blocks|key|2683035|text|name,+*line+=+input().split()行用空格分隔输入，将第一个项分配到name中，其余项作为列表分配给line，在下一行scores+=+list(map(float,+line))中，它被映射到scores中的一个浮点数列表。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2683036|entityMap^0|0|T|1A|4|1Q|4|1Z|V|31|6|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|G|$]]

The line <code>name, *line = input().split()</code> splits the input by white spaces, assigning the first item into <code>name</code>, and the rest of the items are assigned to <code>line</code> as a list, which, in the next line <code>scores = list(map(float, line))</code>, gets mapped to a list of floating numbers into <code>scores</code>.

blocks|key|4121463|text|name,+*line+=+input().split()+<---+doubt

input()++#+reads+single+line+of+input
#+'abc+23+34+45'

.split()++#+splits+it+into+a+list+of+whitespace+separated+tokens
#+['abc',+'23',+'34',+'45']

name,+*line+=+...++#+name+is+assigned+first+token,+line+a+list+of+the+remaining+tokens
name++#+'abc'
line++#++['23',+'34',+'45']

scores+=+list(map(float,+line))++#+maps+float+function+onto+the+list+of+strings
scores++#+[23.0,+34.0,+45.0]|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4121464|一些参考资料：|unstyled|4121465|4121466|map|unordered-list-item|offset|length|4121467|str.split|4121468|input|4121469|starred+assignment|4121470|4121471|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.python.org/3/library/functions.html#map|1|https://docs.python.org/3/library/stdtypes.html#str.split|2|https://docs.python.org/3/library/functions.html#input|3|https://www.python.org/dev/peps/pep-3132/#id4^0|0|0|0|0|3|0|0|0|9|1|0|0|5|2|0|0|I|3|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|18|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|19|8|@]|9|@]|A|$]]|$1|H|3|I|5|J|7|1A|8|@]|9|@$K|1B|L|1C|1|1D]]|A|$]]|$1|M|3|N|5|J|7|1E|8|@]|9|@$K|1F|L|1G|1|1H]]|A|$]]|$1|O|3|P|5|J|7|1I|8|@]|9|@$K|1J|L|1K|1|1L]]|A|$]]|$1|Q|3|R|5|J|7|1M|8|@]|9|@$K|1N|L|1O|1|1P]]|A|$]]|$1|S|3|-4|5|F|7|1Q|8|@]|9|@]|A|$]]|$1|T|3|-4|5|F|7|1R|8|@]|9|@]|A|$]]]|U|$V|$5|W|X|Y|A|$Z|10]]|11|$5|W|X|Y|A|$Z|12]]|13|$5|W|X|Y|A|$Z|14]]|15|$5|W|X|Y|A|$Z|16]]]]

<pre><code>name, *line = input().split() &lt;--- doubt

input() # reads single line of input
# 'abc 23 34 45'

.split() # splits it into a list of whitespace separated tokens
# ['abc', '23', '34', '45']

name, *line = ... # name is assigned first token, line a list of the remaining tokens
name # 'abc'
line # ['23', '34', '45']

scores = list(map(float, line)) # maps float function onto the list of strings
scores # [23.0, 34.0, 45.0]
</code></pre>

Some references:

<ul>
<li><a href="https://docs.python.org/3/library/functions.html#map" rel="nofollow noreferrer">map</a></li>
<li><a href="https://docs.python.org/3/library/stdtypes.html#str.split" rel="nofollow noreferrer">str.split</a></li>
<li><a href="https://docs.python.org/3/library/functions.html#input" rel="nofollow noreferrer">input</a></li>
<li><a href="https://www.python.org/dev/peps/pep-3132/#id4" rel="nofollow noreferrer">starred assignment</a></li>
</ul>

blocks|key|340777|text|name,+*line+=+"foo+23+34+45".split()
assert(name+==+"foo");
assert(line+==+["23",+"34",+"45"])|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|340778|https://docs.python.org/3/tutorial/controlflow.html#arbitrary-argument-lists|unstyled|offset|length|340779|scores+=+list(map(float,+line))
assert(scores+==+[23.0,+34.0,+45.0])|340780|https://docs.python.org/3/library/functions.html|340781|entityMap|0|LINK|mutability|MUTABLE|url|1^0|0|0|24|0|0|0|0|1C|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|V|8|@]|9|@$G|W|H|X|1|Y]]|A|$]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$B|C]]|$1|K|3|L|5|F|7|10|8|@]|9|@$G|11|H|12|1|13]]|A|$]]|$1|M|3|-4|5|F|7|14|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|E]]|T|$5|P|Q|R|A|$S|L]]]]

<pre><code>name, *line = "foo 23 34 45".split()
assert(name == "foo");
assert(line == ["23", "34", "45"])
</code></pre>

<a href="https://docs.python.org/3/tutorial/controlflow.html#arbitrary-argument-lists" rel="nofollow noreferrer">https://docs.python.org/3/tutorial/controlflow.html#arbitrary-argument-lists</a>

<pre><code>scores = list(map(float, line))
assert(scores == [23.0, 34.0, 45.0])
</code></pre>

<a href="https://docs.python.org/3/library/functions.html" rel="nofollow noreferrer">https://docs.python.org/3/library/functions.html</a>

blocks|key|340802|text|您想从我们使用的用户中获取数据|type|unstyled|depth|inlineStyleRanges|entityRanges|data|340803|scanf('%25d+%25d',+%25name,+%25value)
name,+value=input(),+input()|code-block|syntax|javascript|340804|另一种解决方案是：|340805|name,+value=input().split()|340806|使用拆分方法|340807|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

you want to get data form user we use

<pre><code>scanf('%d %d', %name, %value)
name, value=input(), input()
</code></pre>

Another solution is that:

<pre><code>name, value=input().split()
</code></pre>

use split method

blocks|key|4121534|text|1)名称，*行=输入().split()<-怀疑|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4121535|*用于存储split语句的额外返回值。假设你有：|4121536|名称，*行=输入().split()|4121537|打印(名称)|4121538|打印(*行)|4121539|然后运行以下代码并输入："abc+23+34+45"，它将打印出来：|4121540|abc|4121541|23、34、45|4121542|2)分数=list(map(浮动，行))<-怀疑|4121543|在这里，map()函数在将给定函数应用于给定可迭代对象(列表、元组等)的每一项之后，返回结果的map对象(即迭代器)。有关更多了解，请参阅：https://www.geeksforgeeks.org/python-map-function/|offset|length|4121544|->map()函数将浮点函数映射到字符串列表。|4121545|例如:+line+=+23，34，45，那么scores+=+list(map(float，line))将输出到:+scores+=+23.0，34.0，45.0|4121546|entityMap|0|LINK|mutability|MUTABLE|url|https://www.geeksforgeeks.org/python-map-function/^0|0|0|0|0|0|0|0|0|0|1Y|1E|0|0|0|0^^$0|@$1|2|3|4|5|6|7|17|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|18|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|19|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1A|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1B|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|1C|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|1D|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|1E|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1F|8|@]|9|@]|A|$]]|$1|R|3|S|5|6|7|1G|8|@]|9|@$T|1H|U|1I|1|1J]]|A|$]]|$1|V|3|W|5|6|7|1K|8|@]|9|@]|A|$]]|$1|X|3|Y|5|6|7|1L|8|@]|9|@]|A|$]]|$1|Z|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|10|$11|$5|12|13|14|A|$15|16]]]]

1)name, *line = input().split() &lt;--- doubt
The * is being used to store the additional returns from the split statement.
Let's say you have:
name, *line = input().split()
print(name)
print(*line)
And you ran this code and say you entered: &quot;abc 23 34 45&quot;, it will print out:
abc
[23, 34, 45]
2)scores = list(map(float, line)) &lt;--- doubt
Here, the map() function returns a map object(which is an iterator) of the results after applying the given function to each item of a given iterable (list, tuple, etc.).
For more understanding, refer: <a href="https://www.geeksforgeeks.org/python-map-function/" rel="nofollow noreferrer">https://www.geeksforgeeks.org/python-map-function/</a>
-&gt;map() function maps float function onto the list of strings.
For example:
line = [23, 34, 45]
then scores = list(map(float, line)) will output to: scores = [23.0, 34.0, 45.0]

need help on the highlighted lines in the python code:

<pre><code>n = int(input())
student_marks = {}
for _ in range(n):
 name, *line = input().split() &lt;--- doubt
 scores = list(map(float, line)) &lt;--- doubt
 student_marks[name] = scores

print (student_marks)
</code></pre>

The output which i get is below:

<pre><code>2
abc 23 34 45
def 45 46 47
{'abc': [23.0, 34.0, 45.0], 'def': [45.0, 46.0, 47.0]}
</code></pre>

Can you guys please help me explain the need for the marked line in the code. Couldn't quite get the concept.

declaring input for Dictionaries in python

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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需要有关python代码中突出显示的行的帮助：n = int(input())student_marks = {}for _ in range(n): name, *line = input().split() <--- doubt scores = list(map(float, line)) <--- ...

问在python中声明字典的输入
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