Python 数字序列
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Python Sequence of Numbers
提问by xtheking
I've decided not to waste my summer and start learning python. I figured I'd start learning looping techniques so I wanted to start with a basic list of numbers, aka, write a for loop that will generate the numbers 1 - 10.
我决定不浪费我的暑假开始学习 Python。我想我会开始学习循环技术，所以我想从一个基本的数字列表开始，也就是写一个 for 循环来生成数字 1 - 10。
This is what I have:
这就是我所拥有的：
def generateNumber(num):
i=0
for i in range(num):
return i
return i
and the code doesn't work. I want to get an output in a list like this:
并且代码不起作用。我想在这样的列表中得到一个输出：
>>> generateNumber(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
采纳答案by tom10
Trying to be consistent with what you first tried, you could do something like this
试图与你第一次尝试的保持一致，你可以做这样的事情
def generateNumber(num):
mylist = []
for i in range(num+1):
mylist.append(i)
return mylist
x = generateNumber(10)
but, you could, instead just say,
但是，你可以，而只是说，
x = range(10+1) # gives a generator that will make a list
or
或者
x = list(range(10+1)) # if you want a real list
In general though, you should keep this list based on inputting the number 10 so it is [0...9] and not [0...10].
不过，一般而言，您应该根据输入数字 10 保留此列表，因此它是 [0...9] 而不是 [0...10]。
回答by TankorSmash
The rangefunction already does what you are setting out to do.
该range功能已经完成了您要做的事情。
If you're in Python 2, range(10)returns 0 through 9, or in Python 3 it's list(range(10)).
如果你在 Python 2 中，range(10)返回 0 到 9，或者在 Python 3 中它是list(range(10)).
回答by pkacprzak
By default, range(n) produces list of numbers [0, 1, ..., n-1].
默认情况下，range(n) 生成数字列表 [0, 1, ..., n-1]。
If you want a list of numbers from a to b inclusive, you should call:
如果你想要一个从 a 到 b 的数字列表，你应该调用：
range(a, b + 1)
Which in your case is:
在你的情况下是：
range(1, 11)
回答by Steven Wexler
You probably want to create a list in your function, use the yieldkeyword, or use the built in listfunction.
您可能希望在您的函数中创建一个列表，使用yield关键字，或使用内置的列表函数。
def generateNumberList(num):
myList = []
for i in range(num):
myList.append(i)
#Notice that your return the list you've created rather
#than each individaul integer
return myList
print generateNumberList(10)
def generateNumberList2(num):
for i in range(10):
yield i
for i in generateNumberList2(10):
print i
def generateNumberList3(num):
return list(range(num))
print generateNumberList3(10)
回答by codeprogress
It might help to implement this with the ability to specify a range:
通过指定范围的能力来实现这一点可能会有所帮助：
def generateNumber(low, high):
'''returns a list with integers between low and high inclusive
example: generateNumber(2,10) --> [2,3,4,5,6,7,8,9,10]
'''
return range(low, high+1)
This can also be done with the built-in range function:
这也可以通过内置的 range 函数来完成：
range(10) --> [0,1,2,3,4,5,6,7,8,9] #note the "off by one"
range(11) --> [0,1,2,3,4,5,6,7,8,9,10]
range(2,11) --> [2,3,4,5,6,7,8,9,10]
More about range: http://docs.python.org/2/library/functions.html#range
更多关于范围：http: //docs.python.org/2/library/functions.html#range
回答by Sabrina
Easiest way to generate numbers is by using rangefunction
生成数字的最简单方法是使用range函数
The range()function has two sets of parameters, as follows:
该range()函数有两组参数，如下：
range(stop)
range(stop)
> stop: Number of integers (whole numbers) to generate, starting from
> zero. eg. range(3) == [0, 1, 2].
range([start], stop[, step])
range([start], stop[, step])
> start: Starting number of the sequence.
> stop: Generate numbers up to, but not including this number.
> step: Difference between each number in the sequence.
Note that:
注意：
- All parameters must be integers.
- All parameters can be positive or negative.
- range() (and Python in general) is 0-index based, meaning list indexes start at 0, not 1. eg. The syntax to access the first element of a list is mylist[0]. Therefore the last integer generated by range() is up to, but not including, stop. For example range(0, 5) generates integers from 0 up to, but not including, 5.
- 所有参数必须是整数。
- 所有参数都可以是正数或负数。
- range()（以及一般的 Python）是基于 0 索引的，这意味着列表索引从 0 开始，而不是 1。例如。访问列表第一个元素的语法是 mylist[0]。因此 range() 生成的最后一个整数最多但不包括停止。例如 range(0, 5) 生成从 0 到但不包括 5 的整数。
e.g.
例如
Print 0 to 9
打印 0 到 9
[user@linux ~]~ python -c "print list(range(10))"
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
[user@linux ~]~
Print 1 to 9
打印 1 到 9
[user@linux ~]~ python -c "print list(range(1,10))"
[1, 2, 3, 4, 5, 6, 7, 8, 9]
[user@linux ~]~
Print 1 to 10
打印 1 到 10
[user@linux ~]~ python -c "print list(range(1,11))"
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
[user@linux ~]~
Reference: https://www.pythoncentral.io/pythons-range-function-explained/
参考：https: //www.pythoncentral.io/pythons-range-function-explained/
