在python中将两个字符串加在一起
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Adding two strings together in python
提问by Lee
I'm trying to place two strings together but when I run this code I keep getting an error. I'm sure this is something basic but I ahave been playing with this for 30 minutes and can't figure out what's wrong
我试图将两个字符串放在一起，但是当我运行此代码时，我不断收到错误消息。我确定这是一些基本的东西，但我已经玩了 30 分钟，但不知道出了什么问题
filename= 'data.txt'
1output = '1min' + filename
采纳答案by Lee
Like most languages, Python does not allow you to create a name that starts with a number. This means that you need to rename 1outputbecause its name is illegal:
与大多数语言一样，Python 不允许您创建以数字开头的名称。这意味着您需要重命名，1output因为它的名称是非法的：
output1 = '1min' + filename
Below is a demonstration:
下面是一个演示：
>>> filename = 'data.txt'
>>> 1output = '1min' + filename
File "<stdin>", line 1
1output = '1min' + filename
^
SyntaxError: invalid syntax
>>>
>>> filename = 'data.txt'
>>> output1 = '1min' + filename
>>> output1
'1mindata.txt'
>>>
When creating names in Python, you must obey the following rules*:
在 Python 中创建名称时，必须遵守以下规则*：
The first character must be either a letter or an underscore.
The rest of the characters must be letters, underscores, and/or numbers.
The finished name cannot be the same as one of the keywords(
if,def,for, etc.).
第一个字符必须是字母或下划线。
其余字符必须是字母、下划线和/或数字。
成品名称不能是一样的一个关键字（
if，def，for等）。
*Note:In addition, you should refrain from creating a name that is the same as one of the built-in functions(str, input, list, etc.). While doing so islegal, it is considered a bad practice by many Python coders (author included). This is because it will overshadow the built-in and thereby make it unusable in the current scope.
*注：另外，你应该从创建一个名称相同的一个避免内置功能（str，input，list等）。虽然这样做是合法的，但许多 Python 编码人员（包括作者）认为这是一种不好的做法。这是因为它会掩盖内置函数，从而使其在当前作用域中无法使用。
