[英]Making lists from multiple lines in a text file (Python)
I am trying to turn a text file into multiple lists but I am unsure how, say for example the text file is: 我试图将文本文件转换为多个列表,但我不确定如何,例如文本文件是:
Bob 16 Green
Sam 19 Blue
Sally 18 Brown
I then want to make three lists, 然后我想制作三个清单,
[Bob, Sam, Sally] , [16, 19, 18], [Green, Blue, Brown]
thanks 谢谢
Keeping tokens as strings (not converting integers or anything), using a generator comprehension: 使用生成器理解将令牌保持为字符串(不转换整数或任何东西):
Iterate on the file/text lines, split your words and zip
the word lists together: that will "transpose" the lists the way you want: 迭代文件/文本行,拆分单词并将单词列表zip
在一起:这将按您希望的方式“转置”列表:
f = """Bob 16 Green
Sam 19 Blue
Sally 18 Brown""".splitlines()
print (list(zip(*(line.split() for line in f))))
result (as a list of tuples): 结果(作为元组列表):
[('Bob', 'Sam', 'Sally'), ('16', '19', '18'), ('Green', 'Blue', 'Brown')]
*
unpacks the outer generator comprehension as arguments of zip
. *
解压缩外部生成器理解作为zip
参数。 results of split
are processed by zip
. split
结果由zip
处理。
Even simpler using map
which avoids the generator expression since we have split
handy, ( str.split(x)
is the functional notation for x.split()
) (should even be slightly faster): 即使使用简单的map
,避免了发电机表达,因为我们已经split
得心应手,( str.split(x)
是功能性符号x.split()
甚至要稍快一些):
print (list(zip(*map(str.split,f))))
Note that my example is standalone, but you can replace f
by a file handle all right. 请注意,我的示例是独立的,但您可以通过文件句柄替换f
。
A simple oneliner, assuming you load the file as a string: 假设您将文件作为字符串加载,这是一个简单的oneliner:
list(zip(*[line.split(' ') for line in filecontent.split('\n')]))
I first split it at all the new lines, each of those at all of the spaces, and then flip it ( zip
-operator) 我首先将它拆分为所有新行,每行所有空格,然后翻转它( zip
-operator)
the code below does what you want: 下面的代码可以满足您的需求:
names = []
ages = []
fav_color = []
flist=open('myfile.txt','r').read().split('\n')
for line in flist:
names.append(line.split(' ')[0])
ages.append(line.split(' ')[1])
fav_color.append(line.split(' ')[2])
print(names)
print(ages)
print(fav_color)
lines.txt has the text contents: lines.txt包含文本内容:
* *
Bob 16 Green
Sam 19 Blue
Sally 18 Brown
* *
Python code: Python代码:
with open ("lines.txt", "r") as myfile:
data = myfile.readlines()
for line in data:
list = [word for word in line.split()]
print list
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