[英]Reading data separated by colon per line in Python
I'm creating a program that has the user's name and their answers to a guess the number game in a database - like format on Python. 我正在创建一个程序,该程序具有用户名以及他们对数据库中数字游戏的猜测的答案-如Python上的格式。 I have created a text file where all of the users' data is, in the form name : guess.
我创建了一个文本文件,其中所有用户数据都以name:guess的形式存在。 For instance,
例如,
Dave:23
Adam:12
Jack:13
Dave:25
Adam:34
Now, I am trying to re - read the file into Python as a tuple, so I decided to use the line of code below (The real answer is 17): 现在,我试图将文件作为一个元组重新读入Python,所以我决定使用下面的代码行(真正的答案是17):
dict(line.split(':', 1) for line in open('guesses.txt'))
But this will just hand me back an empty line in the IDLE. 但这只会使我退回IDLE中的空白行。
Why is this not working? 为什么这不起作用?
To make it more simple, I need a tuple that has the user's name and then their guesses. 为了使其更简单,我需要一个具有用户名和其猜测的元组。
My dictionary should look like this: 我的字典应如下所示:
{'Dave': 23 25, 'Jack' : 13, 'Adam' : 13 34}
Thanks, Delbert. 谢谢,德尔伯特。
from collections import defaultdict
result = defaultdict(list)
with open("guesses.txt") as inf:
for line in inf:
name, score = line.split(":", 1)
result[name].append(int(score))
which gets you 这让你
# result
{ "Dave": [23, 25], "Jack": [13], "Adam": [12, 34] }
Use a defaultdict and store values in a list: 使用defaultdict并将值存储在列表中:
s="""Dave:23
Adam:12
Jack:13
Dave:25
Adam:34
"""
from collections import defaultdict
d = defaultdict(list)
for line in s.splitlines():
name,val = line.split(":")
d[name].append(int(val))
print(d)
defaultdict(<class 'list'>, {'Jack': [13], 'Adam': [12, 34], 'Dave': [23, 25]})
So for your file just do the same: 因此,对于您的文件,请执行以下操作:
d = defaultdict(list)
with open('guesses.txt') as f:
for line in f:
name,val = line.split(":")
d[name].append(int(val))
Your own code should return {'Jack': '13', 'Dave': '25', 'Adam': '34'}
where the the values for Dave and Adam are overwritten in the last two lines hence the need to store values in a list and append. 您自己的代码应返回
{'Jack': '13', 'Dave': '25', 'Adam': '34'}
,其中Dave和Adam的值在最后两行被覆盖,因此需要存储列表中的值并追加。
You also cannot use tuples as you mentioned in your answer without creating new tuples each time you want to add a new value as tuples are immutable . 由于元组是不可变的,因此每次您要添加新值时也不能创建新元组,就不能使用答案中提到的元组。
You can print(dict(d))
or use pprint
if you don't want the defaultdict(<class 'list'>,)
如果不想使用
defaultdict(<class 'list'>,)
pprint
defaultdict(<class 'list'>,)
可以print(dict(d))
或使用pprint
from pprint import pprint as pp
pp(d)
{'Adam': ['12', '34'],
'Dave': ['23', '25'],
'Jack': ['13']}
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