In python say you have
在python中说你有
s = "string"
i = 0
print s+i
will give you error so you write
会给你错误，所以你写
print s+str(i)
to not get error.
没有得到错误。
I think this is quite a clumsy way to handle int and string concatenation. Even Java does not need explicit casting to String to do this sort of concatenation. Is there a better way to do this sort of concatenation i.e without explicit casting in Python?
我认为这是处理int和字符串连接的一种笨拙的方式。甚至Java也不需要显式转换为String来进行这种连接。是否有更好的方法来进行这种连接，即在Python中没有显式转换？
4 个解决方案
#1
117
Modern string formatting:
现代字符串格式：
"{} and {}".format("string", 1)
#2
72
No string formatting:
没有字符串格式：
>> print 'Foo',0
Foo 0
#3
24
String formatting, using the new-style .format() method (with the defaults .format() provides):
字符串格式化，使用新式的.format（）方法（默认为.format（）提供）：
'{}{}'.format(s, i)
Or the older, but "still sticking around", %-formatting:
或者更老，但“仍然坚持”，％ - 格式：
'%s%d' %(s, i)
In both examples above there's no space between the two items concatenated. If space is needed, it can simply be added in the format strings.
在上面的两个例子中，连接的两个项目之间没有空格。如果需要空间，可以简单地将其添加到格式字符串中。
These provide a lot of control and flexibility about how to concatenate items, the space between them etc. For details about format specifications see this.
这些为如何连接项目，它们之间的空间等提供了很多控制和灵活性。有关格式规范的详细信息，请参阅此内容。
#4
11
Python is an interesting language in that while there is usually one (or two) "obvious" ways to accomplish any given task, flexibility still exists.
Python是一种有趣的语言，虽然通常有一种（或两种）“明显”的方法来完成任何给定的任务，但灵活性仍然存在。
s = "string"
i = 0
print (s + repr(i))
The above code snippet is written in Python3 syntax but the parentheses after print were always allowed (optional) until version 3 made them mandatory.
上面的代码片段是用Python3语法编写的，但是打印后的括号始终是允许的（可选），直到版本3使它们成为必需的。
Hope this helps.
希望这可以帮助。
Caitlin
凯特琳
#1
117
Modern string formatting:
现代字符串格式：
"{} and {}".format("string", 1)
#2
72
No string formatting:
没有字符串格式：
>> print 'Foo',0
Foo 0
#3
24
String formatting, using the new-style .format() method (with the defaults .format() provides):
字符串格式化，使用新式的.format（）方法（默认为.format（）提供）：
'{}{}'.format(s, i)
Or the older, but "still sticking around", %-formatting:
或者更老，但“仍然坚持”，％ - 格式：
'%s%d' %(s, i)
In both examples above there's no space between the two items concatenated. If space is needed, it can simply be added in the format strings.
在上面的两个例子中，连接的两个项目之间没有空格。如果需要空间，可以简单地将其添加到格式字符串中。
These provide a lot of control and flexibility about how to concatenate items, the space between them etc. For details about format specifications see this.
这些为如何连接项目，它们之间的空间等提供了很多控制和灵活性。有关格式规范的详细信息，请参阅此内容。
#4
11
Python is an interesting language in that while there is usually one (or two) "obvious" ways to accomplish any given task, flexibility still exists.
Python是一种有趣的语言，虽然通常有一种（或两种）“明显”的方法来完成任何给定的任务，但灵活性仍然存在。
s = "string"
i = 0
print (s + repr(i))
The above code snippet is written in Python3 syntax but the parentheses after print were always allowed (optional) until version 3 made them mandatory.
上面的代码片段是用Python3语法编写的，但是打印后的括号始终是允许的（可选），直到版本3使它们成为必需的。
Hope this helps.
希望这可以帮助。
Caitlin
凯特琳