'Why Does Python Has a 'Pass' Statement' python pythontips
statement in the official document is very straightforward, and the following three examples can let us quickly understand how to use it:is a null operation. And when the interpreter reaches it, it skips without doing anything except checking whether the syntax is legal.
It is just like the comment we wrote, except that it occupies a line of code. It will not have any impact on the scope it is in.Why does Python have such a unique pass statement, but other languages don't?Is it to solve the common problems that most programming languages have to face, or because it has its own new discoveries, it creates a new feature.
If we use the comment mentioned above instead, what will happen? Write like this, it will also report an error:# By adding comment def func: # Code block will add something later funcis not a valid grammatical content. It will be ignored by the Python interpreter , unlike thestatement that implies "valid grammatical content, but skips". In other words, the indented code block must contain grammatically meaningful content.
Other languages do not have a special kind of sentence or symbol to represent this kind of placeholder , but they do not need to bother to design a keyword to complete the grammatical completeness .
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