python中注意事项（更新）

1.print(a,b)，print打印多个变量，默认中间会有个空格作为分隔符，默认以换行符结尾

Docstring:
print(value, ..., sep=' ', end='
', file=sys.stdout, flush=False)

Prints the values to a stream, or to sys.stdout by default.
Optional keyword arguments:
file:  a file-like object (stream); defaults to the current sys.stdout.
sep:   string inserted between values, default a space.
end:   string appended after the last value, default a newline.
flush: whether to forcibly flush the stream.
Type:      builtin_function_or_method

2.range(1,10)，左闭右开，生成的结果为1-9　

3.input()获得的结果是字符串，如果要和数字比较，记得类型转换