python打不出单引号是什么原因

Python的单引号通常可以表示字符串。若字符串没有引号嵌套，则对可打印转义字符（\,',",\ooo,\xhh）进行转义。若字符串有引号嵌

套，则对嵌套内部字符全部不进行转义，保持原始格式；对嵌套外部字符参照1进行转义。

注意print会对所有转义字符进行转义。

下面是几个例子：

'spam eggs'

'spam eggs'

'doesn't' # 对可打印字符转义

"doesn't"

"doesn't" # 同上

"doesn't"

"doesn't" # 这样可以省去\

"doesn't"

'"doesn't"' # 嵌套后内部全部不进行转义

'"doesn't"'

""Yes," he said." # 同类型引号，需要进行转义

'"Yes," he said.'

问题来源于python学习网