逐行读取文件中的行到一个数组中的元素在Python
问题描述:
所以在Ruby中我可以做到以下几点:逐行读取文件中的行到一个数组中的元素在Python
testsite_array = Array.new
y=0
File.open('topsites.txt').each do |line|
testsite_array[y] = line
y=y+1
end
如何将一个做到这一点在Python?
答
testsite_array = []
with open('topsites.txt') as my_file:
for line in my_file:
testsite_array.append(line)
这是可能的,因为Python允许您直接遍历文件。
或者,更简单的方法,使用f.readlines()
:
with open('topsites.txt') as my_file:
testsite_array = my_file.readlines()
答
只要打开该文件,并使用readlines()
功能:
with open('topsites.txt') as file:
array = file.readlines()
答
在蟒可以使用文件对象的readlines
方法。
with open('topsites.txt') as f:
testsite_array=f.readlines()
或者干脆用list
,这是一样的使用readlines
但唯一不同的是,我们可以通过一个可选的大小参数readlines
:
with open('topsites.txt') as f:
testsite_array=list(f)
帮助上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.