将文件逐行读入 Python 中的数组元素
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Reading a file line by line into elements of an array in Python
提问by walterfaye
So in Ruby I can do the following:
所以在 Ruby 中，我可以执行以下操作：
testsite_array = Array.new
y=0
File.open('topsites.txt').each do |line|
testsite_array[y] = line
y=y+1
end
How would one do that in Python?
在 Python 中如何做到这一点？
采纳答案by Rushy Panchal
testsite_array = []
with open('topsites.txt') as my_file:
for line in my_file:
testsite_array.append(line)
This is possible because Python allows you to iterate over the file directly.
这是可能的，因为 Python 允许您直接遍历文件。
Alternatively, the more straightforward method, using f.readlines():
或者，使用更直接的方法f.readlines()：
with open('topsites.txt') as my_file:
testsite_array = my_file.readlines()
回答by Hunter McMillen
Just open the file and use the readlines()function:
只需打开文件并使用该readlines()功能：
with open('topsites.txt') as file:
array = file.readlines()
回答by Ashwini Chaudhary
In python you can use the readlinesmethod of a file object.
在python中，您可以使用readlines文件对象的方法。
with open('topsites.txt') as f:
testsite_array=f.readlines()
or simply use list, this is same as using readlinesbut the only difference is that we can pass an optional size argument to readlines:
或者简单地使用list，这与使用相同，readlines但唯一的区别是我们可以将一个可选的大小参数传递给readlines：
with open('topsites.txt') as f:
testsite_array=list(f)
help on file.readlines:
帮助file.readlines：
In [46]: file.readlines?
Type: method_descriptor
String Form:<method 'readlines' of 'file' objects>
Namespace: Python builtin
Docstring:
readlines([size]) -> list of strings, each a line from the file.
Call readline() repeatedly and return a list of the lines so read.
The optional size argument, if given, is an approximate bound on the
total number of bytes in the lines returned.
