open(filepath, 'rb').readlines()to get a list of strings, where each string is a line in your file. You can then slice the list at any index you want to only get the lines you are interested in like this: wanted_lines = lines[index:]This will get you all the lines from index to the end of the file.
您可以使用lines = open(filepath, 'rb').readlines()获取字符串列表，其中每个字符串都是文件中的一行。然后，您可以在任何索引处对列表进行切片，只获取您感兴趣的行，如下所示：wanted_lines = lines[index:]这将获取从索引到文件末尾的所有行。
回答by Steve Allison
You can use islicefrom the itertoolsmodule to create a slice over a file (or any iterable):
您可以使用islicefromitertools模块在文件（或任何可迭代的）上创建切片：
import itertools
with open('file') as f:
for line in itertools.islice(f, 3, 5): # 3 and 5 are the start and stop points
print line
see http://docs.python.org/2/library/itertools.html#itertools.islicefor more
有关更多信息，请参见http://docs.python.org/2/library/itertools.html#itertools.islice
